Date: Sat, 24 Feb 1996 18:33:16 +0100 (MET) From: Thomas Graichen <graichen@omega.physik.fu-berlin.de> To: davidg@Root.COM Cc: questions@FreeBSD.org Subject: Re: rlogin hangs Message-ID: <199602241733.SAA01022@mordillo>
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>>i'm also nerved by this problem - it's absolutely reproducable (only 2
>>machines connected via ethernet) - it's 2.1.0 and everytime i rlogin - exit -
>>rlogin it won't work - hangs a minute then again it works - and it's
>>_absolutely_ reproducable - if anybody has a solution i may try it out (i
>>haven't seen any fix in the commits of the last months)
>
> This sounds like the 2MSL ("TIME_WAIT") wait is somehow coming into play. I
>believe that inetd sets the "SO_REUSEADDR" socket option for sockets it
>manages, so this must be happening on the rlogin client side instead of the
>server...
>
> Can you tell me: Does the problem occur 1) from freebsd to anything,
>2) from anything to freebsd, or 3) from freebsd to freebsd ?
>
> The problem sounds like (1) and is probably because some sockets that were
>used previously by someone else are now in a "TIME_WAIT" 2MSL state and this
>is 60 seconds long. What to do about it, well, that's another thing. The local
>port is supposed to be dynamically assigned to the next available port number
>since the local port for rlogin isn't important...HOWEVER, rlogin insists on
>having the local port be allocated out of the limited number of reserved ports
>(it asks for port numbers between 512 and 1023), while telnet has no such
>requirement (it asks for ports >=1024). The problem may very well be related
>to this and, if so, may also explain why telnet appears to work okay in the
>same environment.
argh - now that i'll try it with different machines all works fine also
between FreeBSD and FreeBSD (murphy !) - but it definitely happens between
FreeBSD and FreeBSD for me - and yes - telnet works just fine in that cases
t
--
thomas graichen graichen@mail.physik.fu-berlin.de graichen@FreeBSD.org
perfection is reached, not when there is no longer anything to add, but when
there is no longer anything to take away antoine de saint-exupery
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