Great Circle Associates Firewalls
(September 1995)

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Subject: FW: SNMP <-> Firewalls
From: Greg Brennan <brenngp @ onto . network . com>
Date: Thu, 21 Sep 95 11:51:00 CDT
To: firewalls mailing list <firewalls @ greatcircle . com>
Encoding: 25 TEXT

And if you want to use Network Systems Corp's "Borderguard Router" or their 
"The Security Router", you can use the Data Privacy Facility to provide 
encryption *and/or* authentication between their NSC router and yours.  This 
way you would only need to pass authenticated SNMP messages through the 
firewall.  Anything else coming in to port 161 or 162 would be dropped.

Check out NSC's home page at for more info

Greg Brennan

>Date:  September 19, 1995 12:43PM
>Does anybody know if it is possible to get SNMP through a firewall?  We
>have a client who wants us to do network management remotely for them,
>however they have a firewall in place.  They would rather not run a
>seperate line around the firewall.
>Any help would be greatly appreciated.
>>If you are just using a filtering router you can open it up to
>>pass UDP datagrams to and from ports 161 and 162.
>>If your firewall is of the application level gateway variety
>>you should be able to configure and run the udprelay program.

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