SOLVED IPtables won't start with FQDN

bobmats

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I had done a fresh centos 7 and incredible pbx 11.4 install.

I had a trunk problem that is now solved.
I was now checking access to the pbx using the firewall rules.
I noticed using a non allowed ip I could access the web interface.

For some reason the firewall does not seem to be activated when starting the server.
I restarted the server same, no firewall.

web going to firewall settings in webmin I can see that all firewall rules are in place.
When I press apply configuration the rules are applied and firewall is working.
When doing a reboot firwall is not activated

How can I set the firewall to be activated on boot.
 

wardmundy

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Run the command iptables-restart and see if you get an error condition.
 

bobmats

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No this did not gave an error and restarted the tables.

Just dit a new install centos 7
installed incredible pbx 11.4
login in ssh, some scripte updated vunrabilities.
menu showed firewall was up.
added 4 fqdn dyndns addresses
changed /root/ipchecker to add these 4 to name.iptables
added */10 * * * * root /root/ipchecker > /dev/null to crontab
reboot
logged in using ssh

menu showed iptables red, down

run iptables-restart, did work no errors
logged in using ssh again
iptables green

reboot
logged in using ssh
iptables-restart
everything is fine

Is there another way to restart the ip tables automatically
 

bobmats

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Replicated the problem

Fresh install again on vps
vps has fresh centos 7 image
everyting works fine.
reboot twice after install
everything works fine iptables is up

./add--fqdn name name.dyndns.org
selected 0 all services for the local ip

reboot
iptables is down

iptables-restart > IPtabless started OK without bad rules noted above.

I assume the add-fqdn command does change something making the iptables not load when starting.
 

phonebuff

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Did you run IPChecker manually to see what happens --

You did modify
 

bobmats

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Did fresh install again this morning, made snapshot now of fresh install so I can get back to fresh install

Everything works fine untill I add a dynamic ip thru
./add-fqdn name name.dyndns.org
modified ipchecker to add name.iptables to ipchecker

when running ./ipchecker is says account name.iptables ok

when doing a reboot
the firewall does not load
when doing ipchecker after reboot everything is ok
have to do a manual iptables-restart to get the firewall up and running

Is there another option to add iptables-restart to run at reboot ?

This is getting a bit annoying
Will try to replicate this on a VM if I have some more time. Costing be to many hours already now.
 

wardmundy

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It appears you are injecting BAD CODE into the iptables setup. What specifically are you typing in the add-fqdn command??

If you have BAD CODE in your iptables setup, iptables will NOT start on bootup. That's the reason for running iptables-restart while the system is running. You then need to fix any errors it identifies before rebooting. Then run iptables-restart again until you get a clean setup. Then reboot and all should be well.
 

bobmats

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Ward,

This morning I did fresh install.
Reboot so that security update could be done
reboot again

logged in using ssh
cd /root
./add-fqdn myname myname.dyndns.org
went thru selection and selected 1,2,3 for sip aix
added myname.iptables to ipchecker
reboot
error firewall does not start.
so the only thing I did after fresh install was add a dyndns address thru ./add-fqdn

manual restart firewall is ok.

when I run ipchecker no error
when I run ip-tables-restart no problem

Below if content of ip tables:
in the dyndns section I recplaced my realname for myname
 

