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Re: router question...
From: PCSC Information Services <info () pcsage biz>
Date: Mon, 23 Jan 2006 23:07:38 -0500

Hi Dave,

A couple of questions might provide us with better problem resolution:
When trying to access the domain names in question were you trying to access the domain from a host inside of the router? or outside of the router?

Was this symptom reported to you from an external source? Or was it an internal assessment? These things can point to vastly different problems. All sources must be checked and confirmed for a more accurate assessment. It's entirely possible that the router had a 'brain fart' and stopped packet forwarding to those hosts... it's unfortunate that the router wasn't able to provide you with more troubleshooting information. Perhaps you should also contact your ISP and inquire as to logs about what traffic was directed at your ips during the times in question and see if that might have anything to do with the error.

Understanding the topology would give us greater clarity on the issue, and potential solutions as they may be appropriate.

Sincerely,

Sean Swayze
info () pcsage biz

On 21-Jan-06, at 3:08 PM, Dave wrote:

I had an odd experience yesterday and was wandering if anyone could help shed some light on it...

I run a webserver that I keep behind a router/firewall. The router is a standard store bought Linksys BEFSX41. The firewalls NAT feature is disabled so someone on the local LAN can access the server via it's Internet domain name. The routers 'remote administration' feature is disabled so no one outside the LAN can log into the config page.

The problem: Yesterday a couple of the websites being hosted on the server were basiclly unavailable. At first we were thinking DoS of some sort but no evidence in the servers logs to support this as far as I know. At any rate, when I would try to access the problem page I was greeted with the router log in prompt! I (using a local machine) log into the router to verify that the 'remote administration' option is dissabled...it was. So why when I tried to access the troubled website via domain name (www.troubled_site.com) I was greeted with my routers log in prompt?

The routers firmware is up to date...I call linksys and asked if they knew what it could be. they did not know. I looked for and asked if anyone knew of any exploit code that could do this to this router...no luck (doesnt mean it doesnt exist). So why was my router (for a short time only) prompting website visitors with it's log in prompt?

Any ideas / comments appreciated.

dave

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---------------------------------------------------------------------------
EARN A MASTER OF SCIENCE IN INFORMATION ASSURANCE - ONLINE
The Norwich University program offers unparalleled Infosec management education and the case study affords you unmatched consulting experience. Tailor your education to your own professional goals with degree customizations including Emergency Management, Business Continuity Planning, Computer Emergency Response Teams, and Digital Investigations.
http://www.msia.norwich.edu/secfocus
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