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Old 27th March 2017, 04:14 AM
tnsupport Offline
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Join Date: May 2016
Location: usa
Posts: 29
linuxfedorafirefox
f25 iptables default blocking

installed f25 on linode
after much trouble and many hours, and good help from the linode support team, found out that with F25, ports 80 and 443 were blocked (absent) in iptables

is this intentional ? How many people install Fedora Server with the intention of blocking web traffic ?

We think these ports should be unblocked as default and if there is concensus that they should be blocked then here are the commands to get the website working now.
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  #2  
Old 8th April 2017, 11:36 AM
wolfred Offline
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Join Date: Apr 2014
Location: Brooklyn
Posts: 48
linuxfedorafirefox
Re: f25 iptables default blocking

If you are using Fedora server as a mail server you would not need ports 80 and 443 open. From what I remember only port 22 is open by default. I think firewalld comes preinstalled on Fedora, not 100% sure. Did you disable firewalld and install iptabled-services ?

You can use the netstat command to see what ports are on, then allow those ports in iptables or firewalld
Code:
netstat -tupln
To open the ports with iptables
Code:
iptables -A INPUT -p tcp -m conntrack --ctstate NEW --dport 80 -j ACCEPT
iptables -A INPUT -p tcp -m conntrack --ctstate NEW --dport 443 -j ACCEPT
iptables -A OUTPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
The first one will accept new connections to port 80
The second one will accept new connections to port 443
the third command will allow established connections to go out.

Last edited by wolfred; 8th April 2017 at 12:27 PM.
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