Desativar o firewall linha de comando

netsh firewall set opmode mode = enable
netsh firewall set opmode mode = disable

Win XP

(desativar FW) netsh firewall set opmode disable

(habilitar FW) netsh firewall set opmode enable

Win 7

(desativar FW) netsh advfirewall set allprofiles state off

(habilitar FW) netsh advfirewall set allprofiles state on

remotamente usa o psexec \\nome_da_maquina netsh firewall set opmode disable