Steve_Carroll_1
Dec 04, 2014Nimbostratus
Why is my F5 dropping telnet on port 25 for one network?
I have configured SMTP on my LTM (11.4.1) and have configured a SNAT of 10.229.104.37 so all connections from the LTM are sent with this address and I have no iRule configured.
If telnet 10.229.103.37 25 is sent from addresses in 10.229.0.0 network the connection is passed through to the single SMTP server. This is also confirmed by the tcpdump output.
However, if I send the same telnet request from an external subnet the F5 drops the connection. As for the tcpdump I only see incoming request to the VIP.
Can anyone help?