bobmats

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Code:
# Generated by iptables-save v1.4.7 on Fri Mar 2 10:36:08 2012
*nat
:pREROUTING ACCEPT [7:608]
:pOSTROUTING ACCEPT [36:2319]
:OUTPUT ACCEPT [36:2319]
COMMIT
# Completed on Fri Mar 2 10:36:08 2012
# Generated by iptables-save v1.4.7 on Fri Mar 2 10:36:08 2012
*mangle
:pREROUTING ACCEPT [1103:1400664]
:INPUT ACCEPT [1102:1400632]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [656:59330]
:pOSTROUTING ACCEPT [656:59330]
COMMIT
# Completed on Fri Mar 2 10:36:08 2012
# Generated by iptables-save v1.3.5 on Tue Apr 1 11:35:49 2014
*filter
:INPUT DROP [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
# don't mess with the fail2ban entries or you'll break Fail2Ban
:fail2ban-APACHE - [0:0]
:fail2ban-ASTERISK - [0:0]
:fail2ban-BadBots - [0:0]
:fail2ban-SSH - [0:0]
:fail2ban-VSFTPD - [0:0]
-A INPUT -p tcp -m tcp --dport 21 -j fail2ban-VSFTPD
-A INPUT -p tcp -m multiport --dports 80,443 -j fail2ban-BadBots
-A INPUT -p tcp -j fail2ban-APACHE
-A INPUT -j fail2ban-ASTERISK
-A INPUT -p tcp -m tcp --dport 22 -j fail2ban-SSH
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m tcp --tcp-flags ACK ACK -j ACCEPT
-A INPUT -m state --state ESTABLISHED -j ACCEPT
-A INPUT -m state --state RELATED -j ACCEPT
-A INPUT -p udp -m udp --sport 53 --dport 1024:65535 -j ACCEPT
-A INPUT -p icmp -m icmp --icmp-type 0 -j ACCEPT
-A INPUT -p icmp -m icmp --icmp-type 3 -j ACCEPT
-A INPUT -p icmp -m icmp --icmp-type 4 -j ACCEPT
-A INPUT -p icmp -m icmp --icmp-type 11 -j ACCEPT
-A INPUT -p icmp -m icmp --icmp-type 12 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 113 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 1723 -j ACCEPT
-A INPUT -p udp -m udp --dport 4569 -j ACCEPT
-A INPUT -p udp -m udp --dport 10000:20000 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 32976 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 4445 -j ACCEPT
-A INPUT -p udp -m udp --dport 123 -j ACCEPT
-A INPUT -p udp -m udp --dport 69 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 9022 -j ACCEPT
-A INPUT -p udp -m udp --dport 5353 -j ACCEPT
#-A INPUT -p tcp -m tcp --dport 21 -j ACCEPT
#-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
#-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
#-A INPUT -p tcp -m tcp --dport 83 -j ACCEPT
#-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
#-A INPUT -p tcp -m tcp --dport 5038 -j ACCEPT
#-A INPUT -p tcp -m tcp --dport 9001 -j ACCEPT
#-A INPUT -p tcp -m tcp --dport 9080 -j ACCEPT
# Opening up unlimited SIP access can be very dangerous
# Commented next entry locks SIP down to Trusted Providers
#-A INPUT -p udp -m udp --dport 5050:5082 -j ACCEPT
 

bobmats

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# Here's the Incredible PBX list of SIP Trusted Providers

Code:
-A INPUT -s 64.2.142.215/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.216/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.9/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.17/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.18/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.29/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.87/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.106/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.107/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.109/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.111/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.187/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.188/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.189/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.190/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.214/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.2.142.26/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 199.101.184.146/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 174.34.146.162/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 173.208.83.50/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 74.54.54.178/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 209.62.1.2/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 67.215.241.250/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 74.63.41.218/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 69.147.236.82/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 68.233.226.97/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 67.205.74.184/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 67.205.74.187/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 174.137.63.206/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 174.137.63.202/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 5.77.36.136/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 204.11.192.32/30 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 204.155.28.10/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.136.174.24/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.136.174.24/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 64.34.181.47/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 69.90.174.98/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 85.17.186.7/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069 -j ACCEPT
-A INPUT -s 81.23.228.129/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069 -j ACCEPT
-A INPUT -s 67.228.182.2/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069 -j ACCEPT
-A INPUT -s 64.251.23.244/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 85.17.148.32/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 63.211.239.14/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 63.247.78.218/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 8.3.252.23/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 8.14.120.23/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 8.17.37.23/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 66.54.140.46/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
-A INPUT -s 66.54.140.47/32 -p udp -m multiport --dports 5060,5061,5062,5063,5064,5065,5066,5067,5068,5069,4569 -j ACCEPT
# and a few more...
-A INPUT -s 64.62.236.143/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 24.211.64.206/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 199.30.56.194/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 209.216.15.70/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 209.216.2.211/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 184.154.97.11/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 81.23.228.150/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 81.23.228.150/32 -p tcp -m tcp --dport 5060:5069 -j ACCEPT
-A INPUT -s 65.254.44.194/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 74.81.71.18/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 50.22.101.14/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 67.212.84.21/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 176.9.39.206/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 72.9.149.25/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 50.22.102.242/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 98.254.157.185/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 178.63.143.236/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 98.254.157.185/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
-A INPUT -s 64.2.142.26/32 -p udp -m udp --dport 5060:5069 -j ACCEPT
# End of Trusted Provider Section
# // New entry for myname.iptables
-A INPUT -p udp -m udp -s myname.dyndns.org --dport 5060:5069 -j ACCEPT
-A INPUT -p tcp -m tcp -s myname.dyndns.org --dport 5060:5069 -j ACCEPT
-A INPUT -p udp -m udp -s myname.dyndns.org --dport 4569 -j ACCEPT
# // End entry for myname.iptables
# Kitchen Sink entries below give full access to all server ports
-A INPUT -s 10.0.0.0/8 -j ACCEPT
-A INPUT -s 127.0.0.0/8 -j ACCEPT
# The 172 subnet leaves a security hole on Amazon EC2 so it's disabled
#-A INPUT -s 172.16.0.0/12 -j ACCEPT
-A INPUT -s 192.168.0.0/16 -j ACCEPT
# next 3 entries are your server, user, and public IP addresses
# this is a snapshot of where you were when you installed Incredible PBX
# It assures that you can log back in from there once we lock down IPtables
# NO RESTRICTIONS are placed on these 3 addresses or private LAN subnets!
# The IP addresses are your server, user, and public addresses respectively
-A INPUT -s 37.34.54.69 -j ACCEPT
-A INPUT -s 78.21.106.76 -j ACCEPT
-A INPUT -s 37.34.54.69 -j ACCEPT
# your own additions go above here
# don't mess with the fail2ban entries below or you'll break Fail2Ban
-A fail2ban-APACHE -j RETURN
-A fail2ban-ASTERISK -j RETURN
-A fail2ban-BadBots -j RETURN
-A fail2ban-SSH -j RETURN
-A fail2ban-VSFTPD -j RETURN
COMMIT
# Generated by iptables-save v1.3.5 on Tue Apr 1 11:35:49 2014
 

