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TCPdump

TCPdump is availble.

Review if wan0 and lan0 interfaces were configured correctly. A command-line tcpdump -i wan0 is available.

Example of SSH traffic on wan0

root@wanos:~# tcpdump -i wan0
tcpdump: WARNING: lan0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lan0, link-type EN10MB (Ethernet), capture size 65535 bytes
05:12:15.593858 IP 192.168.5.2.ssh > 192.168.5.254.63976: Flags [P.], seq 1361930306:1361930418, ack 4233858220, win 1165, length 112
05:12:15.594880 IP 192.168.5.254.63976 > 192.168.5.2.ssh: Flags [.], ack 112, win 13235, length 0
05:12:15.595633 IP 192.168.5.2.ssh > 192.168.5.254.63976: Flags [P.], seq 112:320, ack 1, win 1165, length 208

 

We can check if we are sending probes in TCP Options header.

root@wanos:~# tcpdump -i wan0 -X | grep "0x7a69"

 

If we can see any packets:

root@wanos:~# tcpdump -i wan0 -X | grep mss | grep 0x7a69
tcpdump: WARNING: wan0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wan0, link-type EN10MB (Ethernet), capture size 65535 bytes
23:30:37.152005 IP wanos.org.http > 192.168.100.13.52610: Flags [S.], seq 83722653, ack 3204888463, win 14600, options [mss 1320,nop,wscale 8,unknown-76 0x7a69], length 0

 

Use Wireshark to dump traffic and do thorough examination in the log file.

tcpdump -i wan0 -s 0 -w dump.pcap

 

For SYN TCP packet check the “Riverbed probe” options.

Now that we know that peer discovery probes are being sent we can verify the logs. Switch from Informational to Debug and check for Peer Alive messages.

Log Location

 

In WCM

Device > Diagnostics > Logging

Local Web User Interface

Diagnostics > Logging

device-configure-systemsettings-systemsettings-loglevel
Screenshot of the Log level settings page in WCM. Navigate to Device > Configure > System Settings > System settings

 

System Settings Loglevel
Screenshot of the Log level settings in Local User Web Interface. Navigate to Configure > System Settings > System Settings



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