Linux: Difference between revisions

544 bytes added ,  21 April 2020
→‎Networking: opening and closing ports
→‎Networking: opening and closing ports
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| Scan a network for connected computers  
| Scan a network for connected computers  
| class="cli" | sudo nmap -sP 129.24.22.0/24
| class="cli" | $ sudo nmap -sP 129.24.22.0/24
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|}
== Firewall ==
{| class="wikitable" border="1" style="border-collapse:collapse"
! style="text-align: center;"| Description
! Command
! Distro
|-
|-
| Open a firewall port
| Open a firewall port
| class="cli" | sudo firewall-cmd --zone=public --add-port=55301/tcp --permanent
| class="cli" | $ sudo ufw allow 55301
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|-
| Open a firewall port
| class="cli" | $ sudo firewall-cmd --zone=public --add-port=55301/tcp --permanent<br>$ sudo firewall-cmd --reload
| {{testedon|2020-04-21|CentOS 7.7.1908}}
|-
| Close a firewall port
| class="cli" | $ sudo ufw deny 55301
| {{testedon|2020-04-21|CentOS 7.7.1908}}
|-
| Close a firewall port
| class="cli" | $ sudo firewall-cmd --zone=public --remove-port=55301/tcp --permanent<br>$ sudo firewall-cmd --reload
| {{testedon|2020-04-21|CentOS 7.7.1908}}
| {{testedon|2020-04-21|CentOS 7.7.1908}}
|}
|}