Re: UDP - ports to allow?

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From: oliver@greyhat.de (Oliver)
Date: 18 Mar 2003 01:29:54 -0800

Hi...

browsing through another security-forum i found that IE seems to
connect to localhost to port 1788 for caching functionality.

Here is the link:
http://groups.google.com/groups?dq=&hl=de&lr=&ie=UTF-8&oe=UTF-8&threadm=n07d7vs3kedd5kk6qhesv89h9srkdkq83q%404ax.com&prev=/groups%3Fhl%3Dde%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26group%3Dcomp.security.firewalls

PS: The old and wellknown trick to solve problems like your's, is to
install a firewall which has logging capabilities. Then you only have
to look into the FW-Logfile to see which packets (Ports) are blocked.

bye,

Oliver
www.greyhat.de

"rebocardo" <bii@dscga.com> wrote in message news:<ozednYDRQ9ibRc6jXTWc3A@dscga.com>...
> UDP - ports to allow?
>
> I am running a non-MS Web server under WinNT4.0 Server
> with DNS server.
>
> Under the Network/Advance/Enable security tab
> I am having problems allowing only port 53
> under UDP. The browser IE6.X stops working with a
> page/server not found error.
>
> What I have set up:
>
> only the TCP protocol installed
>
> TCP Allow:
> 20,21,23,25,53,80,110,443,990
> IP Allow:
> 6,17
> UDP Allow:
> 53
>
> To get the browser to work, I have to allow all UDP ports. Is there a UDP
> port besides port 53 I have to allow to get the IE 6.x to work? Using
> netstat -a -n I can not see anything IE is trying to open.
>
> Is there something I am missing? I tried the MS knowledge base and various
> firewall sites. I see no answer to this particular problem.
>
> Thanks in advance for any help.

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