[OpenAFS] ISP blocking Krb4 traffic?
Jeffrey Altman
jaltman@columbia.edu
Thu, 15 Apr 2004 12:15:07 -0400
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It is krb524 that you are unable to reach.
At least in the MIT clients you can specify
where you want the krb524 daemon to be located.
It does not have to be on port 4444. Since I
hope you are not running a web server on your
KDC I recommend running a second krb524d on your
KDC using port 80. It is highly unlikely an
ISP will block this port.
In the <REALM> = {} add a line which reads
krb524_server=<hostname>:80
Or specify a _krb524._udp.<REALM> SRV record in your
DNS.
the OpenAFS for Windows 1.3.63 and above will no
longer require the use of krb524d in order to obtain
AFS tokens from Krb5 tickets.
Similar support for Unix will be in 1.3.64 and above.
Jeffrey Altman
Ryan Underwood wrote:
>I've noticed recently that our ISP seems to be dropping outbound traffic
>with a destination port equal to 4444. I think this is to circumvent
>some Windows worm that uses that port. However, it has the side effect
>of completely neutering Kerberos 4 usage to an off-site realm, because
>traffic on port 4444 from the client to the krb4 KDC (or krb524) is
>dropped.
>
>Is anyone else experiencing this problem, and also are there any
>convenient workarounds for this? What complete stupidity.
>
>
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It is krb524 that you are unable to reach.<br>
At least in the MIT clients you can specify <br>
where you want the krb524 daemon to be located.<br>
It does not have to be on port 4444. Since I<br>
hope you are not running a web server on your <br>
KDC I recommend running a second krb524d on your <br>
KDC using port 80. It is highly unlikely an<br>
ISP will block this port.<br>
<br>
In the <REALM> = {} add a line which reads<br>
<br>
krb524_server=<hostname>:80<br>
<br>
Or specify a _krb524._udp.<REALM> SRV record in your<br>
DNS.<br>
<br>
the OpenAFS for Windows 1.3.63 and above will no<br>
longer require the use of krb524d in order to obtain<br>
AFS tokens from Krb5 tickets.<br>
<br>
Similar support for Unix will be in 1.3.64 and above.<br>
<br>
Jeffrey Altman<br>
<br>
<br>
<br>
<font face="Bitstream Cyberbit">Ryan Underwood wrote:<br>
</font>
<blockquote cite="mid20040415155458.GA5518@dbz.icequake.net" type="cite">
<pre wrap=""><font face="Bitstream Cyberbit">I've noticed recently that our ISP seems to be dropping outbound traffic
with a destination port equal to 4444. I think this is to circumvent
some Windows worm that uses that port. However, it has the side effect
of completely neutering Kerberos 4 usage to an off-site realm, because
traffic on port 4444 from the client to the krb4 KDC (or krb524) is
dropped.
Is anyone else experiencing this problem, and also are there any
convenient workarounds for this? What complete stupidity.
</font></pre>
</blockquote>
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