Hi all :-)
I've openvpn server on debian 7 stable, 3 external side client (same os,
same kernel, etc.)
openvpn in configurated with tun0 and udp protocol
Only one client has a problem, sync some files but later goes down with:
connection reset by peer
ping -c10 -s 65507 ip losts enought packages, normal ping runs, other
services (http, etc.) run
on that client I already "tune" ethernet with ethtool (disable rx and tx,
etc) but I've same problem.
Other clients runs without problems.
Can somebody help me to investigate and solve the problem?
thanks!
Pol
tcpdump on the server show me that:
tcpdump: listening on tun0, link-type RAW (Raw IP), capture size 65535 bytes
13:03:18.677376 IP (tos 0x0, ttl 64, id 1756, offset 0, flags [DF], proto
TCP (6), length 60)
10.10.10.20.38671 > 10.10.10.8.873: Flags [S], cksum 0x0dd4 (correct),
seq 888472049, win 14600, options [mss 1368,sackOK,TS val 13109037 ecr
0,nop,wscale 4], length 0
13:03:18.677471 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP
(6), length 60)
10.10.10.8.873 > 10.10.10.20.38671: Flags [S.], cksum 0x285e
(incorrect -> 0x1305), seq 3026410577, ack 888472050, win 14480,
options [mss 1460,sackOK,TS val 300275775 ecr 13109037,nop,wscale 4],
length 0
13:03:18.758976 IP (tos 0x0, ttl 64, id 1757, offset 0, flags [DF], proto
TCP (6), length 52)
10.10.10.20.38671 > 10.10.10.8.873: Flags [.], cksum 0x76b8 (correct),
ack 3026410578, win 913, options [nop,nop,TS val 13109058 ecr
300275775], length 0
13:03:18.762387 IP (tos 0x0, ttl 64, id 1758, offset 0, flags [DF], proto
TCP (6), length 66)
10.10.10.20.38671 > 10.10.10.8.873: Flags [P.], cksum 0xd00d
(correct), seq 888472050:888472064, ack 3026410578, win 913, options
[nop,nop,TS val 13109058 ecr 300275775], length 14
13:03:18.762447 IP (tos 0x0, ttl 64, id 33798, offset 0, flags [DF], proto
TCP (6), length 52)
10.10.10.8.873 > 10.10.10.20.38671: Flags [.], cksum 0x2856 (incorrect
-> 0x769d), ack 888472064, win 905, options [nop,nop,TS val 300275796
ecr 13109058], length 0
13:03:20.602340 IP (tos 0x0, ttl 64, id 4040, offset 0, flags [DF], proto
TCP (6), length 64)
10.10.10.20.38667 > 10.10.10.8.873: Flags [F.], cksum 0x8128
(correct), seq 933656084, ack 849049340, win 2641, options [nop,nop,TS
val 13109520 ecr 300149890,nop,nop,sack 1 {849057476:849057532}],
length 0
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