Known Issue: 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

(SOL15907) Description The BIG-IP system may incorrectly send an ICMP destination unreachable message to a server that is responding to health monitor traffic. This issue occurs when the following condition is met: The bigd process uses TCP port 54321 as its source port to send the health monitor to the server. 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 n