Found some old notes concerning tagfiles. This all is for Slackware 14, but mainly should be useful for newer versions as well, though may have differences, I haven’t checked and compared. See below…
Slackware Tagfiles
October 12th, 2024opensips: getting media IP
June 9th, 2024To get the IP address from the SDP part of incoming INVITE:
$(rb{sdp.line,c}{s.select,2, })http://lists.opensips.org/pipermail/users/2024-June/048189.html
NetBSD 10: httpd with PHP support
April 24th, 2024pkgin install bozohttpd-20240126 php-8.3.4By default httpd is run under _httpd user. To start from command line and specify another user (e.g. nobody) type:
/usr/libexec/httpd -b -U nobody -C .php /usr/pkg/libexec/cgi-bin/php /var/www/To start httpd automatically, edit /etc/rc.conf (not /etc/rc.local , not /etc/defaults/rc.conf):
httpd=YES
httpd_flags="-b"
httpd_flags="-C .php /usr/pkg/libexec/cgi-bin/php"
httpd_wwwuser="nobody" # this is a separate variable,
# you may read 'man 5 rc.conf' about it
# and about other variablesUbuntu 20.04 remove old unused kernels
April 13th, 2024https://askubuntu.com/a/1253348
Check what current kernel You are running:
uname -a
Linux blackhole 5.6.13-050613-lowlatency #202005141310 SMP PREEMPT Thu May 14 13:17:41 UTC 2020 x86_64 x86_64 x86_64 GNU/LinuxSo, this system runs 5.6.13-050613-lowlatency kernel.
List all installed kernels in Your OS:
dpkg --list | egrep -i --color 'linux-image|linux-headers|linux-modules' | awk '{ print $2 }'
linux-headers-5.6.11-050611
linux-headers-5.6.11-050611-lowlatency
linux-headers-5.6.13-050613
linux-headers-5.6.13-050613-lowlatency
linux-image-unsigned-5.6.11-050611-lowlatency
linux-image-unsigned-5.6.13-050613-lowlatency
linux-modules-5.6.11-050611-lowlatency
linux-modules-5.6.13-050613-lowlatencyUninstall kernels You don’t need:
sudo apt purge linux-headers-5.6.11-050611 linux-headers-5.6.11-050611-lowlatency linux-image-unsigned-5.6.11-050611-lowlatency linux-modules-5.6.11-050611-lowlatencyflameshot
March 10th, 2024flameshot – a good alternative for Deepin Screenshot which seems to be unavailable in *buntu 23.10
OpenSIPS dispatching algorithms
February 20th, 2024Just some explanation of dispatcher module argorithms.
hash over callid – ensures that all requests within a dialog goes to same boxhash over from uri – ensures that all requests from same user goes to same boxhash over to uri – ensures that registrations of an AoR goes to same boxhash over request-uri – ensures that requests to same destination are processes by same box#hash over config variable – for different needs
NetBSD useful links
February 20th, 2024https://netbsd.org/docs/guide/en/chap-boot.html#chap-boot-keyboard-layout
https://netbsd.org/docs/guide/en/chap-boot.html#chap-boot-system-time
https://netbsd.org/docs/guide/en/chap-boot.html#chap-boot-mount-cdrom
https://netbsd.org/docs/guide/en/chap-boot.html#chap-boot-pkgsrc
https://netbsd.org/docs/misc/index.html#wifi
https://netbsd.org/docs/misc/index.html#package-management
https://netbsd.org/docs/misc/index.html#installing-rootcerts
https://netbsd.org/docs/misc/index.html#managing-services
https://netbsd.org/docs/misc/index.html#run-on-startup
https://netbsd.org/docs/misc/index.html#viewing-disks
https://netbsd.org/docs/guide/en/chap-rmmedia.html#using-usb-flash-drives
https://netbsd.org/docs/guide/en/chap-rmmedia.html#cdrom
https://netbsd.org/docs/guide/en/chap-rmmedia.html#cdrom-users
