North American Network Operators Group

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Re: Telco's write best practices for packet switching networks

  • From: Eric Brandwine
  • Date: Wed Mar 06 13:23:04 2002

>>>>> "rp" == Rob Pickering <[email protected]> writes:

rp> --On 06 March 2002 15:04 +0000 "Christopher L. Morrow" <[email protected]> 
rp> wrote:
>> Eric's point was you deploy your fancy-dan mail server with ONLY 22
>> and 25 listening,

rp> Um, that would be "ONLY port 25 listening" on it's public network 
rp> facing interface wouldn't it.

rp> Why would you want to expose a management protocol like ssh to the 
rp> Internet?

You wouldn't.  Neither would I.  I'll go poke fun at Chris.

rp> OK so leaving ssh open is convenient, but if we are talking best 
rp> practice surely having your remote management protocols running on a 
rp> separate network, or at the very least filtering on a host basis so 
rp> that it's only listening to connects from your NOC has to be the way 
rp> to do this.

Absolutely.  It bothers me that as an ISP, we kinda have to run mail
and dns servers.  If there were two protocols I'd choose NOT to expose
to the public network, they'd be it.  I'd much rather expose ssh than
bind or sendmail.

Eric Brandwine     |  Apart from hydrogen, the most common thing in the
UUNetwork Security |  universe is stupidity.
[email protected]       |
+1 703 886 6038    |      - Harlan Ellison
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