Forum Discussion

GeneUWG_150657's avatar
GeneUWG_150657
Icon for Nimbostratus rankNimbostratus
Jul 22, 2015

Routing udp syslog through F5 LTM without losing source IP

I am trying to figure out how to route udp syslog messages through my F5's without it modifying the source IP. I can get the messages through when I setup a "Standard" virtual server with Auto Map en...
application delivery
design
LTM
rsyslog
syslog
syslog-ng
Simon_Blakely's avatar
Simon_Blakely
Icon for Employee rankEmployee
Nov 20, 2017

I am having an issue understanding why UDP syslog packets are requiring SNAT - there is no reply packet for syslog, so nothing need to go back to the LTM/client.

 

Is there a firewall that is blocking packets that do not have the appropriate source address (i.e. an LTM address)?

 

Maybe you need a packet capture to see where the packets are going once they leave the LTM.