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Date:      Fri, 1 Jun 2001 11:56:06 -0400 (EDT)
From:      Jim Freeze <jim@freeze.org>
To:        Peter <fbsdq@yahoo.com>
Cc:        <freebsd-questions@freebsd.org>
Subject:   Re:Why would my system be unaccessible?
Message-ID:  <Pine.BSF.4.32.0106011154020.70612-100000@www.stelesys.com>
In-Reply-To: <SAK.2001.06.01.ffeaomtm@support10>

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On Fri, 1 Jun 2001, Peter wrote:

> If the IP you listed is real, I just scanned it, and it shows as
> http and ssh are both 'filtered' which means it's behind a firewall.
>
> Most likely that is what is happening to you also.
>
> On 06/01/2001 9:50:59 AM, Peter is quoted as saying:

Hmm...
This is what I got:
% nmap 24.9.218.175 -p 22,80

Starting nmap V. 2.53 by fyodor@insecure.org ( www.insecure.org/nmap/ )
Note: Host seems down. If it is really up, but blocking our ping probes,
try -P0
Nmap run completed -- 1 IP address (0 hosts up) scanned in 36 seconds
% nmap 24.9.218.175 -P0 -p 22,80

Starting nmap V. 2.53 by fyodor@insecure.org ( www.insecure.org/nmap/ )
Interesting ports on ci590846-b.lxintn1.ky.home.com (24.9.218.175):
Port       State       Service
22/tcp     filtered    ssh
80/tcp     filtered    http

Nmap run completed -- 1 IP address (1 host up) scanned in 36 seconds


OK. Looks like we get the same.
Now for the kicker. I have had my firewall running for about
a year. I was accessing my machine yesturday and I did not
change my firewall settings.

Could these services be blocked by my ISP @Home?
Is there a way to tell?

Thanks
Jim

>
>
> . . . .|A firewall blocking your access?
> . . . .|	Have you tried running a port scanner on your
> . . . .|machine from the outside?
> . . . .|
> . . . .|	nmap mymachine.com -p 22,80
> . . . .|
> . . . .|see if it returns:
> . . . .|open
> . . . .|closed
> . . . .|or filtered, [means it's behind a firewall [most likely] ].
> . . . .|
> . . . .|On 06/01/2001 9:07:10 AM, Jim Freeze is quoted as saying:
> . . . .|
> . . . .|
> . . . .|. . . .|Hi
> . . . .|. . . .|
> . . . .|. . . .|My system, which I think is running ok, is all of a sudden
> . . . .|. . . .|unaccessible. Trying to ssh into the machine hangs, yet
> . . . .|. . . .|sshd is running. Trying to go to a web page returns
> . . . .|. . . .|nothing, yet apache is running. To add to the confusion,
> . . . .|. . . .|ping says it is alive.
> . . . .|. . . .|
> . . . .|. . . .|Can someone suggest why or help me debug why this is happening?
> . . . .|. . . .|
> . . . .|. . . .|The ip is 24.9.218.175.
> . . . .|. . . .|
> . . . .|. . . .|This is what ssh does:
> . . . .|. . . .|ssh -v 24.9.218.175
> . . . .|. . . .|OpenSSH_2.5.2p2, SSH protocols 1.5/2.0, OpenSSL 0x0090600f
> . . . .|. . . .|debug1: Seeded RNG with 39 bytes from programs
> . . . .|. . . .|debug1: Seeded RNG with 3 bytes from system calls
> . . . .|. . . .|debug1: Rhosts Authentication disabled, originating port will not be
> . . . .|. . . .|trusted.
> . . . .|. . . .|debug1: ssh_connect: getuid 1054 geteuid 0 anon 1
> . . . .|. . . .|debug1: Connecting to 24.9.218.175 [24.9.218.175] port 22.
> . . . .|. . . .|debug1: connect: Connection timed out
> . . . .|. . . .|debug1: Trying again...
> . . . .|. . . .|debug1: Connecting to 24.9.218.175 [24.9.218.175] port 22.
> . . . .|. . . .|debug1: connect: Connection timed out
> . . . .|. . . .|...
> . . . .|. . . .|
> . . . .|. . . .|Thanks
> . . . .|. . . .|
> . . . .|. . . .|=========================================================
> . . . .|. . . .|Jim Freeze
> . . . .|. . . .|jim@freeze.org
> . . . .|. . . .|---------------------------------------------------------
> . . . .|. . . .|No comment at this time.
> . . . .|. . . .|http://www.freeze.org
> . . . .|. . . .|=========================================================
> . . . .|. . . .|
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=========================================================
Jim Freeze
jim@freeze.org
---------------------------------------------------------
No comment at this time.
http://www.freeze.org
=========================================================


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