ESXi Check TPM – tpm check esx cli
esxcli hardware trustedboot get esxcli hardware trustedboot get Drtm Enabled: false Tpm Present: false
Block IPs by country – Apache
Step 1 If you are using debian or ubuntu, install the mod-geoip package. sudo apt-get install libapache2-mod-geoip Step 2 Enable GeoIPEnable, edit geoip.conf /etc/apache2/mods-enabled/geoip.conf GeoIPEnable On Step 3 Find Country Code Lookup: https://en.wikipedia.org/wiki/ISO_3166-1 In Apache vhosts file, outside of the </Directory> tags: <Location /> ##ISO 3166 Country Codes ## Block China ## Block Costa […]
Linux – if anyone logs in notify SSH
Put the following in /etc/profile: The script /etc/profile is executed at every login (for bash shell users). if [ -n "$SSH_CLIENT" ]; then TEXT="$(date): ssh login to ${USER}@$(hostname -f)" TEXT="$TEXT from $(echo $SSH_CLIENT|awk '{print $1}')" echo $TEXT|mail -s "ssh login" you@your.domain aFrom:youradd@email.com fi If you have issues delivering mail to a GMAIL inbox, […]
SSH Key Conversion to an OpenSSH compatible format
puttygen supports exporting your private key to an OpenSSH compatible format. You can then use OpenSSH tools to recreate the public key. Open PuttyGen Click Load Load your private key Go to Conversions->Export OpenSSH and export your private key Copy your private key to ~/.ssh/id_dsa (or id_rsa). Create the RFC 4716 version of the public […]
Fix Open Postfix Relay – Unauthenticated Email
If your mail server is left open, anyone can use your SMTP service to send mail, and spammers will use it. This can result in your server being blacklisted and extraneous use of system resources that neither benefit you nor your users. Postfix logoTo secure Postfix, there are a number of functions you can add […]
UNIX – Fork Explained
Mr. Peabody Explains fork() Introduction How Windows Does It How Unix Does It So Why Do People Want the Unix Way? How does it work in Perl? Introduction UNIX – Fork Explained Say, Mr Peabody. I was just reading through the Perl 5.6 release notes and noticed that a new function called fork() is now […]