Quick ? regardin permit / deny statement

[awagers]

If i just want to add one permit line for UDP packetsin an access-list such as:

access-list permit udp host 192.168.4.12 any eq dns

to allow dns requests to go out do i need to follow this up with a deny statement to block all other udp packets or are they still implicitly denied since there isn't a line to permit any other packets? Just a little confused on this still

Thanks in advance

[a.awan]

Anything not explicitly defined as permit will be denied including any other UDP packets. In short you need not follow your permit with an explicit deny.