Messages in this thread |  | | From | Jon Tombs <> | Subject | TCP tunnel and forwarder broken since pre 1.99.10 | Date | Sun, 9 Jun 1996 02:53:48 +0200 (MET DST) |
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Hi, I'm using a somewhat strange setup, which I first configured with 1.99.9, where it worked perfectly. The setup is this.
The network 194.224.147.64 netmask 255.255.255.252 (I only have two machines at home .65 and .66 .65 has the modem), is officialy gatewayed by the machine 194.224.147.2
In 194.224.147.2 the network is IP tunneled to my ppp dialin address. On my dial in machine I have a tunnel to 194.224.147.3 routed through my modem and my default route is set to 194.224.147.3 via the tunnel.
In 1.99.9 this all worked fine. Since 1.99.10 THe gateway machine still works fine, but the second machine can only transfer so much before a connection hangs. This is 100% repeatable. If I telnet to my news server, type list the output always stops at the same place (after transfering 36227bytes).
Once a connection has stopped, it appears that both ends just loose interest, netstat shows both ends in the established state with nothing in the send/recv queues on either end. The last bytes to pass the ppp link according to tcpdump were:
02:29:06.682247 0.0.192.202 > 36.97.8.0: ip-proto-196 500 02:29:06.682247 0.0.192.202 > 36.97.8.0: ip-proto-196 500 02:29:07.082247 pi.sitrantor.es.1068 > trantor.sitrantor.es.nntp: . ack 36418 win 31744 (encap) 02:29:07.502247 0.0.192.202 > 36.97.8.0: ip-proto-196 500 02:29:07.502247 0.0.192.202 > 36.97.8.0: ip-proto-196 500 02:29:07.902247 pi.sitrantor.es.1068 > trantor.sitrantor.es.nntp: . ack 36878 win 31744 (encap)
The problem seems to be only in the gateway machine. With 1.99.9 running in that machine the setup works, with 1.99.10 it is stops. 1.99.10 changed several things related to acks and such, it would appear one of these breaks IP tunnels. As this is 100% reproducable and I can tcpdump any part of the chain, I would like advice on finding out why it broke.
-- Jon. <jon@gte.esi.us.es, http://www.esi.us.es/~jon>
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