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Are sequestional connections (from A to B to C) possible?

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	Are sequestional connections (from A to B to C) possible? by Martin Valley :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. This is NOT a problem with VNC. Rather it is a question regarding if it's possible to do something. From computer "A", I connect to computer "B" using TightVNC. Computers "A" and "B" are each on a LAN and behind a router; the connection is via high speed cable connections at both ends. All works fine - no problems. Computer "B" is equipped with a dial-up phone-line modem. I want to use that modem to dial out and make another VNC connection. This connection is actually to a special kind of modem which is on a LAN and, when a connection is made to it, it allows the calling computer to be "attached" to that LAN. If I'm physically sitting at computer "B" when doing this, it all works just fine. But, if I try to do this by using a remote-control session from computer "A", the moment computer "B" establishes it's connection to the remote modem, I lose the connection between computers "A" and "B". I'm assuming that this is caused by the fact that, when it connects to the modem, computer "B" gets a different IP address assigned to it (so that it can be on the remote network) and, thus Computer "A" can no longer connect to "B". My question is: is there any way this set up can be made to work? How can I keep the connection between "A" and "B" even when "B" is connected to the remote LAN? Thanks for any suggestions. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... To change your subscription or to UNSUBSCRIBE, please visit https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
	RE: Are sequestional connections (from A to B to C) possible? by Zachary True :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. Martin, I don’t think it has anything to do with Tight VNC as I do this somewhat often (A->B->C) in order to hop from one network to the next with the smallest amount of interaction between the two. I would guess it has something to do with computer ‘B’ dropping or resetting its IP address or routing information when the “special modem” creates its connection. -Zach True From: Martin Valley [mailto:martinv@...] Sent: Wednesday, November 04, 2009 2:49 PM To: vnc-tight-list@... Subject: Are sequestional connections (from A to B to C) possible? This is NOT a problem with VNC. Rather it is a question regarding if it's possible to do something. From computer "A", I connect to computer "B" using TightVNC. Computers "A" and "B" are each on a LAN and behind a router; the connection is via high speed cable connections at both ends. All works fine - no problems. Computer "B" is equipped with a dial-up phone-line modem. I want to use that modem to dial out and make another VNC connection. This connection is actually to a special kind of modem which is on a LAN and, when a connection is made to it, it allows the calling computer to be "attached" to that LAN. If I'm physically sitting at computer "B" when doing this, it all works just fine. But, if I try to do this by using a remote-control session from computer "A", the moment computer "B" establishes it's connection to the remote modem, I lose the connection between computers "A" and "B". I'm assuming that this is caused by the fact that, when it connects to the modem, computer "B" gets a different IP address assigned to it (so that it can be on the remote network) and, thus Computer "A" can no longer connect to "B". My question is: is there any way this set up can be made to work? How can I keep the connection between "A" and "B" even when "B" is connected to the remote LAN? Thanks for any suggestions. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... To change your subscription or to UNSUBSCRIBE, please visit https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
	Re: Are sequestional connections (from A to B to C) possible? by Martin Valley :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. Zach - I agree completely that it has nothing to do with VNC. Any ideas what I might do to get this to work? How do I get a computer ("B" in my case) to be on two networks at the same time? This must be what you're doing if you're able to establish A->B->C connections. FWIW, computers "A" and "B" are both running Windows XPPro with all service packs and updates. ----- Original Message ----- From: truez@... To: martinv@... ; vnc-tight-list@... Sent: Wednesday, November 04, 2009 2:42 PM Subject: RE: Are sequestional connections (from A to B to C) possible? Martin, I dont think it has anything to do with Tight VNC as I do this somewhat often (A->B->C) in order to hop from one network to the next with the smallest amount of interaction between the two. I would guess it has something to do with computer B dropping or resetting its IP address or routing information when the special modem creates its connection. -Zach True From: Martin Valley [mailto:martinv@...] Sent: Wednesday, November 04, 2009 2:49 PM To: vnc-tight-list@... Subject: Are sequestional connections (from A to B to C) possible? This is NOT a problem with VNC. Rather