Bug ID 1555525: WCCP traffic may have its source port changed

Last Modified: Jun 04, 2024

Affected Product(s):
BIG-IP F5OS-A, LTM(all modules)

Known Affected Versions:
15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 16.1.4.2, 16.1.4.3, 17.1.1.2, 17.1.1.3

Opened: Mar 05, 2024

Severity: 3-Major

Symptoms

WCCP traffic may have its source port changed as it leaves the Linux host. This could cause WCCP sessions to not be established.

Impact

WCCP messages may not be successfully processed by the peer because the source port is not 2048.

Conditions

-- WCCP configured -- BIG-IP Virtual Edition platform or r2000 or r4000 tenants.

Workaround

Cat >> /config/tmm_init.tcl << EOF proxy BIGSELF { listen 0.0.0.0%\${rtdom_any} 2048 netmask 0.0.0.0 { proto \$ipproto(udp) srcport strict idle_timeout 30 transparent no_translate no_arp l2forward tap enable all protect } profile _bigself } EOF bigstart restart tmm

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips