Joe, It sounds like the VPN is reducing the maximum packet size of the connection between the corporate office and the client site, but that your VPN is not correctly configuring Windows to know about the reduced maximum packet size, and is simply dropping packets that exceed that size, leading to a black-screen in VNC Viewer and a connection reset.
The two ways to fix this are to: 1) Get a VPN implementation that will configure Windows correctly for the reduced maximum packet size. 2) Configure your VPN not to drop packets that are too big, but instead to fragment them. Regards, Wez @ RealVNC Ltd. > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Joe Stanton > Sent: 29 December 2005 18:39 > To: vnc-list@realvnc.com > Subject: Painful networking situation - Connection Reset By Peer > > Hello, this is my first post... > > I have been using the VNC Viewer for quite some time with no problems. > Recently problems have popped up. It's hard to do anything > but list the > facts, so pelase bear with me: > > Scenario 1: > * Laptop computer > * Running from home office on DSL > * Connect to remote Client A site via secure Cisco VPN 3.6.4 > * Connect to machine on client network running VNC server > * Everything works perfectly. > > Scenario 2: > * Same laptop computer > * Running from corporate office > * Connect to remote Client A site via secure Cisco VPN 3.6.4 > * Connect to machine on client network running VNC server > * Black screen inside VNC window, followed by "connection > reset by peer" > > Scenario 3: > * Co-worker desktop computer > * Running from corporate office > * Connect to remote Client A site via secure Cisco VPN 3.6.4 > * Connect to machine on client network running VNC server > * Everything works perfectly > * NOTE: Same version of VPN software and VNC client as in > scenarios 1 and 2 > > I have tried swapping my network cable to the port that my > coworker uses, > still same results as in scenario 2. > > Scenario 2 used to succeed 100% of the time. Only change I > can think of was > that I updated the Cisco VPN software for client B to 4.x due > to requirements > of their network, then uninstalled it and reinstalled the > version of Cisco CPN > software that Client A requires. Note that I can access all > other Client A > network resources such as Oracle databases, and even can > explore to shared > folders on the same machine that I cannot connect to via VNC. > > Any suggestions? I am pretty much at my wits end on this one. > > Thank you, > Joe Stanton > _______________________________________________ > VNC-List mailing list > VNC-List@realvnc.com > To remove yourself from the list visit: > http://www.realvnc.com/mailman/listinfo/vnc-list _______________________________________________ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
