Hi friends, I am having problem for blocking ms-messenger. My firewall this based in packets filter and the policy input/output/forward is ACCEPT. Already the following politics in firewall is implemented in the top rules: ipchains -A input -p tcp -d any/0 --destination-port 1863 -j DENY ipchains -A input -p tcp -d any/0 --destination-port 1864 -j DENY ipchains -A forward -p tcp -d any/0 --destination-port 1863 -j DENY ipchains -A forward -p tcp -d any/0 --destination-port 1864 -j DENY ipchains -A output -p tcp -d any/0 --destination-port 1863 -j DENY ipchains -A output -p tcp -d any/0 --destination-port 1864 -j DENY ipchains -A input -p udp -d any/0 --destination-port 1863 -j DENY ipchains -A input -p udp -d any/0 --destination-port 1864 -j DENY ipchains -A forward -p udp -d any/0 --destination-port 1863 -j DENY ipchains -A forward -p udp -d any/0 --destination-port 1864 -j DENY ipchains -A output -p udp -d any/0 --destination-port 1863 -j DENY ipchains -A output -p udp -d any/0 --destination-port 1864 -j DENY However, these politics are not having validity, therefore my users are obtaining to use this program. Somebody as some tip of as to block this software? Thanks a lot! Best regards. P.S.: Plese, it forgives for the horrible english. :-) -- =================================== Sergio A. Lima Junior Analista de Suporte =================================== Servico de Atendimento ao Cliente Depto. de Suporte Gruponet Tecnologia sergio@xxxxxxxxxxxxxxx http://www.gruponet.com.br =================================== ------------------------------------------------------------------------ To unsubscribe email security-discuss-request@xxxxxxxxxxxxxxxxx with "unsubscribe" in the subject of the message.