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: Spider with improbable IP address |
|---|---|
| Date: | Fri, 15 Oct 2004 17:30:21 +0000 |
2004-10-14T18:14:01 Ed Wittmann:
xxx.xxx.xxx.0 Now, I was under the assumption that you can't send and receive on this address - but the requests come in here, and they're clearly going back out here. The weblogs show this address.
The .0 address is routinely the network number, not a usable IP
address --- but this is only because CIDR blocks used as IP nets are
routinely /24 and smaller. Consider the perfectly legitimate IP
network (in RFC 1918 space, for illustration purposes)
10.0.0.0/23
Here are the relevent details:
255.255.255.128 netmask
10.0.0.0 network number
10.0.0.1 host addr
10.0.0.2 host addr
...
10.0.0.254 host addr
10.0.0.255 host addr
==> 10.0.1.0 host addr
10.0.1.1 host addr
...
10.0.1.254 host addr
10.0.1.255 broadcast addr
There's a legit xxx.xxx.xxx.0 host addr. And right before it is
another unexpected sight, an xxx.xxx.xxx.255 host addr.
-Bennett
pgpSb6roNX09e.pgp
Description: PGP signature
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: Spider with improbable IP address, insecure |
|---|---|
| Next by Date: | RE: Spider with improbable IP address, k levinson |
| Previous by Thread: | Re: Spider with improbable IP address, insecure |
| Next by Thread: | Re: Spider with improbable IP address, Ric Messier |
| Indexes: | [Date] [Thread] [Top] [All Lists] |