How to open up TCP ports in Linux/Windows OS-level Firewall?

if this host is designated as a receiver for establishing an H2H connection, the following system commands can be used to open up port 4996 for Inbound connection.

RHEL-based Linux 7+ (Redhat, CentOS, Amazon Linux, Rocky Linux, Fedora)

# firewall-cmd --add-port=4996/tcp --permanent
# firewall-cmd --reload

Debian-based Linux (Debian, Ubuntu)

ufw allow 4996/tcp

Microsoft Windows

Run the following commands in PowerShell to add new rules to Windows Firewall.

New-NetFirewallRule -DisplayName "ALLOW TCP PORT 4996 Inbound for CMC H2H" -Direction inbound -Profile Any -Action Allow -LocalPort 4996 -Protocol TCP

Note: These commands only open up OS-level firewalls. There may be other security components restricting the host's ability to communicate with other hosts for H2H connections. These components may include network-level firewalls, hypervisor-level firewalls, cloud security settings, etc. Contact your network administrator for detailed information.


Updated on: 11/07/2022

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