Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.5.0, 11.5.1
Fixed In:
11.5.2
Opened: Oct 07, 2014 Severity: 3-Major Related Article:
K16890
The BIG-IP system might use 0 (zero) as the TCP source port for server-side flows.
Many network stacks use 0 as reserved port and do not treat the value as valid for TCP source ports. This might cause TCP ports to be reused too quickly.
This occurs when the server-side VLAN's cmp_hash is either src-ip or dst-ip (the default value is 'default') and the server-side source_port mode is set to change.
None
The BIG-IP system no longer uses 0 (zero) as the TCP source port for server-side flows, so TCP ports are not reused too quickly.