it is a question regarding if it's possible to do something. From computer "A", I connect to computer "B" using TightVNC. Computers "A" and "B" are each on a LAN and behind a router; the connection is via high speed cable connections at both ends. All works fine - no problems. Computer "B" is equipped with a dial-up phone-line modem. I want to use that modem to dial out and make another VNC connection. This connection is actually to a special kind of modem which is on a LAN and, when a connection is made to it, it allows the calling computer to be "attached" to that LAN. If I'm physically sitting at computer "B" when doing this, it all works just fine. But, if I try to do this by using a remote-control session from computer "A", the moment computer "B" establishes it's connection to the remote modem, I lose the connection between computers "A" and "B". I'm assuming that this is caused by the fact that, when it connects to the modem, computer "B" gets a different IP address assigned to it (so that it can be on the remote network) and, thus Computer "A" can no longer connect to "B". My question is: is there any way this set up can be made to work? How can I keep the connection between "A" and "B" even when "B" is connected to the remote LAN? Thanks for any suggestions. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... To change your subscription or to UNSUBSCRIBE, please visit https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
	RE: Are sequestional connections (from A to B to C) possible? by Zachary True :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. Martin, Does “B” have multiple interfaces? It is easier conceptually to set it up, but on my setup, there is only 1 interface. It has multiple static IP’s set on it. I would look most specifically at the modem software to see what processes and steps are followed during the connection attempt. -Zach True From: Martin Valley [mailto:martinv@...] Sent: Wednesday, November 04, 2009 3:59 PM To: Zachary True; vnc-tight-list@... Subject: Re: Are sequestional connections (from A to B to C) possible? Zach - I agree completely that it has nothing to do with VNC. Any ideas what I might do to get this to work? How do I get a computer ("B" in my case) to be on two networks at the same time? This must be what you're doing if you're able to establish A->B->C connections. FWIW, computers "A" and "B" are both running Windows XPPro with all service packs and updates. ----- Original Message ----- From: truez@... To: martinv@... ; vnc-tight-list@... Sent: Wednesday, November 04, 2009 2:42 PM Subject: RE: Are sequestional connections (from A to B to C) possible? Martin, I don’t think it has anything to do with Tight VNC as I do this somewhat often (A->B->C) in order to hop from one network to the next with the smallest amount of interaction between the two. I would guess it has something to do with computer ‘B’ dropping or resetting its IP address or routing information when the “special modem” creates its connection. -Zach True From: Martin Valley [mailto:martinv@...] Sent: Wednesday, November 04, 2009 2:49 PM To: vnc-tight-list@... Subject: Are sequestional connections (from A to B to C) possible? This is NOT a problem with VNC. Rather it is a question regarding if it's possible to do something. From computer "A", I connect to computer "B" using TightVNC. Computers "A" and "B" are each on a LAN and behind a router; the connection is via high speed cable connections at both ends. All works fine - no problems. Computer "B" is equipped with a dial-up phone-line modem. I want to use that modem to dial out and make another VNC connection. This connection is actually to a special kind of modem which is on a LAN and, when a connection is made to it, it allows the calling computer to be "attached" to that LAN. If I'm physically sitting at computer "B" when doing this, it all works just fine. But, if I try to do this by using a remote-control session from computer "A", the moment computer "B" establishes it's connection to the remote modem, I lose the connection between computers "A" and "B". I'm assuming that this is caused by the fact that, when it connects to the modem, computer "B" gets a different IP address assigned to it (so that it can be on the remote network) and, thus Computer "A" can no longer connect to "B". My question is: is there any way this set up can be made to work? How can I keep the connection between "A" and "B" even when "B" is connected to the remote LAN? Thanks for any suggestions. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... To change your subscription or to UNSUBSCRIBE, please visit https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
