Ethical Hacking Learn to find vulnerabilities before the bad guys do! Gain real world hands on hacking experience in our state of the art hacking lab. Course designed and taught by expert instructors with years of penetration testing experience. 12 student maximum in every class. Certification attempt included in every package. | Computer Forensics Training at InfoSec Institute Gain the in-demand skills of a certified computer examiner, learn to recover trace data left behind by fraud, theft, and cybercrime perpetrators. Discover the source of computer crime and abuse at your organization so that it never happens again. All of our class sizes are guaranteed to be 12 students or less to facilitate one-on-one interaction with one of our expert instructors. |

| Subject: | Re: Source port 0 and from a 0 network to boot? |
|---|---|
| Date: | 11 Jun 2005 19:08:31 -0000 |
The destination website advises they're experiencing 'server problems'. I would have to guess it's a trojan or botnet DDoS/SYN flood attack. As far as the port 0 traffic, a quote from an old Neohapisis archive "Using TCP port 0 is a common tactic to avoid some badly written packet filters.... Some net admins fail to realize that there is a port 0, thinking that the lowest port number is 1, and thus don't account for it when writing firewall rules. An attacker gains the advantage of possibly bypassing firewall rules, or badly written intrusion sensors. It should also be noted that very, very, old versions of DNS were done on port 0, but that wasn't done using TCP." Probably just disguising the attacking host (though not very well) to slow down the filtering/blocking of attackers.
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: Source port 0 and from a 0 network to boot?, Valdis . Kletnieks |
|---|---|
| Next by Date: | Re: Source port 0 and from a 0 network to boot?, kurt |
| Previous by Thread: | Re: Source port 0 and from a 0 network to boot?, Valdis . Kletnieks |
| Next by Thread: | Re: Source port 0 and from a 0 network to boot?, kurt |
| Indexes: | [Date] [Thread] [Top] [All Lists] |