This is a firewall problem. Disable your Windows Firewall and use a hardware firewall. When I switched to Smoothwall, this problem disappeared together with other problems. Especially the more recent release of Windows and MCE definitely is a recent release. My problem was with 2K3
On 5/3/06, S B <[EMAIL PROTECTED]> wrote: > > Hi, > > FYI: I observed that this problem occurs only when the "colour level" is > "Full", when set to "Medium" it has not occured the entire day yesterday > (whereas with "colour level" set to "Full" it used to freeze atleast 2-3 > times a day). > > Regards, > - Sudhin. > > On 5/2/06, Alex Pelts <[EMAIL PROTECTED]> wrote: > > > > The exact step is to match MTU of your VPN to MTU of your physical > > network. Unfortunately there are no automated tools. Safe way is to make > > your VPN MTU 1300, which is smaller than an average physical network > MTU. > > > > Regards, > > Alex > > > > > > S B wrote: > > > Alex, > > > > > > On 4/26/06, Alex Pelts <[EMAIL PROTECTED]> wrote: > > >> James, > > >> I am not trying to ask help on the forum. I am just telling what I > > >> observed and how I fixed it. My VPN software made by cisco and I > think > > >> ... > > > > > > it. I will be happy to provide more details if you want them. > > > > > > > > > Could please provide me more details about what were the exact steps > you > > > took to fix the problem? > > > > > > My company uses Junipter Networks' Secure application manager, I will > > let > > > our admin know what you did so that he can apply similar fix to our > VPN. > > > > > > Thanks, > > > - Sudhin. > > > > > > > > > Regards, > > >> Alex > > >> > > >> > > >> James Weatherall wrote: > > >>> Hi Alex, > > >>> > > >>> Yes, TCP sends packets, but VNC doesn't - VNC sends a stream of > bytes > > >> and > > >>> the TCP stack is then responsible for splitting that stream into a > > >> sequence > > >>> of packets of an appropriate size for the underlying network. > > >>> > > >>> The problems you're seeing are most likely caused by faulty VPN > > software > > >> not > > >>> indicating the MTU correctly to the two ends of the connection, > > >> resulting in > > >>> TCP splitting the data stream into chunks that are too large for the > > >> VPN. > > >>> Your best bet is therefore to contact your VPN vendor for support > for > > >> their > > >>> product. > > >>> > > >>> Cheers, > > >>> > > >>> Wez @ RealVNC Ltd. > > >>> > > >>> > > >>> > > >>>> -----Original Message----- > > >>>> From: Alex Pelts [mailto:[EMAIL PROTECTED] > > >>>> Sent: 26 April 2006 16:50 > > >>>> To: James Weatherall > > >>>> Cc: 'S B'; [email protected] > > >>>> Subject: Re: VNC freezing on Win XP Media Center Edition SP2 > > >>>> > > >>>> Well tcp stack sends packets. It all has to do with the single > write > > >>>> length that most likely goes out as a packet. If the write is > > >>>> large it > > >>>> will fill one or more full vpn packets that can't be > > >>>> fragmented and will > > >>>> be dropped. You can try it yourself. To tell you the truth I am not > a > > >>>> TCP expert so I cant tell you the exact reason. I am sure that if > you > > >>>> run ethereal you can find some clues rather quickly. > > >>>> > > >>>> All I know that lowering MTU on my VPN interface fixed these > > problems. > > >>>> > > >>>> Regards, > > >>>> Alex > > >>>> > > >>>> > > >>>> James Weatherall wrote: > > >>>>> Hi Alex, > > >>>>> > > >>>>> VNC doesn't send packets at all - it runs over TCP. > > >>>>> > > >>>>> Cheers, > > >>>>> > > >>>>> Wez @ RealVNC Ltd. > > >>>>> > > >>>>> > > >>>>>> -----Original Message----- > > >>>>>> From: [EMAIL PROTECTED] > > >>>>>> [mailto:[EMAIL PROTECTED] On Behalf Of Alex Pelts > > >>>>>> Sent: 25 April 2006 19:14 > > >>>>>> To: James Weatherall > > >>>>>> Cc: 'S B'; [email protected] > > >>>>>> Subject: Re: VNC freezing on Win XP Media Center Edition SP2 > > >>>>>> > > >>>>>> The