I had old UPS with serial port which was connected using Profilic USB to serial adapter. Sometimes this USB dongle had frozen and need to be restated – re-attached. This can be done in linux using IOCTL.
After recent security updates, my webmin (now 1.903) served trough haproxy stopped working. Login page was not loading correctly… Continue reading
Recent Windows 10 (since 1809) can behave weird (slow) when running on ESXi.
LSI Logic SAS2008 adapters still supported in ESXi 6.7. This cards are cheap and still used in many home labs like mine. For ESXi is available management utility sas2ircu (Broadcom/Raid/SAS 9217-8I/Downloads Management Software and Tools).
There has been some comments in my old posts trying to use generated country lists in Apache .htaccess. This approach is wrong, and I will show you much better way how to block or allow specific country.
My original article about this topic is more that year old and was using Regional Internet Registries (RIRs) list as source and was in python. This post will describe other simple solution how to generate some country IP ranges list.
Using vmware and snapshots? You probably know about vmware best practices about snapshots, which includes
- The maximum supported amount of snapshots in a chain is 32. However, VMware recommends that you use only 2-3 snapshots in a chain.
- Use no single snapshot for more than 24-72 hours. Snapshots should not be maintained over long periods of time for application or Virtual Machine version control purposes.
- An excessive number of delta files in a chain (caused by an excessive number of snapshots) or large delta files may cause decreased virtual machine and host performance.
- Be especially diligent with snapshot use on high-transaction virtual machines such as email and database servers
But what is real performance inpact of snapshot?
Have you tried to place your Dropbox folder on network (NAS) drive? Dropbox don’t allow it directly, but there is hack…
I have just found very interesting post on reddit about 8GB FC vs 10GB iSCSI. Continue reading
This my blog and also other hosted websites running WordPress are target of bots trying passwords to wordpress admin and posting spam comments. I was unable to found simple plugin for comments dns blacklist, so I focused to mod-security. Continue reading