bobmats

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Just tried
after reboot logged in ssh and menu showing iptables DN in red

ipchecker showing = ok
iptables-restart = ok no bad rules notes above
 

bobmats

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Kept on trying and seemed to have found a solution

Just loggend in ssh

service iptables save
service ip tables stop
servcce iptables start

reboot
iptables are up
added a fqdn
reboot
ip tables remain up

For some reason I have to give the manual command service iptables save
this seemed to do the trick.
all in all really very strange behaviour.
 

bobmats

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1 problem solved but next problem happens

Checked if one of my dyndns ip's gets updated so I can loggin.

manually did ./ipchecker and this updates the new ip
problem there is iptables does not get this new ip
iptables-restart does not work
service iptables stop
service iptables start
seems to do the job and enables me to register.

ipchecker was added to the cron job but the firewall does not seem to accept the updates.

one problem solved next happens.
 

bobmats

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ok so this does bring me back to point 1 iptables will not load on a fresh install after adding 1 fqdn
 

wardmundy

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bobmats: Sorry I haven't been more responsive. We've been traveling. I'm starting to wonder if the IPtables release in CentOS 7 has changed something that permanently breaks using FQDNs. The only other possibility is that you've used a reserved word in your FQDN that sends IPtables out to lunch. Please send me a private message with the actual FQDN you are using so we can try it. In the meantime, we'll do some further testing. If there is no error condition and IPtables still won't load, that is a MAJOR problem using FQDNs obviously. Thanks for the heads up.

Just to document where we are on the CentOS 7 platform...

1. If FQDN entry is added to IPtables using add-fqdn, IPtables will work properly using the manual command: iptables-restart

2. On subsequent boot which executes "service iptables start" IPtables fails to start.

3. Doing a manual iptables-restart brings it back to life.

4. Verified IPtables was or was not loading in above steps with iptables -nL

5. Issuing "service iptables save" solves the problem but wipes out FQDN entries in IPtables file.
 

wardmundy

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(UNTESTED) SHORT TERM FIX:

1. Edit /etc/rc.local.
2. Just above the last line in the file, insert the following, save the file, reboot, and report results.
Code:
/usr/local/sbin/iptables-restart
 

matthew

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I don't have Centos 7 to test with, but it's not unusual for iptables to start before the network is configured. That is so there isn't a small moment in time when your system is unprotected by a firewall. The upshot is, without a network, you can't resolve any FQDNs you might have in your iptables config.

I'm just on my way out the door. Hope I didn't get the wrong end of the stick.
 

bobmats

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No even after 20 minutes firewall is still down.
That said when 1 of my fqdn ip changes this will issue a firewall restart and firewall will be up. A restart command will activate the iptables. After startup/reboot iptables are not activated.
If fqdn does not change firewall will remain down.
I am using a vps and fresh clean centos7 install from my vps provider. Option could be their image is wrong but this, I can't check.

2 days ago I have donw the only last option which was install pbxinaflash using centos 6.5 > update to 6.6 freepbx 11 / asterisk 11
This now works and everything is in place.

This only leaves me with the conclusion that it's better to stick with some older distro's that have been tested and known to work.
The contos 7 might work but in my case gave to many problems like this.
The same applied to incredible pbx12/ ubunutu 14 which also had some security issues

all problems are gone now using pbx in a flash.

I even wonder when installing pbxinaflash there was also the option to install freepbx12/asterisk12 if this would work better. I might do this on a vm to test.

For now this thread can be closed.
Everyone thank you for your help.
 

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