-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Was the unit still returning packets or did the actual scan it self end up failing? I've scanned Raptor firewalls before and have not seen this behavior, but it could also be very dependent on their specific ruleset. We were scanning an IP that was also used for SNAT at all? Nothing in the logs at all? Also, when you were testing if you could get to the site, during the scan, was it from the same machine, or other location as well as customer reported? Were you able to sniff and see if the packets were passing through the firewall at all, and getting to the web server? S> We've run a pentest against a customer recently and found that the very act S> of port scanning their Raptor firewall (running on NT) crippled its ability S> to accept incoming connections for their web site. The firewall is a new S> high spec PIII and the least line is a decent size. The nmap scans were S> standard timing (not T5 or anything daft) - once the scans were stopped, S> things burst back in to life within about 10minutes. S> S> This sounds like a lack of available connections type problem (similar to S> SYN flooding) to me. The firewall was running at about 10% CPU usage at the S> time and was not swapping to disk at all, also strangely, internal access S> outbound to the net for web browsing seemed unaffected? S> S> Its the latest version of Raptor and we're told its fully patched up to S> date. S> S> Does this ring any bells with anyone? Seems very odd to me... a portscan S> should not cause a DOS by itself... -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (SunOS) Comment: For info see http://www.gnupg.org iEYEARECAAYFAjwROIAACgkQr8DeRYtXr+IWOwCeN+Bo9hBs7rWKWsdw+0uGXYHz ergAn0BNqu8HHooez8yR4SUQlwlZpClj =3r/d -----END PGP SIGNATURE----- ---------------------------------------------------------------------------- This list is provided by the SecurityFocus Security Intelligence Alert (SIA) Service. For more information on SecurityFocus' SIA service which automatically alerts you to the latest security vulnerabilities please see: https://alerts.securityfocus.com/
This archive was generated by hypermail 2b30 : Mon Dec 10 2001 - 13:48:44 PST