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Open a firewall hole for Connect to Server System
I enabled the built-in firewall using Brickhouse on my G4 Cube and PowerBook. They both connect to an Airport which connects via cable to a DSL modem for the Internet. After enabling the firewall, I found that the Connect to Server function would not work.

Using Brickhouse's log function I found the port which is used to set up the connection. I then added an Allow filter which allows TCP traffic from 10.0.1.2 through 10.0.1.9 to my computer on port 548. Bingo! Connect to Server works again!

Note that I can be specific about the ports because the maximum number of machines served by the Airport is 4. However, they use DHCP to get their IP addresses so allowing between 2 and 9 is fine.
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List of ports
Authored by: jonesy on May 13, '02 01:42:39PM

Apple has a list of used ports for their services here:

http://docs.info.apple.com/article.html?artnum=106439

And a full list of ports from iana:

http://www.iana.org/assignments/port-numbers



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Other AFP related ports to allow
Authored by: bwarren on May 15, '02 06:26:31PM

Ther's also the port 427 to allow your machine to show up in another box's "connect to" window.

I can't recall if it's TCP or UDP, but I would suspect UDP



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Firewall & Airport Base Stations
Authored by: mrgerbek on Jul 08, '02 08:22:19PM

Another related bit regarding firewall's and the Airport Base Station.

If you try to find the Base Station with the Airport Base Station Configurator, you'll find it misssing. If you disable your firewall temporarily, you can find the base station, make your changes, and re-enable the firewall.

I thought it was a problem with the newer airport drivers for some time. I had to use my wife's OS 9 iBook to change port mappings.



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