On Wed, 4 Apr 2001, Hector M Banda wrote:
> Is it possible when subnetting make M$ Messenger Service to work
> sending audio and video?
>
> I have noticed that if I connect my W98 machine straight to the line with a
> public IP, I can send video and audio using Messenger Service and when I
> subnet the same machine, the other machine can get my video and audio but I
> can't.
>
> Is it something I can do to get this to work like adding more services or
> tweak my server to do this?
>
Audio/Video programs usually use UDP as their transport. You need to find
out which port they use and redirect that from your Linux box to the
approperiate machine.
For example, PalTalk (www.paltalk.com) uses UDP ports 2090 and 2091 to
receive audio (among other things). I've got it working using the
followings ($IPADDR is external IP of the Linux box, and $RADDR is the
local IP address of the Windows client):
/sbin/iptables -t nat -A PREROUTING -p udp \
-d $IPADDR --dport 2090 \
-j DNAT --to $RADDR:2090
/sbin/iptables -t nat -A PREROUTING -p udp \
-d $IPADDR --dport 2091 \
-j DNAT --to $RADDR:2091
Hope this helps,
Hossein
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