For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Mayank_Shukla's avatar
Mayank_Shukla
Icon for Altostratus rankAltostratus
Jul 23, 2022

iquery source IP on BIG IP DNS

Hi What is the source IP used by BIG IP DNS ( management IP or listerner IP ) to establish an iquery session with LTM. Need clarity on what source/destination IP and port combinations should be exp...
application delivery
BIGIP DNS
chrros95's avatar
chrros95
Icon for Altostratus rankAltostratus
Jul 25, 2022

As far as I know, the Big-IP will use a non-floating Self-IP given by the default routing table.

You can discover the source address by using the ip command. In the following example the self ip 10.10.10.254 will be the source for the iquery-target 10.2.2.2.

[admin@bigip-dns:Active:Standalone] ~ # ip route get 10.2.2.2
10.2.2.2 via 10.10.10.1 dev arm0 src 10.10.10.254
    cache