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Date: Tue, 18 Aug 1998 19:00:20 -0500 (CDT)
From: Joel Ray Holveck <detlev!joelh@mail.camalott.com>
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To: FreeBSD-gnats-submit@FreeBSD.ORG
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Subject: bin/7669: libalias does not IRC DCC packets under certain conditions
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>Number:         7669
>Category:       bin
>Synopsis:       libalias does not IRC DCC packets under certain conditions
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Aug 18 17:10:00 PDT 1998
>Last-Modified:
>Originator:     Joel Ray Holveck
>Organization:
Little to none
>Release:        FreeBSD 3.0-CURRENT i386
>Environment:

FreeBSD box running ijjppp in -auto -alias mode through modem to ISP.
Ethernet LAN also includes Win95 box running mIRC v2.

>Description:

Note: This is a dogwash, but I wanted to document the workaround.

mIRC, a popular MS Windows-based IRC client, can determine the address
that it should use for itself in DCC-based activities in one of two
ways.  It can query the OS for its address, or it can query the IRC
server.  In the latter case, if the connection between the box in
question and the IRC server includes a FreeBSD box performing address
translation via ppp -alias (or other libalias-based system), then the
address returned is the address of the FreeBSD box.  This means that
DCC requests from the mIRC client are sent out with the FreeBSD box's
address encoded in the request.

libalias includes a facility to examine outgoing packets for IRC DCC
packets and perform the necessary translation.  However, it only
performs this if the address encoded in the DCC packet is that of a
system being aliased.  In the case where the IRC client gets its
address from the server, then libalias will not perform this
translation.

IWBNI libalias would perform the translation in this case.

>How-To-Repeat:

See description.

>Fix:
	
In mIRC, set the local info query method to "Normal".
>Audit-Trail:
>Unformatted:

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