--Signature=_Thu__5_Feb_2004_15_18_18_-0700_MJVP7Zo+30y.CDUX
Content-Type: text/plain; charset=US-ASCII
Content-Disposition: inline
Content-Transfer-Encoding: 7bit
On Thu, 5 Feb 2004 14:09:52 -0800 (PST)
"Jeremy C. Reed" <
reed@reedmedia.net> wrote:
|> On Thu, 5 Feb 2004, Michael Havens wrote:
|>
|> > Why could I ping things with out the www but not with the www?
|>
|> Different IP addresses.
|>
|> Some systems allow pings to work. And some don't.
|>
|> > added the www and it wouldn't ping. I then pulled up the page with the
|> > www and there it was. So then what.... was there a redirection from the
|> > one w/o the www to the one with?
|>
|> A webpage is using TCP (port 80). The ping is using ICMP. The protocols
|> are different. Many admins setup firewalls for ICMP echos (request and/or
|> response).
|>
|> What is the unix trace route command?
|>
|> An IP packet has a time-to--live counter. It decreases by one each time it
|> is routed. So when an IP packet goes from router to router, it decreases.
|>
|> traceroute sets it to one.
|>
|> Then attempts to do three UDP port 33434 probes of the destination. But
|> since the TTL is at one, the router doesn't route it and just responds
|> saying that the time has exceeded. Then traceroute prints the name of the
|> host, the TTL used and how much time it took for each probe.
|>
|> Then traceroute tries with the TTL set to two. And so on (repeat previous
|> paragraph).
|>
have you ever used nmap ... its got alotta features and you can check if ports
are open closed filtered... whatever you want...
--
jason pearl <jason@jpearl.org>
++++++++++++++++++
"Keep your friends close and your enemies closer"-Tupac
++++++++++++++++++
Kurrupted Visionz Phx, AZ registered linux user #307811
RHEL WS 3.0 Linux Machine# 193475, 227341
AMD64 Opteron 1.6 ASUS SK8N http://counter.li.org
uptime
15:16:50 up 2:11, 3 users, load average: 0.15, 0.16, 0.10
--Signature=_Thu__5_Feb_2004_15_18_18_-0700_MJVP7Zo+30y.CDUX
Content-Type: application/pgp-signature
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (GNU/Linux)
iD8DBQFAIsEqPFVsjEfVJfsRAmjHAJ94OkkijPmzdlf1Cj1/bu7GkjzbAgCfegeA
B8ou+1FaFiDpQ3OEtve+50s=
=+VSb
-----END PGP SIGNATURE-----
--Signature=_Thu__5_Feb_2004_15_18_18_-0700_MJVP7Zo+30y.CDUX--
(text/plain)