	Re: Are sequestional connections (from A to B to C) possible? by Martin Valley :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. Well, I'd call it "multiple" interfaces. It has a single NIC through which it is attached to a LAN. The NIC is using an IP address like 192.168.200.123 (computer "A" is connecting through this by connecting through the router's outside IP address and is routed to the 192.168.200.123 address). When the modem is used to dial out and connect to the "special modem", that establishes what I would consider to be a second interface. The "special modem" is on the remote LAN and has an address like 192.168.100.1. I'm assuming that the modem in computer "B" then somehow sets B's address to something like 192.168.100.xxx to allow it to communicate on the remote LAN. ----- Original Message ----- From: truez@... To: martinv@... ; vnc-tight-list@... Sent: Wednesday, November 04, 2009 3:24 PM Subject: RE: Are sequestional connections (from A to B to C) possible? Martin, Does B have multiple interfaces? It is easier conceptually to set it up, but on my setup, there is only 1 interface. It has multiple static IPs set on it. I would look most specifically at the modem software to see what processes and steps are followed during the connection attempt. -Zach True From: Martin Valley [mailto:martinv@...] Sent: Wednesday, November 04, 2009 3:59 PM To: Zachary True; vnc-tight-list@... Subject: Re: Are sequestional connections (from A to B to C) possible? Zach - I agree completely that it has nothing to do with VNC. Any ideas what I might do to get this to work? How do I get a computer ("B" in my case) to be on two networks at the same time? This must be what you're doing if you're able to establish A->B->C connections. FWIW, computers "A" and "B" are both running Windows XPPro with all service packs and updates. ----- Original Message ----- From: truez@... To: martinv@... ; vnc-tight-list@... Sent: Wednesday, November 04, 2009 2:42 PM Subject: RE: Are sequestional connections (from A to B to C) possible? Martin, I dont think it has anything to do with Tight VNC as I do this somewhat often (A->B->C) in order to hop from one network to the next with the smallest amount of interaction between the two. I would guess it has something to do with computer B dropping or resetting its IP address or routing information when the special modem creates its connection. -Zach True From: Martin Valley [mailto:martinv@...] Sent: Wednesday, November 04, 2009 2:49 PM To: vnc-tight-list@... Subject: Are sequestional connections (from A to B to C) possible? This is NOT a problem with VNC. Rather it is a question regarding if it's possible to do something. From computer "A", I connect to computer "B" using TightVNC. Computers "A" and "B" are each on a LAN and behind a router; the connection is via high speed cable connections at both ends. All works fine - no problems. Computer "B" is equipped with a dial-up phone-line modem. I want to use that modem to dial out and make another VNC connection. This connection is actually to a special kind of modem which is on a LAN and, when a connection is made to it, it allows the calling computer to be "attached" to that LAN. If I'm physically sitting at computer "B" when doing this, it all works just fine. But, if I try to do this by using a remote-control session from computer "A", the moment computer "B" establishes it's connection to the remote modem, I lose the connection between computers "A" and "B". I'm assuming that this is caused by the fact that, when it connects to the modem, computer "B" gets a different IP address assigned to it (so that it can be on the remote network) and, thus Computer "A" can no longer connect to "B". My question is: is there any way this set up can be made to work? How can I keep the connection between "A" and "B" even when "B" is connected to the remote LAN? Thanks for any suggestions. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... To change your subscription or to UNSUBSCRIBE, please visit https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
	RE: Are sequestional connections (from A to B to C) possible? by Zachary True :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. Martin, I would try to set multiple static IP’s on the NIC on computer “B.” See if that takes care of it, if not, you may have to modify how the “special modem” software works. -Zach True From: Martin Valley [mailto:martinv@...] Sent: Wednesday, November 04, 2009 4:45 PM To: Zachary True; vnc-tight-list@... Subject: Re: Are sequestional connections (from A to B to C) possible? Well, I'd call it "multiple" interfaces. It has a single NIC through which it is attached to a LAN. The NIC is using an IP address like 192.168.200.123 (computer "A" is connecting through this by connecting through the router's outside IP address and is routed to the 192.168.200.123 address). When the modem is used to dial out and connect to the "special modem", that establishes what I would consider to be a second interface. The "special modem" is on the remote LAN and has an address like 192.168.100.1. I'm assuming that the modem in computer "B" then somehow sets B's address to something like 192.168.100.xxx to allow it to communicate on the remote LAN. ----- Original Message ----- From: truez@... To: martinv@... ; vnc-tight-list@... Sent: Wednesday, November 04, 2009 3:24 PM Subject: RE: Are sequestional connections (from A to B to C) possible? Martin, Does “B” have multiple interfaces? It is easier conceptually to set it up, but on my setup, there is only 1 interface. It has multiple static IP’s set on it. I would look most specifically at the modem software to see what processes and steps are followed during the connection attempt. -Zach True From: Martin Valley [mailto:martinv@...] Sent: