[Asterisk-Users] asterisk and iptables

[Andres Baravalle]

Hi,
I have a problem with asterisks on Linux.

Looks like it is a iptables problem. My external client (eyebeam, on a
different computer) cannot register to the asterisk server, but the
asterisk server itself *looks* working.

If I dial one of the incoming phone numbers for the server, I can see
the call arriving in Asterisk  (using asterisk -r).

I tried nmap on my server, and this is the result:

PORT      STATE    SERVICE
4569/tcp  filtered unknown
5036/tcp  filtered unknown
5060/tcp  closed   sip
10000/tcp filtered snet-sensor-mgmt

Seems bad to have 5060 closed, because it should be the port for sip
comunications.

Other outputs:
netstat -a | grep 5060
udp        0      0 *:5060                      *:*

This is my iptables scripts:

set -e

echo 0 > /proc/sys/net/ipv4/ip_forward
([ -f /var/lock/subsys/ipchains ] && /etc/init.d/ipchains stop)
>/dev/null 2>&1 || true
(rmmod ipchains) >/dev/null 2>&1 || true
/sbin/iptables -F
/sbin/iptables -X
/sbin/iptables -Z
/sbin/iptables -P INPUT DROP
/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/iptables -A INPUT -p tcp ! --syn -j REJECT --reject-with tcp-reset
/sbin/iptables -A INPUT -m state --state INVALID -j DROP
/sbin/iptables -P OUTPUT DROP
/sbin/iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/iptables -A OUTPUT -p tcp ! --syn -j REJECT --reject-with tcp-reset
/sbin/iptables -A OUTPUT -m state --state INVALID -j DROP
/sbin/iptables -P FORWARD DROP
/sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/iptables -A FORWARD -p tcp ! --syn -j REJECT --reject-with tcp-reset
/sbin/iptables -A FORWARD -m state --state INVALID -j DROP
/sbin/iptables -A INPUT -i lo -j ACCEPT
/sbin/iptables -A OUTPUT -o lo -j ACCEPT
/sbin/iptables -A FORWARD -i lo -o lo -j ACCEPT
/sbin/iptables -t mangle -F
/sbin/iptables -t mangle -X
/sbin/iptables -t mangle -Z
/sbin/iptables -t mangle -P PREROUTING ACCEPT
/sbin/iptables -t mangle -P OUTPUT ACCEPT
/sbin/iptables -t mangle -P INPUT ACCEPT
/sbin/iptables -t mangle -P FORWARD ACCEPT
/sbin/iptables -t mangle -P POSTROUTING ACCEPT
/sbin/iptables -t nat -F
/sbin/iptables -t nat -X
/sbin/iptables -t nat -Z
/sbin/iptables -t nat -P PREROUTING ACCEPT
/sbin/iptables -t nat -P OUTPUT ACCEPT
/sbin/iptables -t nat -P POSTROUTING ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 783 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 3000 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 443 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 2000 -j ACCEPT
/sbin/iptables -A INPUT -p udp --dport 2727 -j ACCEPT
/sbin/iptables -A INPUT -p udp --dport 4520 -j ACCEPT
/sbin/iptables -A INPUT -p udp --dport 4569 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 5060 -j ACCEPT
/sbin/iptables -A INPUT -p udp --dport 5060 -j ACCEPT
/sbin/iptables -A INPUT -p udp --dport 10000:20000 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 23 -s [safeip] -j ACCEPT
/sbin/iptables -A INPUT -p udp --dport 23 -s [safeip] -j ACCEPT

/sbin/iptables -A INPUT -p udp -s [safeip] -j ACCEPT
/sbin/iptables -A INPUT -p tcp -s [safeip] -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 8443 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 443 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 21 -j DROP

/sbin/iptables -A INPUT -p tcp --dport 22 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 25 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 465 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 110 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 995 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 143 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 993 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 106 -s 127.0.0.1 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 106 -j DROP

/sbin/iptables -A INPUT -p tcp --dport 3306 -s 127.0.0.1 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 3306 -j DROP

/sbin/iptables -A INPUT -p tcp --dport 5432 -s 127.0.0.1 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 5432 -j DROP

/sbin/iptables -A INPUT -p tcp --dport 9008 -j DROP
/sbin/iptables -A INPUT -p tcp --dport 9080 -j DROP

/sbin/iptables -A INPUT -p udp --dport 137 -j DROP
/sbin/iptables -A INPUT -p udp --dport 138 -j DROP
/sbin/iptables -A INPUT -p tcp --dport 139 -j DROP
/sbin/iptables -A INPUT -p tcp --dport 445 -j DROP

/sbin/iptables -A INPUT -p udp --dport 1194 -j DROP

/sbin/iptables -A INPUT -p udp --dport 53 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 53 -j ACCEPT

/sbin/iptables -A INPUT -p icmp --icmp-type 8/0 -j DROP

/sbin/iptables -A INPUT -j DROP

/sbin/iptables -A OUTPUT -p tcp --dport 783 -j ACCEPT
/sbin/iptables -A OUTPUT -p tcp --dport 3000 -j ACCEPT

/sbin/iptables -A OUTPUT -p udp -d 86.132.220.168 -j ACCEPT
/sbin/iptables -A OUTPUT -p tcp -d 86.132.220.168 -j ACCEPT

/sbin/iptables -A OUTPUT -p tcp --dport 80 -j ACCEPT

/sbin/iptables -A OUTPUT -j ACCEPT

/sbin/iptables -A FORWARD -p tcp --dport 5060 -j ACCEPT
/sbin/iptables -A FORWARD -p udp --dport 5060 -j ACCEPT
/sbin/iptables -A FORWARD -p udp --dport 10000:20000 -j ACCEPT

/sbin/iptables -A FORWARD -j DROP

echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /usr/local/psa/var/modules/firewall/ip_forward.active
chmod 644 /usr/local/psa/var/modules/firewall/ip_forward.active

Any suggestions?

Thanks in advance,
   Andres