Hi, blocking yahoo messenger on iptables is not enough, becoze users will still be able to connect through a proxy, u have to block it on the proxy as well. Concerning my email of 10/01/02 it was not very accurate, but unfortunately nobody warned me, I had to discover the error by myself: there's a missing line , when I added it, yahoo messenger and ICQ worked (as well as IRC after loading related modules) this line is: iptables -A FORWARD -i eth0 -o eth1 -m state --state ESTABLISHED, RELATED -j ACCEPT If u don't insert this line yahoo messenger will not work but also most applications. --- alexander.swann@synetics.fr wrote: > > Hello > I just did a quick search in the mails I received > ;-) > > > ----------------------------------------------------- > Daryl Martin wrote on the 08/16/02 : > > Just block outgoing traffic on port 1863 to > block messenger traffic. > > http://support.microsoft.com/default.aspx?scid=kb;EN-US;q278887 > > To block Yahoo it seems that's a little bit > tricker. To block yahoo > you will have to block ports 5000-5010 for voice > chat, 5100 for video. > Yahoo messenger scans ports 5050 then 80 then any > available port. You > will probably most likely have to block the yahoo > messenging IP. > > http://help.yahoo.com/help/us/mesg/use/use-17.html > > > ----------------------------------------------------- > > See also the message of "Hanz F." on the 10/01/02 > (4 days ago) > > > ----------------------------------------------------- > > Hope this will help > > Swann ;-) > > > > > |---------+-----------------------------------> > | | Alok Shukla | > | | <alokshukla@yahoo.com> | > | | Envoyé par : | > | | netfilter-admin@lists.ne| > | | tfilter.org | > | | | > | | | > | | 05/10/2002 17:59 | > | | | > |---------+-----------------------------------> > > >--------------------------------------------------------------------------------------------------------------------------------------------------| > | > > | > | Pour : netfilter@lists.netfilter.org > > | > | cc : > > | > | Objet : How to block Yahoo Messenger > through IP Tables > | > > >--------------------------------------------------------------------------------------------------------------------------------------------------| > > > > > Hi , > > Sorry for asking this newbie question first. > > I am running a network with a Linux Server as a > gateway. I am using IPtables as to masquerade > internal > IPs for Internet usage. I want to block the uses of > my > intranet for using yahoo messenger. I needed help > for > this. In general i wanted to know how to block a > particular port. > > Thanks in Advance > > Alok Shukla > > __________________________________________________ > Do you Yahoo!? > Faith Hill - Exclusive Performances, Videos & More > http://faith.yahoo.com > > > > > > __________________________________________________ Do you Yahoo!? Faith Hill - Exclusive Performances, Videos & More http://faith.yahoo.com
