To test an iptables script remotely, you can use the iptables-apply command. This command allows you to apply an iptables script to a remote system over SSH, without the need to log in to the system or copy the script to the remote system.
To use iptables-apply, you will need to have SSH access to the remote system and the iptables-apply command installed on both the local and remote systems.
To apply an iptables script to a remote system, you can use the following command:
iptables-apply -R remote_user@remote_system /path/to/iptables.script
Replace remote_user with the username for the remote system, remote_system with the hostname or IP address of the remote system, and /path/to/iptables.script with the path to the iptables script on the local system.
The -R option tells iptables-apply to apply the script to the remote system.
You can also use the -t option to specify a table other than the default filter table. For example, to apply the script to the nat table on the remote system, you can use the following command:
iptables-apply -R -t nat remote_user@remote_system /path/to/iptables.script