client wont register if i enable iptables

Im new to iptables, im hardening a little bit my asterisk security by installing fail2an and enabling iptables.
the problem is when i enable iptables, softphones will not register, which entries should i do and how should i add those entries in iptables?

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Alex BaharConnect With a Mentor Commented:
IPtables setup for Asterisk
# SIP port 5060
iptables -A INPUT -p udp -m udp --dport 5060 -j ACCEPT
iptables -A INPUT -p tcp -m tcp --dport 5060 -j ACCEPT

# IAX2- the IAX protocol
iptables -A INPUT -p udp -m udp --dport 4569 -j ACCEPT

# IAX - IAX v2
iptables -A INPUT -p udp -m udp --dport 5036 -j ACCEPT

# RTP - the media stream
iptables -A INPUT -p udp -m udp --dport 10000:20000 -j ACCEPT
Jan SpringerCommented:
cat /etc/sysconfig/iptables

what protocol (tcp or udp) and what port do the phones need to connect to on the asterisk service?
Alex BaharCommented:
I suggest you to look at which packets/ports are blocked for the IPphones. Then open/allow these ports/protocols in your iptables configuration.
The trick on the following links may help 
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manolocruzAuthor Commented:
Jesper, we need TCP 5060 UDP 5060 UDP 10000-20000
manolocruzAuthor Commented:
Abahar, im checking the links, hit you back in a few minutes.
Jan SpringerConnect With a Mentor Commented:
affirmative with abahar's example (start iptables before adding the rules).

verify the name of your "input" chain and if using unnumbered list (my "input" chain is 'RH-Firewall-1-INPUT') with an explicit deny at the end:

   iptables -D RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
   iptables -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited

if you're using a redhat release (rhel, fedora, centos):

   service iptables save
manolocruzAuthor Commented:
here is my /etc/sysconfig/iptables file.

# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j RH-Firewall-1-INPUT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT
-A RH-Firewall-1-INPUT -p 50 -j ACCEPT
-A RH-Firewall-1-INPUT -p 51 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp --dport 5353 -d -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
Jan SpringerCommented:
iptables -A RH-Firewall-1-INPUT -p udp -m udp --dport 5060 -j ACCEPT
iptables -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 5060 -j ACCEPT
iptables -A RH-Firewall-1-INPUT -p udp -m udp --dport 4569 -j ACCEPT
iptables -A RH-Firewall-1-INPUT -p udp -m udp --dport 5036 -j ACCEPT
iptables -A RH-Firewall-1-INPUT -p udp -m udp --dport 10000:20000 -j ACCEPT
iptables -D RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
iptables -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited

service iptables save

You can copy and paste everything above this sentence.
manolocruzAuthor Commented:
right now system is in production, i will do that in about 3 hours...
and test it, after that will install fail2ban...
Any other recommendation to make my server safer?
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