how to protect telnet access to smtp port 25?
- by Michael Mao
Hi all:
Please consider the following:
192-168-1-106:~ michael$ telnet <remote_server_ip> 25
Trying <remote_server_ip>...
Connected to li*****.linode.com.
Escape character is '^]'.
220 mindinscription.net ESMTP Postfix (Ubuntu)
quit
221 2.0.0 Bye
Connection closed by foreign host.
Is this very bad? how to protect port 25 from…