Фаервол

root@somehost:/home/ucom4b# cat /etc/iptables/rules.v4
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:kamailio - [0:0]
:freeswitch - [0:0]
:web - [0:0]
# prepare
-A INPUT -i lo -j ACCEPT
-A INPUT -p icmp -j ACCEPT
# accept out, established
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
#main section
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -i ens18 -j kamailio
-A INPUT -i ens18 -j freeswitch
-A INPUT -i ens18 -j web
# deny other
-A INPUT -i ens18 -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited

#-A kamailio -i ens18 -p tcp -m tcp --dport 5060 -j ACCEPT -m comment --comment "SIP traffic - TCP (disabled)"
-A kamailio -i ens18 -p udp -m udp --dport 5060 -j ACCEPT -m comment --comment "SIP traffic - UDP"
-A kamailio -i ens18 -p udp -m udp --dport 5068 -j ACCEPT -m comment --comment "SIP traffic - UDP"
-A kamailio -j RETURN

# 5080 - freeswitch sip port, drop it, all another ports accept
-A freeswitch -i ens18 -p tcp -m tcp --dport 5080 -j DROP
-A freeswitch -i ens18 -p udp -m udp --dport 5080 -j DROP
-A freeswitch -i ens18 -p udp -m udp --dport 1025:65535 -j ACCEPT -m comment --comment "RTP"
-A freeswitch -j RETURN
#
-A web -i ens18 -p tcp -m tcp --dport 80 -j ACCEPT -m comment --comment "HTTP"
-A web -i ens18 -p tcp -m tcp --dport 443 -j ACCEPT -m comment --comment "HTTPS"
-A web -j RETURN
#
COMMIT