SNAT based on mail domain in iRule

[Dennis_Schmidt]

Hi there,

I want to collect the SMTP traffic and read the mail from domain. Based on this domain I want to do a SNAT.

The actual problem is that I can't read the TCP Payload.

I've tested with unencrypted smtp traffic to the F5.

Any Ideas how to do that?

[Nikoolayy1]

You can see the links below with using either TCP::collect or a stream profile:

https://devcentral.f5.com/s/question/0D51T00006j2p4a/logging-smtp-traffic-info-via-hsl-to-remote-log-server

https://devcentral.f5.com/s/articles/smtp-proxy

https://devcentral.f5.com/s/question/0D51T00006j2p4Z/irule-for-smtp-passing-client-ip-addr-to-backend-mail-servers

[Dennis_Schmidt]

Thanks for your answer.

I've tried with the TCP::collect.

The problem is that we don't get any SMTP Data. HTTP and HTTPS works fine. But the variable is always empty when SMTP traffic is send.

Any Idea why the variable is emtpy?

Thanks in advance.

[Nikoolayy1]

See the stream options in:

https://devcentral.f5.com/s/question/0D71T000007a8ve/detail?s1oid=00D00000000hXqv&t=1625129872640&s1nid=0DB1T0000008Ony&emkind=chatterCommentNotification&s1uid=0051T000008eyBa&emtm=1625128385879&fromEmail=1&s1ext=0