Bug ID 1691349: ICMP echo requests dropped through virtual server

Last Modified: Jun 19, 2025

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

Known Affected Versions:
17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2

Opened: Oct 07, 2024

Severity: 3-Major

Symptoms

ICMP echo request(s) sent through virtual may be dropped and ICMP destination admin prohibited response to ICMP echo response on server side of the flow.

Impact

This may cause misreporting for tools that use ICMP such as ping and traceroute.

Conditions

-- A virtual server is configured with a security policy that performs NAT translation -- The virtual server is configured to forward ICMP (e.g., network forwarding virtual). -- Multiple ICMP echo requests are sent using the same ICMP ID.

Workaround

Create an ICMP specific virtual that does not use security policy. If address translation is required, SNAT can be configured on the virtual server. For traceroute that support the -N / --sim-queries, this can be set to 1.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips