[advice needed] Iptables and fail2ban - RIPE NCC

Discussion in 'General' started by Apryaldy, Feb 14, 2018 at 2:11 AM.

  1. Apryaldy

    Apryaldy New Member

    Hi,

    I just paid attention on the fail2ban-log page, and saw something like this:
    2018-02-14 01:14:12,118 fail2ban.actions[871]: WARNING [postfix-sasl] Ban 37.49.225.161
    2018-02-14 01:24:12,806 fail2ban.actions[871]: WARNING [postfix-sasl] Unban 37.49.225.161

    there are many of them, i check on who.is, mostly the IP was come from RIPE NCC,
    I learn that using iptables, i could block them (iptables -A INPUT -s 37.0.0.0/8 -j DROP)

    but, just wondering, does I really need to do that?
    or just leave it be?
    will this effecting performance of the server in the future?

    Kindly need your advice.

    Thank you.
     

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