Galera, segue minhas regras de IPFW para o meu dns. gostaria da analise de vcs e sugestões..
Adicionei a regra do Guto. ipfw add allow udp from me 1024-65535 to any 53 out keep-state uid bind. Obrigada.. /////////////////////////////////////////////////////////////////////// #!/bin/sh fwcmd="/sbin/ipfw -q" oif="fxp0" onet="200.X.X.0" omask="255.255.255.192" oip="200.X.X.X.2" ${fwcmd} -f flush ${fwcmd} add check-state # Libera acesso via SSH porta 3456 ${fwcmd} add pass tcp from any to ${oip} 3456 setup # Libera ping ${fwcmd} add allow icmp from any to any via ${oif} # Libera consulta DNS ${fwcmd} add pass tcp from any to any 53 setup ${fwcmd} add pass udp from any to any 53 ${fwcmd} add pass udp from any 53 to any ${fwcmd} add pass udp from any to any 53 keep-state ${fwcmd} add allow udp from me 1024-65535 to any 53 out keep-state uid bind. #Libera porta 80 para atualizações via fetch. ${fwcmd} add pass tcp from any to any 80 keep-state # Allow TCP through if setup succeeded ${fwcmd} add pass tcp from any to any established # Bloqueia IP spoofing ${fwcmd} add deny all from ${onet}:${omask} to any in via ${oif} # Allow IP fragments to pass through ${fwcmd} add pass all from any to any frag # Bloqueia pacotes com opcoes de Source Routing e Record #Route do Cabecalho IP ativadas. ${fwcmd} add deny tcp from any to any ipoptions ssrr,lsrr,rr #bloquear 5% dos pacotes de entrada, como se houvesse perda de pacotes ${fwcmd} add prob 0.05 deny in #Qualquer outro trafego sera bloqueado e logado no arquivo de log ${fwcmd} add deny src-ip ${oip} via ${oif} keep-state #Bloqueia Tudo ${fwcmd} add 65530 deny ip from any to any ///////////////////////////////////////////////////////////////////////////////////// ------------------------- Histórico: http://www.fug.com.br/historico/html/freebsd/ Sair da lista: https://www.fug.com.br/mailman/listinfo/freebsd