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CAA
(2018-10-16) Problem What is CAA record Solution CAA record is a DNS record that indicates who is...
Counting Denied Queriers
(2016-05-09) Problem Show IPs getting denied responses to queries on my local DNS server, sorted ...
Delegation Of in-addr.arpa Subdomains
(12 October 2012) Problem: I need to delegate part of my /24 to another name server. Solution Thi...
Dump A DNS Zone
Problem You want to know what the current content of a DNS zone is. Possible Solution This will w...
SOA values
(2019-09-11) I've only been doing this for 25 years, I guess it's high time I learned what it all...
dnstop
dnstop is a tool for monitoring dns requests on a particular network. It is a libcap snooper, so ...
Trace DNS Lookups
Interesting: [dave@store01 ~]$ dig +trace xdroop.com ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_...
Power Save
This also applies to situations with eXceed 8 where the screen saver engages, but never goes into...
cron
(2020-02-25) Problem The module command doesn't work in cron jobs. Solution You have to source th...
Running Fetchmail
Simple, in crontab: # /opt/sfw/bin/fetchmail -f /etc/fetchmailrc --syslog Interactively: # /opt/...
Squashing multiple commits into one
(2017-09-14) Squashing multiple commits into one: git log shows you the history: [dave@store02 an...
Grow Linux Filesystem
Problem I need to make a disk bigger Solution Resize the disk: $ gcloud compute disks list | grep...
What is my Google OpenID Login URL?
Google expects you to use the "Directed Identity" feature to sign in with your Google account. En...
gcc on Solaris 8
These are some potentially useful things to know when fighting with gcc on Solaris (Solaris 8 in ...
KVM, briefly
(2020-03-13) KVM Briefly # virsh list # virsh list --all # virsh start <name> # virsh dominfo <na...
sudo without password
(2017-05-30) Problem I don't want to get prompted for sudo access. Solution Run visudo At the...
Port Forward
Problem Port-forward firewall outside, port 5000 to inside IP 192.168.1.100, port 8080. Solution ...
Changing A Remote Gateway IP
(2013-12-05) Problem You have an ASA running 8.2(something). You have a l2l VPN with a remote pee...
Site to Site VPN
(2013-11-12) Problem Site to site VPN with an ASA running 8.2. Solution The local network is 192....
Site to Site VPN with NAT
Problem Setting up a site-to-site VPN using your shiny ASA running 8.2. Your peer has a bunch of ...