On Mon, May 08, 2006 at 08:28:32AM +0000, Marco Berizzi wrote:
>
> [EMAIL PROTECTED]:~# ping 10.49.59.23
> PING 10.49.59.23 (10.49.59.23) 56(84) bytes of data.
> 64 bytes from 10.49.59.23: icmp_seq=1 ttl=247 time=91.9 ms
> 64 bytes from 10.49.59.23: icmp_seq=2 ttl=247 time=49.3 ms
> 64 bytes from 10.49.59.23: icmp_seq=3 ttl=247 time=106 ms
> 64 bytes from 10.49.59.23: icmp_seq=4 ttl=247 time=74.3 ms
> 
> --- 10.49.59.23 ping statistics ---
> 4 packets transmitted, 4 received, 0% packet loss, time 2998ms
> rtt min/avg/max/mdev = 49.316/80.460/106.257/21.241 ms
> [EMAIL PROTECTED]:~# cd /tmp/
> [EMAIL PROTECTED]:/tmp# tcpdump -v -p -n ip host 10.49.59.23 > 
> /tmp/NULL-10.49.59.23 &
> [1] 18981
> [EMAIL PROTECTED]:/tmp# tcpdump: listening on eth0, link-type EN10MB 
> (Ethernet), 
> capture size 96 bytes
> 
> [EMAIL PROTECTED]:/tmp# ping 10.49.59.23
> PING 10.49.59.23 (10.49.59.23) 56(84) bytes of data.
> 
> --- 10.49.59.23 ping statistics ---
> 8 packets transmitted, 0 received, 100% packet loss, time 6999ms
> 
> [EMAIL PROTECTED]:/tmp# fg
> tcpdump -v -p -n ip host 10.49.59.23 >/tmp/NULL-10.49.59.23
> 101 packets captured
> 101 packets received by filter
> 0 packets dropped by kernel

Yes this is really weird.  The only thing I can think of is that it
somehow managed to put some bogus entry into the conntrack table.
What happens if you do

grep 10.49.59.23 /proc/net/ip_conntrack

before and after the tcpdump?

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <[EMAIL PROTECTED]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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