The Mergy Notes

content + info + hacks + solutions

Latest Notes

Hostile or Compromised IPs List Update, December 16, 2017 (a.k.a. my fail2ban list)

Wow, you let fail2ban do it’s thing on an SMTP jail and you can stack up bad IPs pretty quickly. As a follow-up to the other post on fail2ban setups and bad IPs, here is the current collected list. These IPs have all tried to compromise my server over the last few months. If you’re here because you searched for an IP address, they probably are attacking you as well. 
 

MySQL bottlenecks? Try tuning primer for mysql memory config tweaks

I recently inherited a Drupal site running on mysql and some pages were running VERY slowly. CPU was spiking on the server when the pages were loaded, or it just would time-out entirely. People were used to it, but the my.cnf was set years ago with only a few operators and the vm had doubled a couple of times over the last couple of years, so memory and CPU was available, but mysql was just not...

My Sessions at #Dreamforce2017

  I’m lucky enough to be in a couple of sessions this year at Dreamforce. Here are the links to find out more. Hope to see you there and if you can stop by and say, please do! Tuesday, November 7, 10:30 AM – 11:10 AM ——————————————————– Can’t Stop, Won’t...

Blocking garbage gTLDs with postfix header_checks

In looking at my Postfix mail.logs, I only see the new ICANN vanity gTLDs really generating garbage spam. Lots of press on the mess this all is causing. I got kind of sick of even dealing with that, so here is the header_checks lines I use to block them via postfix if you want to do that on your setup. There are a lot of articles on the internet for this, but I here is what works for me. YMMV...

fail2ban postfix-sasl bad ips list

I finally got around to enforcing some fail2ban work on all the sasl attack attempts. It was out of control. After a couple of weeks of running fail2ban with a postfix-sasl jail, attack traffic has really calmed-down after systematically only blocking around 230 IP addresses. No list is ever complete, but putting these out there now so when others search these, they get an additional nod that...

Fixing a damaged Jitterbit Agent setup on Windows

God knows what mess I made with all the updates and installs of Jitterbit on my main laptop running Windows 10 insider builds. But, whatever happened, things got pretty messed up. Jitterbit installers have not been kind to me so when updating the agent or studio, I’ve typically had to uninstall and reinstall. I hit a wall though recently and was stuck. The Jitterbit Agent would not install...

Fixing the Lenovo BIOS Update Utility “Driver Loading Failed. The Utility cannot proceed.” error

I just recently moved from a Lenovo Thinkpad T440 to a T470. Both great pieces of hardware and Windows 10 has been great along with the Linux subsystem. The T470 had a BIOS update I needed to run, but every which way I tried to run it, the ThinkPad BIOS Flash Update Utility would dish me the annoying: Driver Loading failed. The Utility cannot proceed.  This made it impossible to run the BIOS...

Fixing the intermittent pause or delays with Bluetooth mice

  For a long time, native Bluetooth mice were tough to come by. Apple’s Magic Mouse was all that was really being sold as a native Bluetooth mouse and you could use it for OSX and Windows machines. I used it for years. But, it could have a little delay every once and while no matter what laptop I used with it. I recently bought a couple of new native Bluetooth mice and noticed even...

Fixing Outlook 2013 “Outlook is unable to connect to the proxy server” errors on Windows 10

  Out of nowhere, I started to get some weird proxy server errors from Outlook 2013 to our Exchange on-prem servers. We knew the SSL certs were fine, it was just me getting the error and I’m running Windows 10 Insider Builds, so I figured it was just something stupid that changed.  “There is a problem with your proxy server’s security certificate. Outlook is unable to...