bug after connection

James Weatherall jnw "at" realvnc.com
Wed Nov 23 16:44:00 2005


Vadim,

It sounds like your server computer has some firewall software running that
has screwed up the TCP stack.

Cheers,

Wez @ RealVNC Ltd.
 

> -----Original Message-----
> From: vnc-list-admin "at" realvnc.com 
> [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of Vadim Goncharov
> Sent: 23 November 2005 13:37
> To: vnc-list "at" realvnc.com
> Subject: bug after connection
> 
> Hello vnc-list,
> 
> I have strange problem when connecting to my home machine with Windows
> viewer (tried viewer both 4.1 & 4.1.1, server both 4.1 & 4.1.1 in all
> combinations, same result), server on win2k prof SP2, viewer 
> on both w2k
> and XP
> 
> So, here is the problem. Immediately after pushing connect button
> viewer completely hides from screen - even doesn't ask for password.
> Server shows no connection, though TCP is really connected. After
> secondary client connection server stops responding. If I kill server,
> client shows it's window about termination, offering reconnect.
> 
> I've captured beginning of TCP session - after a few packets exchange
> completely stops until killing server or client. Here they are:
>   
> E:\InetProg\WinDump\WinDump.exe: listening on 
> \Device\NPF_{284BD351-AAD5-4783-86
> D7-263650F93A02}
> 15:19:17.817196 IP lukyan.4901 > nuclight.5900: S 
> 2763090736:2763090736(0)
> win 65535 <mss 1460,nop,nop,sackOK>
>         0x0000:  4500 0030 8200 4000 8006 52e3 5275 408f  
> E..0.. "at" ...R.Ru@.
>         0x0010:  5275 406b 1325 170c a4b1 6b30 0000 0000  
> Ru "at" k.%....k0....
>         0x0020:  7002 ffff 2328 0000 0204 05b4 0101 0402  
> p...#(..........
> 15:19:17.818753 IP nuclight.5900 > lukyan.4901: S 974747752:97474775
> 2(0) ack 2763090737 win 17520 <mss 1460,nop,nop,sackOK>
>         0x0000:  4500 0030 f2d6 4000 8006 e20c 5275 406b  
> E..0.. "at" .....Ru@k
>         0x0010:  5275 408f 170c 1325 3a19 7868 a4b1 6b31  
> Ru "at" ....%:.xh..k1
>         0x0020:  7012 4470 2c25 0000 0204 05b4 0101 0402  
> p.Dp,%..........
> 15:19:17.819119 IP lukyan.4901 > nuclight.5900: . ack 1 win 65535
>         0x0000:  4500 0028 8201 4000 8006 52ea 5275 408f  
> E..(.. "at" ...R.Ru@.
>         0x0010:  5275 406b 1325 170c a4b1 6b31 3a19 7869  
> Ru "at" k.%....k1:.xi
>         0x0020:  5010 ffff 9d59 0000 0000 0000 0000       
> P....Y........
> 15:19:17.839242 IP nuclight.5900 > lukyan.4901: P 1:13(12) 
> ack 1 win 17520
>         0x0000:  4500 0034 f2d7 4000 8006 e207 5275 406b  
> E..4.. "at" .....Ru@k
>         0x0010:  5275 408f 170c 1325 3a19 7869 a4b1 6b31  
> Ru "at" ....%:.xi..k1
>         0x0020:  5018 4470 f8d5 0000 5246 4220 3030 332e  
> P.Dp....RFB.003.
>         0x0030:  3030 380a                                008.
> 15:19:17.839970 IP lukyan.4901 > nuclight.5900: P 1:13(12) 
> ack 13 win 65523
>         0x0000:  4500 0034 8202 4000 8006 52dd 5275 408f  
> E..4.. "at" ...R.Ru@.
>         0x0010:  5275 406b 1325 170c a4b1 6b31 3a19 7875  
> Ru "at" k.%....k1:.xu
>         0x0020:  5018 fff3 3d46 0000 5246 4220 3030 332e  
> P...=F..RFB.003.
>         0x0030:  3030 380a                                008.
> 15:19:17.841380 IP nuclight.5900 > lukyan.4901: P 13:15(2) 
> ack 13 win 17508
>         0x0000:  4500 002a f2d8 4000 8006 e210 5275 406b  
> E..*.. "at" .....Ru@k
>         0x0010:  5275 408f 170c 1325 3a19 7875 a4b1 6b3d  
> Ru "at" ....%:.xu..k=
>         0x0020:  5018 4464 57d1 0000 0102                 P.DdW.....
> 15:19:17.841829 IP lukyan.4901 > nuclight.5900: P 13:14(1) 
> ack 15 win 65521
>         0x0000:  4500 0029 8203 4000 8006 52e7 5275 408f  
> E..).. "at" ...R.Ru@.
>         0x0010:  5275 406b 1325 170c a4b1 6b3d 3a19 7877  
> Ru "at" k.%....k=:.xw
>         0x0020:  5018 fff1 9b44 0000 0200 0000 0000       
> P....D........
> 15:19:17.992372 IP nuclight.5900 > lukyan.4901: . ack 14 win 17507
>         0x0000:  4500 0028 f2d9 4000 8006 e211 5275 406b  
> E..(.. "at" .....Ru@k
>         0x0010:  5275 408f 170c 1325 3a19 7877 a4b1 6b3e  
> Ru "at" ....%:.xw..k>
>         0x0020:  5010 4463 58db 0000                      P.DcX...
> 
> -- 
> Best regards,
>  Vadim Goncharov   ICQ UIN 166852181   mailto:vadim_nuclight "at" mail.ru
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