From: Russell King <rmk@arm.linux.org.uk>
To: Kai Henningsen <kaih@khms.westfalen.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: connectivity to bkbits.net?
Date: Thu, 28 Nov 2002 21:13:47 +0000 [thread overview]
Message-ID: <20021128211347.D27234@flint.arm.linux.org.uk> (raw)
In-Reply-To: <8aiMdRMXw-B@khms.westfalen.de>; from kaih@khms.westfalen.de on Thu, Nov 28, 2002 at 06:53:00PM +0200
On Thu, Nov 28, 2002 at 06:53:00PM +0200, Kai Henningsen wrote:
> >From two or three traceroutes, that problem seems to be at the SGI end. I
> can't get to them either (nothing after the same IP as for you, at hop
> #17, some place at Genuity), but you are practically next door.
Lesson #1 of firewalling: drop everything.
Lesson #2 of firewalling: only accept what you absolutely have to.
Try pointing a web browser at sgi.com port 80. I _bet_ you get a
response. The site is reachable, they just block UDP (and probably
a lot of other stuff.)
traceroute uses UDP, so if a site drops UDP (rather than blocking it)
it will appear as a black hole.
--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
next prev parent reply other threads:[~2002-11-28 21:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-28 16:25 connectivity to bkbits.net? Larry McVoy
2002-11-28 16:53 ` Kai Henningsen
2002-11-28 21:13 ` Russell King [this message]
2002-11-28 23:59 ` Miquel van Smoorenburg
2002-11-29 6:55 ` Kai Henningsen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20021128211347.D27234@flint.arm.linux.org.uk \
--to=rmk@arm.linux.org.uk \
--cc=kaih@khms.westfalen.de \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.