Wednesday, November 04, 2009 3:59 PM To: Zachary True; vnc-tight-list@... Subject: Re: Are sequestional connections (from A to B to C) possible? Zach - I agree completely that it has nothing to do with VNC. Any ideas what I might do to get this to work? How do I get a computer ("B" in my case) to be on two networks at the same time? This must be what you're doing if you're able to establish A->B->C connections. FWIW, computers "A" and "B" are both running Windows XPPro with all service packs and updates. ----- Original Message ----- From: truez@... To: martinv@... ; vnc-tight-list@... Sent: Wednesday, November 04, 2009 2:42 PM Subject: RE: Are sequestional connections (from A to B to C) possible? Martin, I don’t think it has anything to do with Tight VNC as I do this somewhat often (A->B->C) in order to hop from one network to the next with the smallest amount of interaction between the two. I would guess it has something to do with computer ‘B’ dropping or resetting its IP address or routing information when the “special modem” creates its connection. -Zach True From: Martin Valley [mailto:martinv@...] Sent: Wednesday, November 04, 2009 2:49 PM To: vnc-tight-list@... Subject: Are sequestional connections (from A to B to C) possible? This is NOT a problem with VNC. Rather it is a question regarding if it's possible to do something. From computer "A", I connect to computer "B" using TightVNC. Computers "A" and "B" are each on a LAN and behind a router; the connection is via high speed cable connections at both ends. All works fine - no problems. Computer "B" is equipped with a dial-up phone-line modem. I want to use that modem to dial out and make another VNC connection. This connection is actually to a special kind of modem which is on a LAN and, when a connection is made to it, it allows the calling computer to be "attached" to that LAN. If I'm physically sitting at computer "B" when doing this, it all works just fine. But, if I try to do this by using a remote-control session from computer "A", the moment computer "B" establishes it's connection to the remote modem, I lose the connection between computers "A" and "B". I'm assuming that this is caused by the fact that, when it connects to the modem, computer "B" gets a different IP address assigned to it (so that it can be on the remote network) and, thus Computer "A" can no longer connect to "B". My question is: is there any way this set up can be made to work? How can I keep the connection between "A" and "B" even when "B" is connected to the remote LAN? Thanks for any suggestions. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... To change your subscription or to UNSUBSCRIBE, please visit https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
	Re: Are sequestional connections (from A to B to C) possible? by Phil Tilson :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. As an interested observer of this exchange, can I ask what might be a silly question? Surely, it is the MODEM that is participating on the remote network with computer C? Computer B is communicating with that via (effectively) a serial interface and should not require any IP address - it should piggy-back on the IP address of the special modem. Thus there should be no need for the original IP address of computer B to change at all. Or am I missing something fundamental here?! Phil Tilson Martin Valley wrote: Well, I'd call it "multiple" interfaces. It has a single NIC through which it is attached to a LAN. The NIC is using an IP address like 192.168.200.123 (computer "A" is connecting through this by connecting through the router's outside IP address and is routed to the 192.168.200.123 address). When the modem is used to dial out and connect to the "special modem", that establishes what I would consider to be a second interface. The "special modem" is on the remote LAN and has an address like 192.168.100.1. I'm assuming that the modem in computer "B" then somehow sets B's address to something like 192.168.100.xxx to allow it to communicate on the remote LAN. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... To change your subscription or to UNSUBSCRIBE, please visit https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
	Re: Are sequestional connections (from A to B to C) possible? by Martin Valley :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. This may very well be the crux of the entire issue. I mis-explained something in my previous message. The modem in "B" does not "somehow set B's address to something like xxx". The modem connection is made using the "Network Connections" feature in WinXPP. One of the properties in there is the specification of a "local" IP address (for computer "B"). I have that set to 192.168.100.66 (this fits in with the 192.168.100.xxx addressing used on the remote LAN) I'll have to do some experimentation with this but I think that it is required in order to establish computer B's presence on the remote LAN. It's just using "special modem" to make the physical connection. It would seem to me that, in any case, establishing a connection via the modem should not break the connection that exists via the NIC. But I'm not knowledgeable enough about LANs to really understand