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TLS DH Group Key Length
(2020-01-20) Problem Something like SSL/TLS: Diffie-Hellman Key Exchange Insufficient DH Group St...
Use User's Password As Enable Password
(2020-12-17) Problem I want to use my username password as the enable password in ssh sessions So...
SNMP v3 on ASA
(2024-09-03) Problem SNMP on ASA please Solution snmp-server group GlobalRead v3 priv snmp-server...
SNMP v3 Read-Only setup
(2024-09-05) Example ip access-list standard snmp-access permit 10.11.12.13 snmp-server view snmp...
Ping ASA interface
(2024-09-18) Problem: Can't ping my ASA. Design: With Cisco ASA, it is impossible to ping any int...
Packet Tracer
(2025-01-13) General: packet-tracer input ifc_name [ vlan-id vlan_id ] icmp [ inline-tag tag ] { ...
SNMP configuration
(2024-12-17) set deviceconfig system snmp-setting access-setting version v3 views My-SNMP-View vi...
CLI Basics
(2024-12-17) Command Mode Show System Info > show system info hostname:... ... Show configurati...
Upgrading Remi PHP
(2024-12-05) Assuming you already have a remi php installed: # dnf module switch-to php:remi-8.3
Check Internet Service Database Match
(2024-08-28) Remember you need to have basic support in order for this db to be populated. Firewa...
Unifi Controller
Installing Unifi Controller on Docker on CentOS 8 (or probably any docker installation at this po...
TCP Tuning for iperf3
(2024-06-03) Found this set of recommendations for TCP tuning while chasing some iperf3 issues re...
TCP Tuning for 10G
(2024-11-12) This page contains a quick reference guide for Linux tuning for Data Transfer hosts ...
Find Tricks
Excluding stuff (say, the .snapshot directory of a find) $ find $dir -name .snapshot -prune -o -t...
About GPG
You may have been directed to this page by Dave's email signature, and because you noticed some k...
insecure memory
Basically this boils down to the application being unable to exclusively lock the memory page bec...
GPG Key Server Operations
The server subkeys.pgp.net is the preferred keyserver (for various reasons expounded at length el...
GPG-aware mail clients and plugins
(Note, 2024: man, the '90s were a long time ago, right?) You may find a starting point here: www...
Quick Start
GnuPrivacyGuard basics These are the bare-bones instructions to get you going. Reading the docume...
Mounting CD-ROMs
Figure out what your cdrom drive's device is. For your own peace of mind, don't use SAM, becaus...