[CLUE-Tech] Cisco 675 PPP vs. Bridging modes

[rjohnston at TechAngle.com]

In ppp the Cisco has an IP and unless you have set up a legal IP for your
box, it uses NAT for your internal addresses.

In bridging mode however, the 675 passes (acts as an IP-less "bridge") the
IP through to your box.  So instead of the live IP being on the Cisco, it's
on your network card.  So, in most cases bridging mode is more dangerous to
your box.


----- Original Message -----
From: "JL Kottal" <jlkottal at americanisp.net>
To: "BLUG" <lug at lug.boulder.co.us>; "Clue Tech"
<clue-tech at clue.denver.co.us>
Sent: Thursday, August 09, 2001 4:33 PM
Subject: [CLUE-Tech] Cisco 675 PPP vs. Bridging modes


> Hello,
>
> This message was posted both BLUG and CLUE-tech.
>
> Could someone(s) please compare and contrast the bridging and the PPP
> modes for a Cisco 675 router, vis-a-vis the advantages and
> disadvantages, bandwidth, security, etc.?
>
> I am currently using an ISP with the 675 in PPP mode and, in spite of
> having applied the 675 CBOS upgrade and redirecting the HTTP port, I
> am still getting killed by the Code Red worm. Someone has suggested
> that placing the 675 in the bridging mode will eliminate this
> vulnerability.
>
> I talked to my ISP, who swears that the bridging mode is the worst
> possible way to run this router, but I am not sure that I understand
> their reasons because they sounded like so much double-talk.
>
> Thus I pose my question to a relatively unbiased group and hope that
> this does not cause a flame war ... <g>
>
> JohnK
>
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