Archive for April, 2018

22
Apr

   Posted by: RobPatton   in Linux/Hosting

The Problem

In the past 30 days, I’ve seen over 140,000 entries from many unique ips, which looks like either DOS or password hacking bots, annoying, especially since all my passwords are at least 12 char, random.

 

Top 10 Values Count %
162.17.140.61 8,259 5.844%
212.237.47.114 4,583 3.243%
185.227.108.10 1,560 1.104%
192.154.213.123 1,434 1.015%
110.87.25.235 1,356 0.96%
120.35.102.81 1,356 0.96%
117.69.231.207 1,332 0.942%
183.164.244.109 1,327 0.939%
117.69.230.159 1,297 0.918%
117.69.230.216 1,288 0.911%

 

In /var/log/maillog

Apr 22 07:43:21 webhost postfix/smtpd[12521]: lost connection after AUTH from unknown[114.237.43.12]
Apr 22 07:43:19 webhost postfix/smtpd[12521]: lost connection after AUTH from unknown[114.237.43.12]
Apr 22 07:43:17 webhost postfix/smtpd[12521]: lost connection after AUTH from unknown[114.237.43.12]
Apr 22 07:43:14 webhost postfix/smtpd[12521]: lost connection after AUTH from unknown[114.237.43.12]
Apr 22 07:43:08 webhost postfix/smtpd[12521]: lost connection after AUTH from unknown[114.237.43.12]
Apr 22 07:43:06 webhost postfix/smtpd[12521]: lost connection after AUTH from unknown[114.237.43.12]
Apr 22 07:04:24 webhost postfix/smtpd[29802]: lost connection after HELO from unknown[119.86.182.130]
Apr 22 06:35:16 webhost postfix/smtpd[18488]: lost connection after UNKNOWN from unknown[93.174.93.46]

The Fix

Add to /etc/fail2ban/jail.local:

[postfix-auth]
enabled = true
filter = postfix.auth
action = iptables-multiport[name=postfix, port=”http,https,smtp,submission,pop3,pop3s,imap,imaps,sieve”, protocol=tcp]
# sendmail[name=Postfix, dest=you@mail.com]
logpath = /var/log/maillog
bantime = 21600
maxretry = 3

Create /etc/fail2ban/filter.d/postfix.auth.conf

[Definition]
failregex = lost connection after AUTH from (.*)\[\]
ignoreregex =

Problem Solved!

20
Apr

   Posted by: RobPatton   in Arcade Video Games

Finally got around to picking up one of these gears and getting it swapped out on my 1981 Star Wars arcade machine.  Orig being plastic over alum, new being all cnc alum.