Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Mohammed_Moin_2's avatar
Mohammed_Moin_2
Icon for Nimbostratus rankNimbostratus
Oct 15, 2018

Securing GTM iQuery port 4353

F5 GTM uses TCP 4353 for iQuery between two GTM across the Data Center. Is there a way to secure this communication either by using encrypted iQuery OR can we configure the policy in GTM to restrict ...
application delivery
BIG-IP DNS
Jeff_Giroux's avatar
Jeff_Giroux
Icon for Cirrus rankCirrus
Oct 15, 2018

iQuery is already encrypted. As for ACL, this is better suited for the AFM add-on license which then allows you to place an L3/L4 firewall policy in the management interface as well as the self IPs.