In this session of A Few Easy Steps, we will be Disabling NAT ALG for DNS on
a Cisco Router.

Session Prerequisites:

• You have terminal or console access to your Cisco device.

Session Assumptions:

• You have NAT Enabled
• You do not need ALG to re-write DNS payloads to account for NAT

Our goals of this session are:

• Disable NAT ALG for DNS

Disable NAT ALG for DNS

!
conf t
!
no ip nat service alg tcp dns
!
no ip nat service alg udp dns
!
end
!
copy running-config startup-config

 

Find out more about NAT ALG for DNS here.

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