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Re: [FW-1] RPC Traffic (TCP 135)



Greetings!

Tim Parker wrote:

We are getting some errors on our site that the "RPC Server is not
available." If a user then refreshes the error goes away. I was searching
MS's site and found that it appears that RPC traffic is on Port 135/TCP.


Solution: RPC over TCP connections are dropped (skI2394)
   To make RPC over TCP work properly, proceed as follows:
   1. From the Policy Editor menu, select Policy> Properties, and in the
       Services tab, check "Enable RPC Control".
   2. In the objects.C file under :props, change the :enable_tcprpc
       property value to (true).
   3. In the Rule Base, allow only the RPC service (under Service).
   4. Install the policy.


Any issues with opening this up to web servers? I know I don't want to let the
NETBios ports through to the web servers from the internet.


Worse: you are opening up the Microsoft RPCs - now anyone can (try to) remote

control your IIS remotely using the standard NT server manager. MS-RPCs are

even more danerous than NBT - IMHO.


Bye Volker

--

Volker Tanger  <[email protected]>
 Wrangelstr. 100, 10997 Berlin, Germany
    DiSCON GmbH - Internet Solutions
         http://www.discon.de/

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