Firewall: Difference between revisions
From Leo's Notes
This page was last edited on 9 October 2019, at 20:04.
Created page with "== Linux == Linux typically uses IPTables for its firewall. On most modern Linux distributions, IPTables is controlled through another program or manager such as firewalld, or..." |
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=== Opening a Port === | === Opening a Port === | ||
To allow a specific port access to your machine, you will (most likely) need to make IPTables ACCEPT traffic meeting the port criteria on the INPUT chain. | To allow a specific port access to your machine, you will (most likely) need to make IPTables {{code|ACCEPT}} traffic meeting the port criteria on the {{code|INPUT}} chain. | ||
Simple IPTables: | Simple IPTables: | ||
Revision as of 20:04, 9 October 2019
Linux
Linux typically uses IPTables for its firewall. On most modern Linux distributions, IPTables is controlled through another program or manager such as firewalld, or CSF.
Opening a Port
To allow a specific port access to your machine, you will (most likely) need to make IPTables ACCEPT traffic meeting the port criteria on the INPUT chain.
Simple IPTables:
# iptables -A INPUT -p tcp --dport 80 -j ACCEPT
If using Red Hat's firewalld:
# firewall-cmd --permanent --add-port=80/tcp
# firewall-cmd --permanent --add-service=x
## Reload firewall rules
# firewall-cmd --reload
If using CSF:
# vi /etc/csf/csf.conf
## Edit 'TCP_IN' to include any TCP traffic IN, or TCP_OUT for traffic out.
## Reload CSF
# csf -r