• blocking IPs was:FidoGaz

    From Mike Miller@1:154/30 to NANCY BACKUS on Fri Jul 27 01:25:02 2018
    Hello NANCY!

    18 Oct 16 11:38, you wrote to me:

    Quoting Mike Miller to Daryl Stout on 10-08-16 01:54 <=-

    Other Sysops have changed their telnet ports as well...but I'm
    not sure how other telnet BBS software is handling these bots.

    I set up a script that blacklists any IP that connects to a port
    more than 5 times in a couple minutes. iptables blocks the
    address for a few hours. If it continues trying after 3
    temporary blocks, the IP is permanently blocked.

    That can backfire on a legitimate caller, though... If my telnet
    "dialer" times out on me, I will retry a time or two, possibly within
    that couple of minutes.... certainly again within the next hour or
    two, just in case things are just being slow... I think in some cases,
    it may actually connect but so close to the timeout that I couldn't
    tell for sure.... I'm using a DOS telnet client, Conex....

    There may be fringe cases, but I believe I have it tweaked enough that something like that won't be caught.

    And I can always whitelist certain IP addresses.

    Mike


    ... Who is General Failure, and *WHY* is he reading my disk?
    --- GoldED+/LNX 1.1.5-b20160322
    * Origin: War Ensemble - warensemble.com - Appleton, WI (1:154/30)