Quick Network Scan nmap -sn 192.168.0.0/24 OS detection with verbosity (-O -v) nmap -O -v 192.168.0.0/24 OS detection with verbosity and version scan (-sV -O -v) nmap -sV -O -v 192.168.0.0/24 Rogue DHCP server discovery nmap –script broadcast-dhcp-discover -e bond0 … Continue reading →
Delivery Status Notifications (DSN) are messages generated by a mail server to notify the sender that the email has been delivered to the destination mail server. Problem is, many systems sending email messages are doing DSN requests, but are automated … Continue reading →
Tested with Fedora 38 From a bash prompt: su – cp DesiredImage.png /usr/share/backgrounds/f38/f38-01-day.png cp DesiredImage.png /usr/share/backgrounds/f38/f38-01-night.png That is it!
Continue reading →Someone did not log out of their session while editing the configuration on the switch Entering configuration mode Users currently editing the configuration: root terminal d0 (pid 3112) on since 2023-04-05 02:18:53 CDT, idle 6w0d 05:47 {master:0}[edit] To clear the … Continue reading →
Lets say I have the following security policies set security policies from-zone CAMERAS to-zone INTERNET policy CAMERAS-to-INTERNET match source-address any set security policies from-zone CAMERAS to-zone INTERNET policy CAMERAS-to-INTERNET match destination-address any set security policies from-zone CAMERAS to-zone INTERNET policy … Continue reading →
Purpose 1. I wanted to connect a Rocky Linux 9 and True Nas 12 to (2) juniper EX2300 switches such that either switch could be turned off and/or cables could be disconnected and the servers and the storage would be … Continue reading →
You ssh to some remote system (usually across the internet) step away from your keyboard for a few minutes, and the session gets dropped. The problem may be resolved by sending more keep alive packets You can fix this by … Continue reading →
IPv6 – 128 bits = 340 undecillion addresses IPv4 32 bit = 4 billion addresses
Continue reading →Allow systems with selected ip addresses to relay email through Zimbra without needing authentication There are two ways to set and check this Global – applied to all servers set zmprov mcf zimbraMtaMyNetworks “10.1.1.0/24 [fe80::5054::]/64 127.0.0.0/8 [::1]/128” check zmprov gcf … Continue reading →
If you are dork like me and like to see what is going on when your linux system boots (rather than a swirling circle) Excute sed s/rhgb//g -i.backup /etc/default/grub grub2-mkconfig -o /boot/grub2/grub.cfg and reboot Tested on Rocky 8
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