Forum Discussion

sdavids5670_166's avatar
sdavids5670_166
Icon for Nimbostratus rankNimbostratus
Aug 07, 2014

Health check failing - tcp/54321 - is this more than a coincidence?

We are rolling out a new web application in a couple of weeks and the developers have noticed issues with the application that are very intermittent and difficult to quantify. Testers have reported ...
Jason_Adams_124's avatar
Jason_Adams_124
Historic F5 Account
Dec 10, 2014
The scope of this bug has been increased to include the following: 11.5.0 Release Notes Known Issue https://support.f5.com/kb/en-us/products/big-ip_ltm/releasenotes/product/relnote-ltm-11-5-0.htmlrn_ki 11.5.1 Release Notes Known Issue 11.6.0 Release Notes Known Issue https://support.f5.com/kb/en-us/products/big-ip_ltm/releasenotes/product/relnote-ltm-11-6-0.htmlrn_ki Known-Issue Solution Article: SOL15907: The BIG-IP system may incorrectly send an ICMP destination unreachable message to a server responding to health monitor traffic on TCP source port 54321 - https://support.f5.com/kb/en-us/solutions/public/15000/900/sol15907.html
JG's avatar
JG
Icon for Cumulonimbus rankCumulonimbus
Dec 10, 2014
SOL15907: "This issue occurs because the default iptables rules on the BIG-IP system contain a rule that is configured to protect a BIG-IP APM service listening on TCP port 54321, even though APM or SWG is not provisioned." Does this mean if the system has APM provisioned it is not affected?