The default is 6346. If it (mystically?) changed to another port, wether 6348, 6384 or 65468765413241blahblah, it makes (virtually) no difference as long as you can connect.
So, the real question is, can you connect?

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

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And seal your fate forever
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The Golden Age Of Leather"
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