once in a while i need to review which database accounts are used, from what IPs connections arrive. MySQL / MariaDB does not have built-in mechanism [ unless you want to allow full query log ], but there’s quite easy way to get the data.
i’ve spent most of the last week investigating spooky HTTP request that we’ve found in access logs of few production servers. very likely that traffic was replayed by mail content scanners used by messagelabs and mimecast.
UPC turns your cable modem into WiFi hot-spot available for others. outrageous! and i’ve been using it for quite a while – it generally works. below – how to connect OpenWRT or Mikrotik to such connection.
after an upgrade to debian buster i’ve noticed that both iostat -x 1 and munin’s diskstats_utilization report that NVMe drives are busy most of the time. some empirical tests showed that disks are actually idle, performance did not drop. upgrade to 5.2 kernel resolved the miss-reporting issue.
after upgrade to debian stretch i had to add the following firewall entries: for the FTP servers: for the nat-routers between FTP servers and FTP clients: for the FTP clients: related articles: https://home.regit.org/netfilter-en/secure-use-of-helpers/