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<H1>Re: [MUD-Dev] randomly dropped connections</H1>
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<LI><em>To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
<LI><em>Subject</em>: Re: [MUD-Dev] randomly dropped connections</LI>
<LI><em>From</em>: Ben Greear <<A HREF="mailto:greearb#candelatech,com">greearb#candelatech,com</A>></LI>
<LI><em>Date</em>: Fri, 03 Mar 2000 00:18:04 -0700</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
<LI><em>Sender</em>: <A HREF="mailto:mud-dev-admin#kanga,nu">mud-dev-admin#kanga,nu</A></LI>
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<PRE>
cg#ami-cg,GraySage.Edmonton.AB.CA wrote:
>
> [Matthew Mihaly <diablo#best,com>:]
>
> > I have been having a rather serious problem lately with Achaea, and we are
> > relatively baffled. What is happening is that players are spontaneously
> > getting their links cut. This cannot be the fault of our code (which is
> > interpreted by the vortex engine), as we don't have the power to cut
> > someone's link in this manner (Basically, they lose their link, and then
> > our routine which cycles through looking for players with lost connections
> > ditches the player). It's happened to me a few times, and, when telnetting
> > straight from a linux prompt, the only message I receive is the
> > "connection cut by foreign host" (or something similar). The weird thing
> > is that it seems to 'follow' a character around for a bit. It COULD be our
> > vortex engine, but the author of it assures me he's not touched anything
> > to do with networking for over a year.
> >
> > Something JC said in his post about network setups made me wonder if maybe
> > our ISP (mudservices) has a bad piece of hardware. Could a faulty router
> > or something be causing this sort of problem?
>
> I'm not a networking expert, so hopefully you'll get some replies from
> some of them. However, the one thing that occurs to me is to find out
> what you are seeing at your end. One way would be to get the author of
> Vortex to put some debugging stuff in, to show the reasons for any
> disconnection. If both ends of the connection see the equivalent of
> "connection dropped by other end", then it sure looks like your ISP or
> something.
>
> Another way would be to put some kind of network tester box between your
> host machine and the network connection. It should be able to see which
> end is triggering the disconnect. From what I know of TCP/IP, such a
> box should exist, but I don't know of any in particular. They won't
> be cheap, so you would have to borrow one. Actually, a cheap PC with
> a pair of ethernet cards could do the job, but I don't know if software
> to handle it exists out there.
Actually, they are pretty cheap. Get a pc, and run something like tcpdump,
or ethereal. (This assumes you're running linux...) If you have windows,
netxray is good, if very expensive.)
Also, you only need one NIC, just a hub to plug it into (that is also
plugged into your server of course.) A ether-switch will NOT work for
snooping like this... If you are fast, you can probably pull the link,
insert the hub, and re-connect fast enough to not lose too many connections :)
Put filters on to grab every IP pkt going between the two endpoint IP
addresses, and watch it go. If it isn't obvious, if you can post a
log, or send it to me, I might be able to offer some help...
Ben
>
> --
> Don't design inefficiency in - it'll happen in the implementation.
>
> Chris Gray cg#ami-cg,GraySage.Edmonton.AB.CA
> <A HREF="http://www.GraySage.Edmonton.AB.CA/cg/">http://www.GraySage.Edmonton.AB.CA/cg/</A>
>
> _______________________________________________
> MUD-Dev maillist - MUD-Dev#kanga,nu
> <A HREF="http://www.kanga.nu/lists/listinfo/mud-dev">http://www.kanga.nu/lists/listinfo/mud-dev</A>
--
Ben Greear (greearb#candelatech,com) <A HREF="http://scry.wanfear.com/~greear">http://scry.wanfear.com/~greear</A>
Author of ScryMUD: scry.wanfear.com 4444 (Released under GPL)
<A HREF="http://scry.wanfear.com">http://scry.wanfear.com</A>
_______________________________________________
MUD-Dev maillist - MUD-Dev#kanga,nu
<A HREF="http://www.kanga.nu/lists/listinfo/mud-dev">http://www.kanga.nu/lists/listinfo/mud-dev</A>
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<LI><STRONG><A NAME="00512" HREF="msg00512.html">Re: [MUD-Dev] randomly dropped connections</A></STRONG>
<UL><LI><EM>From:</EM> cg#ami-cg,GraySage.Edmonton.AB.CA</LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><strong><A NAME="00509" HREF="msg00509.html">[MUD-Dev] randomly dropped connections</A></strong>,
Matthew Mihaly <a href="mailto:diablo#best,com">diablo#best,com</a>, Fri 03 Mar 2000, 05:28 GMT
<UL>
<LI><strong><A NAME="00527" HREF="msg00527.html">Re: [MUD-Dev] randomly dropped connections</A></strong>,
adam <a href="mailto:adam#treyarch,com">adam#treyarch,com</a>, Sat 04 Mar 2000, 01:10 GMT
</LI>
<LI><strong><A NAME="00533" HREF="msg00533.html">Re: [MUD-Dev] randomly dropped connections</A></strong>,
Kevin Littlejohn <a href="mailto:darius#connect,com.au">darius#connect,com.au</a>, Sat 04 Mar 2000, 05:02 GMT
</LI>
</UL>
<UL>
<li><Possible follow-up(s)><br>
<LI><strong><A NAME="00512" HREF="msg00512.html">Re: [MUD-Dev] randomly dropped connections</A></strong>,
cg <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Fri 03 Mar 2000, 06:41 GMT
<UL>
<LI><strong><A NAME="00515" HREF="msg00515.html">Re: [MUD-Dev] randomly dropped connections</A></strong>,
Ben Greear <a href="mailto:greearb#candelatech,com">greearb#candelatech,com</a>, Fri 03 Mar 2000, 08:24 GMT
</LI>
<LI><strong><A NAME="00520" HREF="msg00520.html">Re: [MUD-Dev] randomly dropped connections</A></strong>,
J C Lawrence <a href="mailto:claw#kanga,nu">claw#kanga,nu</a>, Sat 04 Mar 2000, 00:12 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
<LI><strong><A NAME="00505" HREF="msg00505.html">[MUD-Dev] Mud Network Setup</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Fri 03 Mar 2000, 02:35 GMT
<UL>
<LI><strong><A NAME="00507" HREF="msg00507.html">Re: [MUD-Dev] Mud Network Setup</A></strong>,
J C Lawrence <a href="mailto:claw#kanga,nu">claw#kanga,nu</a>, Fri 03 Mar 2000, 04:06 GMT
<UL>
<LI><strong><A NAME="00510" HREF="msg00510.html">Re: [MUD-Dev] Mud Network Setup</A></strong>,
David Bennett <a href="mailto:ddt#discworld,imaginary.com">ddt#discworld,imaginary.com</a>, Fri 03 Mar 2000, 05:51 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
</UL></BLOCKQUOTE>
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