Network problem - traffic not making it through!

Hello,

So, I've moved open vpn from a windows box to the slug and have a new
problem. I have two clients, an XP and a linux client. Before the move I
could ping both clients from the server, and both clients could ping the
server.

Now the slug is acting as a server, I can ping the XP client but not the
linux client. Both clients can ping the server.

Running tcpdump -i tap0 -n icmp it seems that the ping request is coming
back from the linux client but then gets swallowed somewhere.

I'm at my current limit on networking knowledge - can anyone help on
what I should look at now? I don't have iptables or any other firewall
that I'm running (AFAIK). I've also pasted the ps results in case I'm
missing something there.

Thanks - Bryan.

tcpdump: WARNING: tap0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol
decode
listening on tap0, link-type EN10MB (Ethernet), capture size 68 bytes
09:45:14.181503 IP 10.192.168.9 > 10.192.168.1: ICMP echo request, id
17719, seq 0, length 64
09:45:14.201809 IP 10.192.168.1 > 10.192.168.9: ICMP echo reply, id
17719, seq 0, length 64
09:45:15.158449 IP 10.192.168.9 > 10.192.168.1: ICMP echo request, id
17719, seq 1, length 64
09:45:15.181132 IP 10.192.168.1 > 10.192.168.9: ICMP echo reply, id
17719, seq 1, length 64
09:45:16.168513 IP 10.192.168.9 > 10.192.168.1: ICMP echo request, id
17719, seq 2, length 64
09:45:16.190803 IP 10.192.168.1 > 10.192.168.9: ICMP echo reply, id
17719, seq 2, length 64
09:45:19.208634 IP 10.192.168.9 > 10.192.168.5: ICMP echo request, id
17720, seq 0, length 64
09:45:19.344341 IP 10.192.168.5 > 10.192.168.9: ICMP echo reply, id
17720, seq 0, length 64
09:45:20.219029 IP 10.192.168.9 > 10.192.168.5: ICMP echo request, id
17720, seq 1, length 64
09:45:20.339420 IP 10.192.168.5 > 10.192.168.9: ICMP echo reply, id
17720, seq 1, length 64
09:45:21.229120 IP 10.192.168.9 > 10.192.168.5: ICMP echo request, id
17720, seq 2, length 64
09:45:21.359373 IP 10.192.168.5 > 10.192.168.9: ICMP echo reply, id
17720, seq 2, length 64

rootslug:/etc/openvpn$ <mailto:rootslug:/etc/openvpn$&gt; ps
PID Uid VmSize Stat Command
1 root 288 S init [3]
2 root SWN [ksoftirqd/0]
3 root SW< [events/0]
4 root SW< [khelper]
5 root SW< [kthread]
38 root SW< [kblockd/0]
41 root SW< [khubd]
56 root SW [pdflush]
57 root SW [pdflush]
58 root RW< [kswapd0]
59 root SW< [aio/0]
81 root SW [mtdblockd]
82 root SW [nftld]
167 root SW< [scsi_eh_0]
168 root SW< [usb-storage]
192 root SW< [kjournald]
238 root 360 S < udevd --daemon
596 root SW< [kjournald]
813 root 396 S /sbin/syslogd -n -O /var/log/messages -m 20
815 root 320 S /sbin/klogd -n
919 root 440 S /usr/sbin/sshd
944 root 332 S /usr/sbin/xinetd -pidfile /var/run/xinetd.pid
965 root 284 S /usr/sbin/cron
977 root SW< [cifsoplockd]
978 root SW< [cifsdnotifyd]
1007 root 232 S /sbin/getty 115200 ttyS0
3349 root 6660 S python /opt/pyTivo/pyTivo.py
6089 root SW [cifsd]
9142 root 1152 S /usr/sbin/nmbd -D
9143 root 2024 S /usr/sbin/smbd -D
9144 root 1216 S /usr/sbin/winbindd
9145 root 1532 S /usr/sbin/winbindd
9146 root 1596 S /usr/sbin/smbd -D
9150 root 1100 S /usr/sbin/winbindd
17384 root 1988 S sshd: rootpts/0 <mailto:rootpts/0>
17389 root 964 S -sh
17584 root 2004 S sshd: rootpts/1 <mailto:rootpts/1>
17588 root 852 S -sh
17706 root 2080 S /usr/sbin/openvpn --daemon --writepid
/var/run/openvp
17723 root 752 R ps

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