On Thu, Jan 09, 2020 at 11:49:59AM +0530, Thomas Stephen Lee wrote: > On Thu, Jan 9, 2020 at 6:07 AM H <agents at meddatainc.com> wrote: > > > I am being attacked by an entire subnet where the first two parts of the > > IP address remain identical but the last two parts vary sufficiently that > > it is not caught by fail2ban since the attempts do not meet the cut-off of > > a certain number of attempts within the given time. > > > > Has anyone created a fail2ban filter for this type of attack? As of right > > now, I have manually banned a range of IP addresses but would like to > > automate it for the future. > > > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > https://lists.centos.org/mailman/listinfo/centos > > > Hi, > > I am not an expert but, > you can try creating an ipset with the the range you need and do a drop in > iptables or firewalld. > We have used ipsets with bare iptables in CentOS 6, and firewalld in CentOS > 7. > fail2ban also uses ipsets in CentOS 7. > Ditto, both in C6 and C7. jl -- Jon H. LaBadie jon at jgcomp.com 11226 South Shore Rd. (703) 787-0688 (H) Reston, VA 20190 (703) 935-6720 (C)