[lug] Cisco 675 PPP vs. Bridging modes

[George Sexton]

I have ran my Cisco 675 in bridging mode for almost two years with almost 0
problem.

As others have said, it essentially turns the router into an adapter that
allows you to directly connect your Ethernet connection into an ADSL line.

In one configuration that I ran, I had a P120 with 48MB RAM and two NICs.
One NIC was plugged into the 675, and the other was hooked to the local
network using RFC1918 reserved addresses and IP Masquerading. I had only one
fixed IP address. This worked flawlessly.

My current configuration has two NICs and does routing for 16 IP addresses.
If you  are going to try this configuration, you better know your networking
pretty well.

We are using FRII.COM and have only had one outage. Their pricing is very
reasonable also.

-----Original Message-----
From: lug-admin at lug.boulder.co.us [mailto:lug-admin at lug.boulder.co.us]On
Behalf Of JL Kottal
Sent: 09 August, 2001 4:34 PM
To: BLUG; Clue Tech
Subject: [lug] 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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