VPN has MTU larger than MTU of physical network. Lots of > > >>>>>> packets are > > >>>>>> dropped as somehow VNC sends rather large packets. I had > > >>>> this problem > > >>>>>> myself until I lowered MTU to below of the physical network MTU. > > >>>>>> > > >>>>>> The symptoms were: > > >>>>>> 1. screen would render half way and then stop. > > >>>>>> 2. screen updates were extremely slow > > >>>>>> 3. Connection would go for some short time and then would > > >>>> be dropped. > > >>>>>> I am not sure why MTU is causing that effect. I think that > > >>>>>> VPN packets > > >>>>>> can not be fragmented so they are dropped and there is a > > >>>> large packet > > >>>>>> loss. I am not sure how VNC reacts to large packet loss. > > >>>>>> > > >>>>>> Regards, > > >>>>>> Alex > > >>>>>> > > >>>>>> > > >>>>>> James Weatherall wrote: > > >>>>>>> Hi Alex, > > >>>>>>> > > >>>>>>> Can you provide any more information on why that causes the > > >>>>>> effect SB is > > >>>>>>> seeing? > > >>>>>>> > > >>>>>>> Cheers, > > >>>>>>> > > >>>>>>> Wez @ RealVNC Ltd. > > >>>>>>> > > >>>>>>> > > >>>>>>>> -----Original Message----- > > >>>>>>>> From: [EMAIL PROTECTED] > > >>>>>>>> [mailto:[EMAIL PROTECTED] On Behalf Of Alex Pelts > > >>>>>>>> Sent: 25 April 2006 07:07 > > >>>>>>>> To: S B > > >>>>>>>> Cc: [email protected] > > >>>>>>>> Subject: Re: VNC freezing on Win XP Media Center Edition SP2 > > >>>>>>>> > > >>>>>>>> MTU is too large on your vpn connection. > > >>>>>>>> > > >>>>>>>> Regards, > > >>>>>>>> Alex > > >>>>>>>> > > >>>>>>>> > > >>>>>>>> S B wrote: > > >>>>>>>>> Hi, > > >>>>>>>>> > > >>>>>>>>> I just bought a new computer from Dell (Intel dual core > > >>>>>>>> 2.8GHz, 1GB RAM > > >>>>>>>>> running Win XP Media Center w/ SP2), and downloaded VNC 4.4 > > >>>>>>>> viewer on it. > > >>>>>>>>> When I VNC to my work machine, VNC viewer freezes > > >>>>>>>> intermittently. Some times > > >>>>>>>>> immediately after logging in and some times after 10-15 > > >>>>>>>> minutes of work. Did > > >>>>>>>>> anyone here faced a similar problem? How do I fix this > problem. > > >>>>>>>>> > > >>>>>>>>> Thanks, > > >>>>>>>>> - SB > > >>>>>>>>> _______________________________________________ > > >>>>>>>>> VNC-List mailing list > > >>>>>>>>> [email protected] > > >>>>>>>>> To remove yourself from the list visit: > > >>>>>>>>> http://www.realvnc.com/mailman/listinfo/vnc-list > > >>>>>>>> _______________________________________________ > > >>>>>>>> VNC-List mailing list > > >>>>>>>> [email protected] > > >>>>>>>> To remove yourself from the list visit: > > >>>>>>>> http://www.realvnc.com/mailman/listinfo/vnc-list > > >>>>>>> _______________________________________________ > > >>>>>>> VNC-List mailing list > > >>>>>>> [email protected] > > >>>>>>> To remove yourself from the list visit: > > >>>>>>> http://www.realvnc.com/mailman/listinfo/vnc-list > > >>>>>> _______________________________________________ > > >>>>>> VNC-List mailing list > > >>>>>> [email protected] > > >>>>>> To remove yourself from the list visit: > > >>>>>> http://www.realvnc.com/mailman/listinfo/vnc-list > > >>>>> _______________________________________________ > > >>>>> VNC-List mailing list > > >>>>> [email protected] > > >>>>> To remove yourself from the list visit: > > >>>>> http://www.realvnc.com/mailman/listinfo/vnc-list > > > _______________________________________________ > > > VNC-List mailing list > > > [email protected] > > > To remove yourself from the list visit: > > > http://www.realvnc.com/mailman/listinfo/vnc-list > _______________________________________________ > VNC-List mailing list > [email protected] > To remove yourself from the list visit: > http://www.realvnc.com/mailman/listinfo/vnc-list > -- {Celia} _______________________________________________ VNC-List mailing list [email protected] To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
