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

Forum Discussion

Preet_pk's avatar
Preet_pk
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Jan 17, 2022

GTM - Multiple name server

Hi,   We have GTM deployed as name servers in both DC & DR - in at any point of time if name server in DR is not reachable, what will happening to the dns queries that are initiated from external...
big-ip
BIG-IP DNS
security
DevBabu's avatar
DevBabu
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Jan 28, 2022

In short, the external user DNS resolver should try to reach ns1.test.ae to resolve DNS query. 

When DNS query sent by a DNS client to a DNS server is down, the DNS client times out. Once it times out, it will reach out to one of the other name servers listed in zone. That's why we require at least minimum of two DNS Name Servers.