Call Book Log 3 is a log book program for radio amateurs, hosted on a web server, based on PHP 7 and MySQL/mariaDB. The database for the software is named ‘hamcallbook‘ by default but if you are going to host it on a server where you can’t choose the name of the database, like a […]
Author Archive for: stefan
About Stefan Helander
I was born a nerd! As a child I was fond of fiddling with all kind of thechnical stuff, discovering how things work and often fixing them. As a 6 year old I fixed my grandmothers 220 volts wiring.
The interest in technical stuff grown even bigger in the teenage years where I got my amateur radio license and developed a keen interest in computers.
Today I am proud to be a nerd. It is a part of my profession.
To all of you nerds and geeks out there - remember that nerd is the new sexy! :)
Entries by Stefan Helander
I’ve been troubled by the annoying disconnection of the IPsec VPN tunnel on a pfsense firewall. The tunnel disconnects after about 8 hours. The solution in my case was to enable “Disable rekey” which “Disables renegotiation when a connection is about to expire.“. The setting is found under Phase 1 advanced settings.
Check that both tables have the same engine type, so there isn’t a mix of for example MyISAM and InnoDB.
When it is not possible to delete a file using rm even when logged in as root or by using sudo, check the file attributes with: lsattr filename.ext If it has the “i” attribute, this is preventing the file from being deleted, even by super users. When you have verified the reason for this and […]
There can be several reasons for Let’s Encrypt certificates not being issued for sites. These are some things to check: When creating a new website, save it first, then open it again and check Let’s encrypt and then save it (i.e. don’t check the Let’s Encrypt unless the website has been saved at least once […]
By default, the logged in client’s IP-address and hostname are not present in the outgoing email headers which makes it hard to trace the origin in case of abuse. To make roundcube add this to the email headers of outgoing email, put this in the roundcube configuration file: // put user’s ip and host name […]
If awstats or webalizer is not containing any data and the client web logs are empty, the cause might be missing mounts of the log directories in /etc/fstab. Search /etc/fstab for the client domain name. If no log mount is found, add a line for the client web site manually in this form: /var/log/ispconfig/httpd/DOMAIN.COM /var/www/clients/clientNNN/webNNN/log […]
The asterisk log file (/var/log/asterisk/full) shows entries like this: [Sep 3 04:02:08] ERROR chan_sip.c: Serious Network Trouble; __sip_xmit returns error for pkt data Solution: The server had been moved from one public IP-address to another. In Asterisk PBX settings, the fields for both External IP and Bind Address (under Advanced) needed adjustment to the new […]
A Toshiba laptop I encountered recently was deemed “possibly dead”. It would not boot and screen was just black. A blinking green LED was present, meaning the battery is discharged. Further investigation revealed that the power supply electric cord had fallen out of the socket. Plugging it in again turned the blinking green LED to […]
Samsung multi function laser printer SL-M3375FD could suddenly not send email (scan to email) and SMB shares stopped working. Logging in to the printer web interface, using the test function for the SMTP settings just resulted in “failed” when it tried to authenticate to the email server. Recently the email server’s SSL-certificate was updated because […]