If you want to see the open connections to port 25 on your virtual private server or dedicated server use:
netstat -an | grep 25
then you can block IP addresses that have many connections to your server trough the firewall.
If you want to see the open connections to port 25 on your virtual private server or dedicated server use:
netstat -an | grep 25
then you can block IP addresses that have many connections to your server trough the firewall.
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