https://netbsd.org/docs/guide/en/chap-rmmedia.html#vnconfig
NPF: NetBSD Packet Filter:
https://rmind.github.io/npf/nat.html
https://github.com/rmind/npf/tree/master/docs
3nmp (like LAMP)
https://wiki.netbsd.org/tutorials/services/3nmp/
how to install a lamp server
https://wiki.netbsd.org/pkgsrc/how_to_install_a_lamp_server/
setting up blocklistd (like fail2ban)
https://wiki.netbsd.org/tutorials/setting_up_blocklistd/
the netbsd system manager’s manual
https://wiki.netbsd.org/tutorials/the_netbsd_system_manager__39__s_manual/
tuning netbsd for performance
https://wiki.netbsd.org/tutorials/tuning_netbsd_for_performance/
fail2ban, wordpress, lighttpd
February 20th, 2024/etc/fail2ban/jail.local:
# WordPress Jail
[wordpress-auths]
enabled = true
port = http,https
filter = wordpress-auth
logpath = /var/log/lighttpd/access.log/etc/fail2ban/filter.d/botsearch-common.conf:
[Init]
# Block is the actual non-found directories to block
block = \/?(<webmail>|<phpmyadmin>|<wordpress>|cgi-bin|mysqladmin)[^,]*
# These are just convient definitions
# that assist the blocking of stuff that
# isn't installed
webmail = roundcube|(ext)?mail|horde|(v-?)?webmail
phpmyadmin = (typo3/|xampp/|admin/|)(pma|(php)?[Mm]y[Aa]dmin)
wordpress = wp-(login|signup|admin)\.php
rsyslog: redirect logs from certain host to a separate file
November 30th, 2023Linksys PAP2T-NA phone adapter is configured to send logs to a remote syslog server 10.11.0.10.
Enable UDP listener in /etc/rsyslog.conf and allow in it’s config a remote ip/subnet address:
module(load="imudp") input(type="imudp" port="514") $AllowedSender TCP, 10.11.0.0/16
Here is how logs look like after this (and sure after configuring your server’s ip as a syslog server on the remote device). Most likely they will appear in /var/log/syslog :
Nov 25 15:39:19 10.11.13.102 [1: 0]RTP Tx Dn
Nov 25 15:39:19 10.11.13.102 [1: 0]ENC INIT 8
Nov 25 15:39:19 10.11.13.102 [1: 0]RTP Tx Up (pt=8->0a48000a:18076)
Nov 25 15:39:19 10.11.13.102 CC: Remote Resume
Nov 25 15:39:19 10.11.13.102 CC: Connected
Nov 25 15:39:19 10.11.13.102 RTP: SSRC changed 787a1882->1df25275
Nov 25 15:39:29 10.11.13.102 syscfg_update_hdlr!!!
Nov 25 15:39:29 10.11.13.102 syscfg_update_hdlr!!!
Nov 25 15:39:51 10.11.13.102 syscfg_update_hdlr!!!
To redirect logs from remote host with ip address 10.11.13.102 do the following:
Create /etc/rsyslog.d/11-linksys-gw.conf with the following lines:
if $fromhost-ip == '10.11.13.102' then /var/log/linksys-gw.log
& stop
Create /var/log/linksys-gw.log empty file. At least in Debian you need to chown root:adm for this file.
Finally, restart rsyslog daemon. After that all logs going from remote ip-address 10.11.13.102 will be stored in a separate file.
VirtualBox: if VM does not start from console
September 18th, 2023Trying to start VM from console, but unsuccessful:
lexus@lexus-H110M-S2H:~$ vboxmanage startvm 21eaceac-f85e-4622-a52b-c586352aa9eb Waiting for VM "21eaceac-f85e-4622-a52b-c586352aa9eb" to power on... VBoxManage: error: The virtual machine 'centos7-ast-16' has terminated unexpectedly during startup because of signal 6 VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component MachineWrap, interface IMachine
The solution is "--type headless" option:
lexus@lexus-H110M-S2H:~$ vboxmanage startvm 21eaceac-f85e-4622-a52b-c586352aa9eb --type headless Waiting for VM "21eaceac-f85e-4622-a52b-c586352aa9eb" to power on... VM "21eaceac-f85e-4622-a52b-c586352aa9eb" has been successfully started.