From: inf...@anglianet.co.uk (Pete White)
Subject: Linux lies
Date: 1997/05/22
Message-ID: <5m1is4$cdj$1@pheidippides.axion.bt.co.uk>#1/1
X-Deja-AN: 243089186
Organization: InfoTek Security Consultants
Reply-To: inf...@anglianet.co.uk
Newsgroups: comp.os.linux.networking
So I have your attention.
First I admit I am a newbie so please forgive this intrusion.
Having been delighted to get not one but TWO Linux systems up I spent
the next while having them ping each other.
Eventually, I decided it was boring so I did a quick SHUTDOWN -H NOW
to one and watched the other to see what happened. Nothing happened.
Even though one of the Linux boxes clearly displays the message SYSTEM
HALTED it is quite happy to respond to ping requests.
I stopped the box doing the pinging and restarted it. To my suprise,
the SYSTEM HALTED box merrily replied to the ping requests.
Has anyone any idea what other services a halted Linux system will
respond to.
My confidence was restored when I switched off the Linux system - it
stopped responding to pings. ----phew !!
Peter White
InfoTek Security.
From: "Jeff Barrow" <Z...@uo.netc.com>
Subject: Re: Linux lies
Date: 1997/05/23
Message-ID: <864441792.517597@news.netc.com>#1/1
X-Deja-AN: 243501384
Cache-Post-Path: news.netc.com!unk...@s2.b3.netc.com
References: <5m1is4$cdj$1@pheidippides.axion.bt.co.uk>
<338498F6.156AB81@darwin.demon.co.uk>
X-MimeOLE: Produced By Microsoft MimeOLE Engine V4.71.0544.0
Organization: Internet Connections, Inc.
Newsgroups: comp.os.linux.networking
[clip]
>> I stopped the box doing the pinging and restarted it. To my suprise,
>> the SYSTEM HALTED box merrily replied to the ping requests.
>>
>> Has anyone any idea what other services a halted Linux system will
>> respond to.
Halting a Linux box does not shut down any of the networking. A Halted
Linux box will happily and merrily forward packets as well.
From: miq...@cistron.nl (Miquel van Smoorenburg)
Subject: Re: Linux lies
Date: 1997/05/24
Message-ID: <5m7j5b$lc4$1@holodeck.cistron.nl>#1/1
X-Deja-AN: 243667469
References: <5m1is4$cdj$1@pheidippides.axion.bt.co.uk>
<338498F6.156AB81@darwin.demon.co.uk> <864441792.517597@news.netc.com>
<odyb94d9i9.fsf@nepenthe.eas.san-jose.ca.us>
Organization: Cistron Internet Services B.V.
X-Server-Date: 24 May 1997 20:30:14 GMT
Newsgroups: comp.os.linux.networking
In article <odyb94d...@nepenthe.eas.san-jose.ca.us>,
Earl Stutes <est...@eas.san-jose.ca.us> wrote:
>"Jeff Barrow" <Z...@uo.netc.com> writes:
>
>> [clip]
>> >> I stopped the box doing the pinging and restarted it. To my suprise,
>> >> the SYSTEM HALTED box merrily replied to the ping requests.
>> >>
>> >> Has anyone any idea what other services a halted Linux system will
>> >> respond to.
>>
>> Halting a Linux box does not shut down any of the networking. A Halted
>> Linux box will happily and merrily forward packets as well.
Get the latest sysvinit (2.71) and find the script where the real "halt"
or "reboot" command is called. Add the "-i" option. From the manual page:
-i Shut down all network interfaces just before halt
or reboot.
sysvinit 2.71 is part of debian 1.3 and can also be gotten from
ftp.cistron.nl/pub/people/miquels/software.
I really ought to upload it to sunsite and tsx-11 this week. Remind me
if I don't.
Mike.
--
| Miquel van Smoorenburg | "I need more space" "Well, why not move to Texas" |
| miq...@cistron.nl | "No, on my account, stupid." "Stupid? Uh-oh.." |
| PGP fingerprint: FE 66 52 4F CD 59 A5 36 7F 39 8B 20 F1 D6 74 02 |