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:Reflexive firewalls? |
|---|---|
| Date: | Thu, 27 Dec 2007 13:35:05 -0500 (EST) |
What you are describing sounds like "port knocking". Sorry, no links, but Google will certainly help you if you use that phrase. Mark Coleman Ong Chin Kiat wrote ..
Hi list, I've recently used an SSH server that had an interesting authentication mechanism. You first had to telnet to the machine on a certain port. After doing this (it will just time out - no prompt), you then SSH to the server in question. The telnet step has to be carried out, if not SSH will just time out. My question is, is this called reflexive firewalling, and can I duplicate this with iptables? Thanks.
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: Reflexive firewalls?, 0x90 |
|---|---|
| Next by Date: | RE: Sans GCFW - What about the "OnDemand" training version ?, Craig Wright |
| Previous by Thread: | Re: Reflexive firewalls?, Nick Owen |
| Next by Thread: | RE: Reflexive firewalls?, Jason M. Beauford |
| Indexes: | [Date] [Thread] [Top] [All Lists] |