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Date:      Thu, 15 Mar 2001 12:20:30 -0700 (MST)
From:      Nate Williams <nate@yogotech.com>
To:        "Ronan Lucio" <ronan@melim.com.br>
Cc:        <security@FreeBSD.ORG>
Subject:   Re: Port 113
Message-ID:  <15025.5630.472269.543769@nomad.yogotech.com>
In-Reply-To: <099801c0ad7c$75b63800$2aa8a8c0@melim.com.br>
References:  <006b01c0ad38$39eed0a0$1401a8c0@tedm.placo.com> <099801c0ad7c$75b63800$2aa8a8c0@melim.com.br>

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> Could anybody say me when I need to allow the port 113
> in the firewall?

*Need* form auth is a strong word.  However, it does tend to speed up
email transfers is you enable a version that always responds true.

So, any external SMTP servers you have *should* have this port enabled.

> What services use this port?

I know that SMTP uses it, and I believe that ftpd uses it, and I believe
irc also uses it.

> For example: I have a computer that is only DNS server,
> Does this port need allow connections the to DNS service work?

I don't believe so, but someone will certainly correct me if I'm wrong.


Nate

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