this. ----- Original Message ----- From: Phil@... To: martinv@... Sent: Wednesday, November 04, 2009 3:58 PM Subject: Re: Are sequestional connections (from A to B to C) possible? As an interested observer of this exchange, can I ask what might be a silly question? Surely, it is the MODEM that is participating on the remote network with computer C? Computer B is communicating with that via (effectively) a serial interface and should not require any IP address - it should piggy-back on the IP address of the special modem. Thus there should be no need for the original IP address of computer B to change at all. Or am I missing something fundamental here?! Phil Tilson Martin Valley wrote: Well, I'd call it "multiple" interfaces. It has a single NIC through which it is attached to a LAN. The NIC is using an IP address like 192.168.200.123 (computer "A" is connecting through this by connecting through the router's outside IP address and is routed to the 192.168.200.123 address). When the modem is used to dial out and connect to the "special modem", that establishes what I would consider to be a second interface. The "special modem" is on the remote LAN and has an address like 192.168.100.1. I'm assuming that the modem in computer "B" then somehow sets B's address to something like 192.168.100.xxx to allow it to communicate on the remote LAN. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... To change your subscription or to UNSUBSCRIBE, please visit https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
	Re: Are sequestional connections (from A to B to C) possible? by James Weatherall-2 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Martin, This should work fine provided that the routing is set up correctly. Dial-up or VPN connections will usually set themselves as the "default gateway" for all traffic other than that to the client's particular IP address. In your case, that will break the VNC connection from A->B, since B will start trying to route traffic to A via the dial-up link, rather than the broadband connection. If you can persuade the dial-up to configure a gateway only for computer C's particular IP address (or subnet), and leave the broadband connection's default gateway responsible for all other traffic, then things should work. HTH, -- Wez @ RealVNC Ltd Martin Valley wrote: > This may very well be the crux of the entire issue. > > I mis-explained something in my previous message. The modem in "B" does > not "somehow set B's address to something like xxx". The modem > connection is made using the "Network Connections" feature in WinXPP. > One of the properties in there is the specification of a "local" IP > address (for computer "B"). I have that set to 192.168.100.66 (this fits > in with the 192.168.100.xxx addressing used on the remote LAN) > > I'll have to do some experimentation with this but I think that it is > required in order to establish computer B's presence on the remote LAN. > It's just using "special modem" to make the physical connection. > > It would seem to me that, in any case, establishing a connection via the > modem should not break the connection that exists via the NIC. But I'm > not knowledgeable enough about LANs to really understand this. > > > ----- Original Message ----- > From: Phil Tilson <mailto:Phil@...> > To: Martin Valley <mailto:martinv@...> > Sent: Wednesday, November 04, 2009 3:58 PM > Subject: Re: Are sequestional connections (from A to B to C) possible? > > As an interested observer of this exchange, can I ask what might be > a silly question? > > Surely, it is the MODEM that is participating on the remote network > with computer C? Computer B is communicating with that via > (effectively) a serial interface and should not require any IP > address - it should piggy-back on the IP address of the special > modem. Thus there should be no need for the original IP address of > computer B to change at all. > > Or am I missing something fundamental here?! > > Phil Tilson > > > > Martin Valley wrote: >> Well, I'd call it "multiple" interfaces. >> >> It has a single NIC through which it is attached to a LAN. The NIC >> is using an IP address like 192.168.200.123 (computer "A" is >> connecting through this by connecting through the router's outside >> IP address and is routed to the 192.168.200.123 address). >> >> When the modem is used to dial out and connect to the "special >> modem", that establishes what I would consider to be a second >> interface. >> The "special modem" is on the remote LAN and has an address like >> 192.168.100.1. I'm assuming that the modem in computer "B" then >> somehow sets B's address to something like 192.168.100.xxx to >> allow it to communicate on the remote LAN. >> > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > > > ------------------------------------------------------------------------ > > ___________________________________________________________ > TightVNC mailing list, VNC-Tight-list@... > To change your subscription or to UNSUBSCRIBE, please visit > https://lists.sourceforge.net/lists/listinfo/vnc-tight-list -- -- James Weatherall - Chief Scientist RealVNC Ltd - http://www.realvnc.com ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... To change your subscription or to UNSUBSCRIBE, please visit https://lists.sourceforge.net/lists/listinfo/vnc-tight-list
