Here's the response I received from PKR on this matter:
Quote:
These players will be using the Tiscali or Pipex ISP (or piggy backing off their connection with a different one).
This ISP restricts access to secure networks at certain times of day (they would have the same trouble accessing some multi player PC games too). They do this without ever telling their customers they have restricted access (the cheeky sods) and it is a common problem as they are one of the cheapest ISPs around so many people use them.
If you read this thread you should get all the info you need:
Tiscali Forums
The ISP can fix it, but they need to be told the user wants to and it can take a few days or even a week or two.
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Quote:
If anyone isn’t on Tiscali/Pipex or sister ISP then it is probably firewall ports
They should manually open:
51330 to 51339
52330 to 52339
58018
58019
This is TCP (not UDP)
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