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How to prevent Telnet to a Server from specific IP Address

Discussion in 'Linux Networking' started by jaomedes, Dec 13, 2011.

  1. jaomedes

    jaomedes Guest

    Hello,

    How can I prevent telnet to a server from an specific IP Address?

    Thanks


     
  2. Rob

    Rob Guest

    Hi, welcome to LinuxForum!

    You could use the hosts.deny file:

    telnet: 1.2.3.4

    Is this a server facing the internet though? You should be uaing ssh instead.

    Good luck,
    Rob
     
  3. ehansen

    ehansen Guest

    I know this is an old-ish thread, but it is relevant to what Rob said.

    I've been noticing some distros (i.e.: Arch Linux) switching to a different system of filtering traffic and getting rid of tcp_wrappers (hosts.deny/hosts.allow) completely. So, this is something to consider as well.
     
  4. carbon333

    carbon333 Guest

    The safest and most powerful method would be denying it using iptables.
     
  5. ehansen

    ehansen Guest

    Depends. If it's an external connection then rejecting the connection at the router segment would be better and cause less overhead via iptables.
     

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