	Re: Are sequestional connections (from A to B to C) possible? by Martin Valley :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message James - I think what you're saying accurately describes the situation. The problem is, I don't know how to do what you're suggesting. I've done some Googling around on this and from what I've been able to gather so far is that I need to create a "bridge" between the two networks. But one thing I read said that a bridge can be established only between two NICs and cannot be established between a NIC and a dial-up connection. If you (or anyone here) can tell me how to create this bridge (or some other way to do it), I would be greatly appreciative. Thanks. ----- Original Message ----- From: "James Weatherall" <james.weatherall@...> To: "Martin Valley" <martinv@...> Cc: "Phil Tilson" <Phil@...>; <vnc-tight-list@...> Sent: Thursday, November 05, 2009 4:21 AM Subject: Re: Are sequestional connections (from A to B to C) possible? > Martin, > > This should work fine provided that the routing is set up correctly. > > Dial-up or VPN connections will usually set themselves as the "default > gateway" for all traffic other than that to the client's particular IP > address. In your case, that will break the VNC connection from A->B, > since B will start trying to route traffic to A via the dial-up link, > rather than the broadband connection. > > If you can persuade the dial-up to configure a gateway only for computer > C's particular IP address (or subnet), and leave the broadband > connection's default gateway responsible for all other traffic, then > things should work. > > HTH, > > -- > Wez @ RealVNC Ltd > > > Martin Valley wrote: >> This may very well be the crux of the entire issue. >> I mis-explained something in my previous message. The modem in "B" does >> not "somehow set B's address to something like xxx". The modem connection >> is made using the "Network Connections" feature in WinXPP. One of the >> properties in there is the specification of a "local" IP address (for >> computer "B"). I have that set to 192.168.100.66 (this fits in with the >> 192.168.100.xxx addressing used on the remote LAN) >> I'll have to do some experimentation with this but I think that it is >> required in order to establish computer B's presence on the remote LAN. >> It's just using "special modem" to make the physical connection. >> It would seem to me that, in any case, establishing a connection via the >> modem should not break the connection that exists via the NIC. But I'm >> not knowledgeable enough about LANs to really understand this. >> ----- Original Message ----- >> From: Phil Tilson <mailto:Phil@...> >> To: Martin Valley <mailto:martinv@...> >> Sent: Wednesday, November 04, 2009 3:58 PM >> Subject: Re: Are sequestional connections (from A to B to C) >> possible? >> >> As an interested observer of this exchange, can I ask what might be >> a silly question? >> >> Surely, it is the MODEM that is participating on the remote network >> with computer C? Computer B is communicating with that via >> (effectively) a serial interface and should not require any IP >> address - it should piggy-back on the IP address of the special >> modem. Thus there should be no need for the original IP address of >> computer B to change at all. >> >> Or am I missing something fundamental here?! >> >> Phil Tilson >> >> >> >> Martin Valley wrote: >>> Well, I'd call it "multiple" interfaces. >>> It has a single NIC through which it is attached to a LAN. The NIC >>> is using an IP address like 192.168.200.123 (computer "A" is >>> connecting through this by connecting through the router's outside >>> IP address and is routed to the 192.168.200.123 address). >>> When the modem is used to dial out and connect to the "special >>> modem", that establishes what I would consider to be a second >>> interface. >>> The "special modem" is on the remote LAN and has an address like >>> 192.168.100.1. I'm assuming that the modem in computer "B" then >>> somehow sets B's address to something like 192.168.100.xxx to >>> allow it to communicate on the remote LAN. >>> >> >> >> ------------------------------------------------------------------------ >> >> ------------------------------------------------------------------------------ >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 >> 30-Day trial. Simplify your report design, integration and deployment - >> and focus on what you do best, core application coding. Discover what's >> new with >> Crystal Reports now. http://p.sf.net/sfu/bobj-july >> >> >> ------------------------------------------------------------------------ >> >> ___________________________________________________________ >> TightVNC mailing list, VNC-Tight-list@... >> To change your subscription or to UNSUBSCRIBE, please visit >> https://lists.sourceforge.net/lists/listinfo/vnc-tight-list > > -- > -- > James Weatherall - Chief Scientist > RealVNC Ltd - http://www.realvnc.com ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___________________________________________________________ TightVNC mailing list, VNC-Tight-list@... 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