Date sent: Sun, 13 Dec 1998 14:02:36 -0500 (EST)
From: Joseph Keen <[EMAIL PROTECTED]>
To: Ford Prefect <[EMAIL PROTECTED]>
Copies to: linux-net <[EMAIL PROTECTED]>,
Linux Admin List <[EMAIL PROTECTED]>
Subject: Re: TCP port 7 inquiry
> Steve,
> This may sound kinda odd but I'm pretty sure that ping uses port 7 to get
> and echo back. Check out the man page for it, first paragraph after the
> options section.
> --Joe
I'm sure it a normal ping doesn't use TCP nor UDP port 7 to get
and echo back. It uses ICMP Echo Request packet, and get back
and ICMP Echo reply packet
christophe leroy
>
> > I just installed "sentry", which is an acitve port-blocker, checks for
> > portscans and adds that IP to /etc/hosts.deny and ipfwadm.. it seems to be
> > working great, but I do have a question:
> >
> > Why would systems from all over be connecting to TCP port 7 constantly? I
> > get connections from places like gtecablemodem.com, kmitnick.stl.doe.gov,
> > k0dez.pbx.org, wootshell.com (not a typo), smoke.da.marjuana.net,
> > metalupyourass.com, and many more which look like normal ISPs, dialins,
> > you name it. Why is this going on? Is it just random checking for
> > something, or is there more to it?
> >
> > ---
> > Steve Huston - Rowan University Comp Sci Major
> > New Jersey, USA
> > PGP Public keys:
> > DSS/DH 0x0A529FF8 fp: C38F 274B F2A8 CE5A 60A5 A8E9 C7B9 AEDD 0A52 9FF8
> > RSA 0xC373028D fp: ADE0 854D 753E EB53 9DFA 5F04 8283 CC99
> >
> > "And no one sings me lullabies,
> > and no one makes me close my eyes;
> > And so I throw the windows wide
> > and call to you across the sky" --Pink Floyd, "Echoes"
> >
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> >
>
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