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Godswill's avatar
Godswill
Icon for Nimbostratus rankNimbostratus
Mar 24, 2020

How to setup health monitor for SMTPS (port 587) on F5 LTM

Please I will appreciate any help on how to setup a custom monitor on the F5 for secure SMTP  server.  I am trying to setup health monitor for our new mail server that is required to secure communica...
BIG-IP
LTM
security
Shaun_Simmons's avatar
Shaun_Simmons
Icon for Employee rankEmployee
Mar 25, 2020

What were your troubleshooting steps?

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From the Active BIGIP, to verify routing:

-Are you able to successfully ping the SMTP server?

-Did you try a "port knock" test via the telnet command on port 25 and 587, to ensure routing and the port is open on the SMTP server?

-Do you have a SELFIP on the same subnet & VLAN as the SMTP server and/or a Default Route configured?

  • Godswill's avatar
    Godswill
    Icon for Nimbostratus rankNimbostratus
    Mar 25, 2020

    Yes, there are communication between the F5 and the servers. the pools comes up with TCP or ICMP and etc but not with TCP port 587. The virtual server has being working fine on port 25 until a new requirement for secure communication between the F5 and the servers. The servers are lsiten on secure SMTP. My objective is to setup secured SMTP virtual server for the servers and to enable secure end to end communication. I am not sure if the F5 virtual server will actual work without the health monitor being port 587. I having problem setting up custom health monitor with TCP port 587 and that is what I am requesting for help for anyone who know how to setup secured SMTP virtual server and health monitor.