F5 LTM One Arm and SNAT

tcpdump is your friend. Verify that your VS is set to perform SNAT and that the pool is set to ALLOW SNAT.

Then setup a tcpdump to look at the traffic both between the client & VS, and between the SNAT address and the poolmembers. If you do that to a file (-w & -s options) you can then have a look at the tcp level information, AND the contents of the traffic (Assuming it's either HTTP or you have access to the keys to decrypt).

Verify that when you make a connection from the client to the VS you get clean tcp connection. And see the request come in. And for the snat to poolmember connection you see the connection opened and the request go out. Then verify the respinses that come back as well).

Also verify any errors in /var/log/ltm if you have iRules configured for example.

H