ITTips
AES-256 is stronger than RSA-512.
AES-256 ~ RSA-15,380
SELinux
http://elibrary.fultus.com/technical/index.jsp?topic=/com.fultus.redhat.elinux5/manuals/Deployment_Guide/rhlcommon-chapter-0017.html∞
nmap
Ping scan:
nmap -sP 10.20.30.0/24
TCP wrappers
- to check if a service comes under TCP wrapper checks:
root@www2:~# ldd /usr/sbin/sshd |grep wrap
libwrap.so.0 => /lib/libwrap.so.0 (0x00002aaaaabc2000)
root@www2:~# ldd /usr/sbin/apache2 |grep wrap
This is a neat piece of software that update iptables when people are trying to do brute force attacks
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