Can't join most servers.

[Trogtor]

I usually like to meet up with my friends on servers and do things. But some of the servers with "---" I can't join. Yeah I know, it has no ping and I shouldn't be able to join, but everyone else can get in without any trouble.
And yeah

Every time I try to join some server, the window pops up with.

Connecting to [IP here]
Sending Punch Packet...
Sending Punch Packet...
Sending Punch Packet...
Sending Challenge Request...

Usually in a split second all of this pops up and I am able to join.

But a second later..

Connecting to [IP here]
Sending Punch Packet...
Sending Punch Packet...
Sending Punch Packet...
Sending Challenge Request...
Sending Challenge Request...

It says that again and I know for sure I am not able to join.

So if I let it sit and load it shows this completely.

Connecting to [IP here]
Sending Punch Packet...
Sending Punch Packet...
Sending Punch Packet...
Sending Challenge Request...
Sending Challenge Request...
Sending Challenge Request...
Sending Challenge Request...
Sending Challenge Request...
Request Timed Out.

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[Trogtor]

No edit: Is there anything that might be wrong with my router or something that causes this? Like something is blocking connection?

[Goth77]

Try checking your firewall settings and allow for both public and private. This way, you can connect to IP addresses

If that doesn't work try re-installing bl or updating some network drivers.