Bug ID 470171: CGNAT TFTP does not work if lsn-pool inbound connections are disabled

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.0.0

Opened: Jul 02, 2014

Severity: 3-Major

Related Article: K50565863

Symptoms

If the LSN pool's inbound entries are enabled then, the TFTP server can respond back to the client on the client's ephemeral port.

Impact

This issue prevents the server from responding to the client.

Conditions

This issue occurs when the LSN pool's inbound connections are disabled.

Workaround

To work around this issue, enable inbound connections for the lsn-pool.

Fix Information

TFTP-ALG is supported for CGNAT with all inbound setting modes.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips