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Forums » The Site » Old Forums » Kerio - Tiny Support » BZ Kerio 2x Default Replacement Update
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BlitzenZeus
Burnt Out Cynic
Premium,MVM
join:2000-01-13
Beaverton, OR
·Verizon FIOS
·Verizon Online DSL

reply to jfahrner
Re: BZ Kerio 2x Default Replacement Update

Its rare to find it used on mail servers these days, more like outdated mail servers, and its mostly irc servers that still use this.

If anyone must allow this, only allow it from the servers that require it, and allowing it from any address will prevent you from being stealth, for those who care about it.
Inbound tcp Server.IP: Any -> Your.IP: 113

Remember this is a starting template, I will not include it at this time, and people can make the rule themselves if they really need to. Being stealth goes against RFC protocols anyway so stating RFC doesn't mean anything here, and there would be more comments about how people were not stealth than you could even think of if I allowed port 113.
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jfahrner

join:2003-09-25
Germany

reply to BlitzenZeus
Hello,
I think TCP port 113 should be opened. This is because of auth protocol for some mail servers. It is described in RFC 1413.
When this port is not opened, it causes a significant delay during login on some mail servers. Even if there is no listener on this port, the server waits for a response in his attempt to open this port.

Regards
Jochen
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