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Andy-didnt-like-uucp's avatar
Aug 06, 2023

F5OS r2800 out-of-box DNS

Hi Guys
i'm a bit new to F5OS & need some help. i have fresh unpacked r2800 which i configured with 2 domestic DNSs only in RFC1918. But when i watch on tcpdump i can see chassis queries google DNSs along with domestic those:

12:20:21.423548 IP appliance-1.chassis.local.37917 > 8.8.8.8.domain: 48039+ AAAA? api.f5.com. (28)
12:20:21.423614 IP appliance-1.chassis.local.56070 > 8.8.8.8.domain: 17071+ A? api.f5.com. (28)
12:20:21.491076 IP appliance-1.chassis.local.56970 > <DOMESTIC-DNS>.domain: 48845+ PTR? 4.4.8.8.in-addr.arpa. (38)
12:20:25.423992 IP appliance-1.chassis.local.51778 > 8.8.4.4.domain: 17071+ A? api.f5.com. (28)
12:20:25.423992 IP appliance-1.chassis.local.57664 > 8.8.4.4.domain: 48039+ AAAA? api.f5.com. (28)

/etc/resolv.conf doesnt contain anything else except domestic DNSs. i'm a bit surprised... how can i disable querying google DNSs?

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