Bug ID 2252401: "Limiting closed port RST response from 251 to 250 packets/sec" displayed for RST flood without outgoing RST packets.

Last Modified: Mar 30, 2026

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

Known Affected Versions:
17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3, 17.1.3.1, 17.5.1.4, 17.5.1.5

Opened: Mar 20, 2026

Severity: 4-Minor

Symptoms

During a RST flood, BIG-IP displays the log message "Limiting closed port RST response from 251 to 250 packets/sec" even though no outgoing RST packets are sent in response.

Impact

Incorrect log message "Limiting closed port RST response from 251 to 250 packets/sec".

Conditions

- BIG-IP Virtual Server listening on specific port e.g. 10.1.1.1:443 - BIG-IP receives a RST flood on the Virtual Server IP address and an unused port e.g. 10.1.1.1:9999 - Incoming RST flood does not match any listener

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips