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Firewall randomly blocking custom defined ports

Wizzie

Wizzie

New Pleskian
Hello there,

I have the web pro edition panel 12 on centos 6.5 64bit, and i have made some custom firewall rules in order to be able to run a teamspeak server.
The problem is that the firewall randomly blocks the teamspeak port and keeps it blocked unless i restart the firewall.

Any suggestions?
 
to be more specific, this is my iptables file:

#!/bin/sh
#ATTENTION!
#
#DO NOT MODIFY THIS FILE BECAUSE IT WAS GENERATED AUTOMATICALLY,
#SO ALL YOUR CHANGES WILL BE LOST THE NEXT TIME THE FILE IS GENERATED.

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-save -t filter | grep -- "-A INPUT" | grep -v fail2ban | sed -e "s#^-A#/sbin/iptables -D#g" | sh
/sbin/iptables -F FORWARD
/sbin/iptables -F OUTPUT
/sbin/iptables -Z FORWARD
/sbin/iptables -Z OUTPUT
/sbin/iptables -P INPUT DROP
/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/iptables -A INPUT -p tcp ! --syn -m state --state NEW -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 -m state --state NEW -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 -m state --state NEW -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 -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/ip6tables-save -t filter | grep -- "-A INPUT" | grep -v fail2ban | sed -e "s#^-A#/sbin/ip6tables -D#g" | sh
/sbin/ip6tables -F FORWARD
/sbin/ip6tables -F OUTPUT
/sbin/ip6tables -Z FORWARD
/sbin/ip6tables -Z OUTPUT
/sbin/ip6tables -P INPUT DROP
/sbin/ip6tables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp ! --syn -m state --state NEW -j REJECT --reject-with tcp-reset
/sbin/ip6tables -A INPUT -m state --state INVALID -j DROP
/sbin/ip6tables -P OUTPUT DROP
/sbin/ip6tables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/ip6tables -A OUTPUT -p tcp ! --syn -m state --state NEW -j REJECT --reject-with tcp-reset
/sbin/ip6tables -A OUTPUT -m state --state INVALID -j DROP
/sbin/ip6tables -P FORWARD DROP
/sbin/ip6tables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/ip6tables -A FORWARD -p tcp ! --syn -m state --state NEW -j REJECT --reject-with tcp-reset
/sbin/ip6tables -A FORWARD -m state --state INVALID -j DROP
/sbin/ip6tables -A INPUT -i lo -j ACCEPT
/sbin/ip6tables -A OUTPUT -o lo -j ACCEPT
/sbin/ip6tables -A FORWARD -i lo -o lo -j ACCEPT
/sbin/ip6tables -t mangle -F
/sbin/ip6tables -t mangle -Z
/sbin/ip6tables -t mangle -P PREROUTING ACCEPT
/sbin/ip6tables -t mangle -P OUTPUT ACCEPT
/sbin/ip6tables -t mangle -P INPUT ACCEPT
/sbin/ip6tables -t mangle -P FORWARD ACCEPT
/sbin/ip6tables -t mangle -P POSTROUTING ACCEPT
/sbin/iptables -t nat -F
/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 50002 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 50002 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 24477 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 24477 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 50000 -j ACCEPT
/sbin/iptables -A INPUT -p udp --dport 50000 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 50000 -j ACCEPT
/sbin/ip6tables -A INPUT -p udp --dport 50000 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 50001 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 50001 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 12443 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 12443 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 11443 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 11444 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 11443 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 11444 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 8447 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 8447 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 8443 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 8880 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 8443 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 8880 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 443 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 80 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 443 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 21 -j DROP
/sbin/ip6tables -A INPUT -p tcp --dport 21 -j DROP

/sbin/iptables -A INPUT -p tcp --dport 22 -j DROP
/sbin/ip6tables -A INPUT -p tcp --dport 22 -j DROP

/sbin/iptables -A INPUT -p tcp --dport 587 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 587 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 25 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 465 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 25 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 465 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 110 -j DROP
/sbin/iptables -A INPUT -p tcp --dport 995 -j DROP
/sbin/ip6tables -A INPUT -p tcp --dport 110 -j DROP
/sbin/ip6tables -A INPUT -p tcp --dport 995 -j DROP

/sbin/iptables -A INPUT -p tcp --dport 143 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 993 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 143 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 993 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 106 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 106 -j ACCEPT

/sbin/iptables -A INPUT -p tcp --dport 3306 -j DROP
/sbin/ip6tables -A INPUT -p tcp --dport 3306 -j DROP

/sbin/iptables -A INPUT -p tcp --dport 5432 -j DROP
/sbin/ip6tables -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/ip6tables -A INPUT -p tcp --dport 9008 -j DROP
/sbin/ip6tables -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/ip6tables -A INPUT -p udp --dport 137 -j DROP
/sbin/ip6tables -A INPUT -p udp --dport 138 -j DROP
/sbin/ip6tables -A INPUT -p tcp --dport 139 -j DROP
/sbin/ip6tables -A INPUT -p tcp --dport 445 -j DROP

/sbin/iptables -A INPUT -p udp --dport 1194 -j ACCEPT
/sbin/ip6tables -A INPUT -p udp --dport 1194 -j ACCEPT

/sbin/iptables -A INPUT -p udp --dport 53 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 53 -j ACCEPT
/sbin/ip6tables -A INPUT -p udp --dport 53 -j ACCEPT
/sbin/ip6tables -A INPUT -p tcp --dport 53 -j ACCEPT

/sbin/ip6tables -A INPUT -p icmpv6 --icmpv6-type 134/0 -j ACCEPT
/sbin/ip6tables -A INPUT -p icmpv6 --icmpv6-type 135/0 -j ACCEPT
/sbin/ip6tables -A INPUT -p icmpv6 --icmpv6-type 136/0 -j ACCEPT
/sbin/ip6tables -A INPUT -p icmpv6 --icmpv6-type 137/0 -j ACCEPT

/sbin/iptables -A INPUT -p icmp --icmp-type 8/0 -j ACCEPT
/sbin/ip6tables -A INPUT -p icmpv6 --icmpv6-type 128/0 -j ACCEPT
/sbin/ip6tables -A INPUT -p icmpv6 --icmpv6-type 129/0 -j ACCEPT

/sbin/iptables -A INPUT -j DROP
/sbin/ip6tables -A INPUT -j DROP

/sbin/iptables -A OUTPUT -j ACCEPT
/sbin/ip6tables -A OUTPUT -j ACCEPT

/sbin/iptables -A FORWARD -j DROP
/sbin/ip6tables -A FORWARD -j DROP

echo 1 > /proc/sys/net/ipv4/ip_forward
#
# End of script
#


It is randomly blocking ports and i do not know why! Any suggestions?
 
Hello there IgorG,

I've talked to the teamspeak support team and they told me that the settings are ok (yes i know that i have changed the default ports to avoid scanners and further arising problems).
Now i've turned back to you to ask about this issue.
 
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