[pptp-server] neibourhood network problem ...

Jean-Paul Chavant chavant at geosys.fr
Tue Oct 3 10:30:17 CDT 2000


hello,

My VPN connexion works very well. BUT, when i browse the network from my
client with the neibourhood network i see only me (the client) (RQ : i see
only one time all the computer in the window. after deconnecting and re
connecting i see nothing ...). When i execute \\computer_name, a windows is
openned and i see shares (but the computer doesn't appears in the
neibourhood network window ...).

I ve made a tcpdump on the ppp interface of the connection. here is the
result :

my client is 192.168.0.100
my server ppp is 192.168.0.1
my wins is 192.168.1.3 and 192.168.3.2

tcpdump: listening on ppp0
17:24:41.715057 192.168.0.100.netbios-dgm > 192.168.0.255.netbios-dgm: udp
177
17:24:41.715107 192.168.0.1 > 192.168.0.100: icmp: net 192.168.0.255
unreachable [tos 0xc0]
17:24:41.733422 192.168.0.100.netbios-dgm > 192.168.0.255.netbios-dgm: udp
177
17:24:41.733466 192.168.0.1 > 192.168.0.100: icmp: net 192.168.0.255
unreachable [tos 0xc0]
17:24:42.227152 192.168.0.100.netbios-dgm > 192.168.0.255.netbios-dgm: udp
177
17:24:42.227198 192.168.0.1 > 192.168.0.100: icmp: net 192.168.0.255
unreachable [tos 0xc0]
17:24:42.240954 192.168.0.100.netbios-dgm > 192.168.3.191.netbios-dgm: udp
177
17:24:42.734865 192.168.0.100.netbios-dgm > 192.168.0.255.netbios-dgm: udp
177
17:24:42.734926 192.168.0.1 > 192.168.0.100: icmp: net 192.168.0.255
unreachable [tos 0xc0]
17:24:42.748635 192.168.0.100.netbios-dgm > 192.168.3.191.netbios-dgm: udp
177
17:24:43.242621 192.168.0.100.netbios-dgm > 192.168.0.255.netbios-dgm: udp
177
17:24:43.242680 192.168.0.1 > 192.168.0.100: icmp: net 192.168.0.255
unreachable [tos 0xc0]
17:24:43.256246 192.168.0.100.netbios-dgm > 192.168.3.191.netbios-dgm: udp
177
17:24:43.750179 192.168.0.100.netbios-dgm > 192.168.0.255.netbios-dgm: udp
177
17:24:43.750238 192.168.0.1 > 192.168.0.100: icmp: net 192.168.0.255
unreachable [tos 0xc0]
17:24:43.764065 192.168.0.100.netbios-dgm > 192.168.3.191.netbios-dgm: udp
177
17:24:44.257925 192.168.0.100.netbios-dgm > 192.168.0.255.netbios-dgm: udp
200
17:24:44.257982 192.168.0.1 > 192.168.0.100: icmp: net 192.168.0.255
unreachable [tos 0xc0]
17:24:44.271527 192.168.0.100.netbios-ns > 192.168.3.2.netbios-ns: udp 50
17:24:44.272127 192.168.3.2.netbios-ns > 192.168.0.100.netbios-ns: udp 62
(DF)
17:24:44.286659 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: S
2250926:2250926(0) win 8192 <mss 1422,nop,wscale 0,nop,nop,timestamp 0
0,nop,nop,sackOK> (DF) [tos 0xb4]
17:24:44.287819 192.168.1.106.netbios-ssn > 192.168.0.100.1063: S
34150685:34150685(0) ack 2250927 win 8532 <mss 1460,nop,nop,sackOK> (DF)
17:24:44.298899 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: . ack 1 win
8532 (DF) [tos 0xb4]
17:24:44.311924 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: P 1:73(72)
ack 1 win 8532 (DF) [tos 0xb4]
17:24:44.312348 192.168.1.106.netbios-ssn > 192.168.0.100.1063: P 1:5(4) ack
73 win 8460 (DF)
17:24:44.449233 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: . ack 5 win
8528 (DF) [tos 0xb4]
17:24:45.012402 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: P
73:231(158) ack 5 win 8528 (DF) [tos 0xb4]
17:24:45.013063 192.168.1.106.netbios-ssn > 192.168.0.100.1063: P 5:86(81)
ack 231 win 8302 (DF)
17:24:45.027746 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: P
231:384(153) ack 86 win 8447 (DF) [tos 0xb4]
17:24:45.032217 192.168.1.106.netbios-ssn > 192.168.0.100.1063: P 86:142(56)
ack 384 win 8149 (DF)
17:24:45.040314 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: P
384:483(99) ack 142 win 8391 (DF) [tos 0xb4]
17:24:45.040911 192.168.1.106.netbios-ssn > 192.168.0.100.1063: P
142:252(110) ack 483 win 8050 (DF)
17:24:45.062483 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: P
483:582(99) ack 252 win 8281 (DF) [tos 0xb4]
17:24:45.063076 192.168.1.106.netbios-ssn > 192.168.0.100.1063: P
252:358(106) ack 582 win 7951 (DF)
17:24:45.082843 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: P
582:681(99) ack 358 win 8175 (DF) [tos 0xb4]
17:24:45.083406 192.168.1.106.netbios-ssn > 192.168.0.100.1063: P
358:468(110) ack 681 win 7852 (DF)
17:24:45.204080 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: . ack 468
win 8065 (DF) [tos 0xb4]
17:24:47.152517 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: P
681:720(39) ack 468 win 8065 (DF) [tos 0xb4]
17:24:47.152980 192.168.1.106.netbios-ssn > 192.168.0.100.1063: P
468:507(39) ack 720 win 7813 (DF)
17:24:47.166714 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: F 720:720(0)
ack 507 win 8026 (DF) [tos 0xb4]
17:24:47.167059 192.168.1.106.netbios-ssn > 192.168.0.100.1063: F 507:507(0)
ack 721 win 7813 (DF)
17:24:47.180298 192.168.0.100.1063 > 192.168.1.106.netbios-ssn: . ack 508
win 8026 (DF) [tos 0xb4]

46 packets received by filter
0 packets dropped by kernel


first : why my client ask for 192.168.3.191 ? this computer & IP doesn't
exist !!!

in the tcpdump whet does means the last number ?
17:24:43.764065 192.168.0.100.netbios-dgm > 192.168.3.191.netbios-dgm: udp
177

^^^

Why i have this error : 17:24:44.257982 192.168.0.1 > 192.168.0.100: icmp:
net 192.168.0.255 unreachable [tos 0xc0] ?

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

JPaul




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