A chronological documentation test project, nothing serious, really!
What is Port Knocking? Port knocking is a method by which you can dynamically open ports on your server to a single IP address. Port knocking allows you to transparently run a service on your server without exposing the services of that port to all IP addresses. In practice, it is very similar to having […]
By default, MySQL (on Debian) doesn’t listen on the public interface: #netstat -l tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 1768/mysqld In /etc/mysql/my.cnf, comment out the bind line: #bind-address = 127.0.0.1 And restart MySQL. Then it will listen on the public interface, and you should be able to connect. #netstat -l tcp 0 0 0.0.0.0:3306 0.0.0.0:* […]
If you get an error about client authentication version when connecting to MySQL then it may be because your server is using the new password format, while your mysql client (or PHP script, or JDBC code) is using the old password format. See: http://dev.mysql.com/doc/mysql/en/Application_password_use.html. You can change a new password to an old password like […]
Every need to change (or set) passwords for a large number of users? Something like this code snippet may help. # find all the usernames with bash logins usernames=$(cat /etc/passwd | grep bash | sed ‘s/:.*//g) for i in $usernames; do echo “somepassword” | passwd –stdin $i done
#!/bin/bash # nslookup-scan of IP-range # It’s possible to add more networks separated with space NETS=”192.168.0″ IPRange=”1 254″ for NET in $NETS; do for n in $(seq $IPRange); do ADDR=${NET}.${n} echo “${ADDR},`nslookup ${ADDR} | awk -F “=” ‘{ print $2 }’|sed ‘s/^[ t]*//’ | sed ‘/^$/d’ | |sed ‘s/.$//’`” done done Result 192.168.0.1,cba.infra.no 192.168.0.2,bca.infra.no 192.168.0.3,abc.infra.no […]