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This tutorial describes how to close an Open DNS server. An Open DNS server allows anyone to use that server as a DNS lookup server. This is a potential threat and such access must either be blocked, or restricted to a few trusted IPs. This is how it is done. 1. Make a list . . . → Read More: How to close Open DNS  2 comments  Tips n Tricks  close, cpanel, disable, DNS, email alert, how to, install, loader, open, php, root, telnet Telnet is a xinetd managed service which listens on port 23. You can login to your account on the server by using a telnet client. However, unlike ssh, telnet initiates a normal connection. i.e., the telnet data packets is in plain-text format, and can be captured easily by network monitoring applications. If you are . . . → Read More: How to disable Telnet |
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