Today suddenly all incoming mails ware rejected by my mailserver. People contacted me with information, that they received undelivered notification with status of: 5.7.1 Service unavailable; Client host [SENDER IP] blocked using sbl-xbl.spamhaus.org; Error: open resolver; Now what the heck is open resolver? At first I
After switching to from 8.x to 9.x of ESET Security product and also Eset Web Console (On-prem), I started to receive warnings of push notifications servers not reachable. For this network and implementation is a mix of two or three things. 1. Clients have to be able to
It took me way too long than I want to admit. So here is a problem. After adding new device to cacti with properly configured SNMP, it detects interfaces, and graph title is constructed from its hostname, IP, name of interface and some static words like Traffic. This laeads to
truenas
I was blown away today while randomly checking something on my Windows Share with Family photos. When setting up TrueNAS I've ofcourse configured daily snapshots. To my knowledge, ZFS snapshots can be viewed when mounting in separate mount, then you can get old version or deleted file from
vpn
My rocksolid OpenVPN server dropped every connection at once. Quick inspection of logs on server shown: 2022-01-17 11:07:28 us=339922 MULTI: multi_create_instance called 2022-01-17 11:07:28 us=340120 x.x.x.x:65086 Re-using SSL/TLS context 2022-01-17 11:07:28 us=340967 x.x.
homeassistant
I just discovered this awesome self-hosted app called BookStack [https://www.bookstackapp.com/] while searching for something I can use to store all knowledge and instructions for myself from various of systems, networks, scripts etc. Luckily there is addon in Home Assistant. So installation is just as simple as few
unifi
I've spent countless hours debugging this, and solution is so simple... Context. I had an UniFI controller as an addon to Home Assistant on Raspberry Pi 4. It was working as expected for years. Then RPi 4 started to not be enough for my HA, and also other
I aquired old Dell PowerEdge R710, and wanted to give him second life as temporary NAS with 15k SAS drives. As it was provided as is there ware password on iDrac that I didn't know, so I reset to factory defaults. After login and launching virtual console (which
As the title said. I got my very old VM with still Windows 7 running, and I wanted to upgrade it in place to Windows 10. This is not supported oficially by Microsoft nowdays, but you can just download Update Assistant [https://www.microsoft.com/pl-pl/software-download/windows10] and run
unix
I had enough of checking everyday maillog on various systems so I wanted to have complete list from last day of IPs that I need to block on my firewall. I already have ACL for mail server, and I wanted to copy-paste already prepared commands on top of it, as
netbsd
I already wrote [https://pro-it.rocks/netbsd-pv-domu-lvm-disk-extend/] how to expand LVM partition on NetBSD, however expanding root partition is not as easy as none root partition. I've got schema prepared for small machines like firewalls and vpn terminators, which has only one 10GB disk, and whole filesystem is
cisco
As I wrote some time ago here [https://pro-it.rocks/pseudo-failover-internet-controlled-by-homeassistant-and-zigbee-socket-using-asa5520/] , I've got new server to host all my internal servers and services, especially, home automation, lots of monitoring tools, space for files, vpn tunnels and many more. I have choosen this server [https://www.supermicro.com/products/