05-29-2012 08:51 AM
I noticed that our controllers (both master and locals) function as DNS servers. Is there any reason they do this by default? I'd like to turn it off, but I hear doing so requires a reboot of each controller, so I'm planning on putting an ACL on their inbound interfaces to block DNS. Just wanted to post and make sure there isn't some functionality I'm destroying by blocking udp 53. Thanks!
05-29-2012 10:39 AM
Does your DHCP server provide the IP address of the controller as the DNS server?
Client would not send DNS queries to the controller unless they are configured to do so.
Are your controllers acting as DHCP servers? If yes, then what IP address are configured under "dns-servers"? Also, please post the output of command
show ip dhcp database
02-10-2015 06:35 AM
can aruba controller act as DNS serveur or not ?!
ICT Network & Security Engineer
CCNP R/S | CCNA Security | ACMP|ACDX
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02-10-2015 07:13 AM - edited 02-10-2015 07:14 AM
Yes, if you have ip domain-lookup configured on the controller, and if you have a dns server defined on it, as well. (ip name-server x.x.x.x)
Aruba Customer Engineering
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