iFrame: Apache: Header always append X-Frame-Options SAMEORIGIN nginx: add_header X-Frame-Options SAMEORIGIN; wildfly: (in resposne headers) X-Frame-Options: SAMEORIGIN Cert Errors: for pre-prod certs - get an internal Rapid SSL cert IP Source Routing: AMI Resolution: /sbin/sysctl --help | -a (to view) | -w [variable] (to modify) variable: net.ipv4.conf.all.accept_source_route = 0 net.ipv4.conf.all.forwarding = 0 net.ipv4.conf.all.mc_forwarding = 0 net.ipv4.conf.default.accept_source_route = 0 net.ipv4.conf.default.forwarding = 0 net.ipv4.conf.default.mc_forwarding = 0 GRUB: AMI ICMP Re-Routing: AMI Resolution: /sbin/sysctl --help | -a (to view) | -w [variable] (to modify) Variable(s): net.ipv4.conf.all.accept_redirects = 0 net.ipv4.conf.default.accept_redirects = 0 net.ipv4.conf.all.secure_redirects = 0 net.ipv4.conf.default.secure_redirects = 0 Java: AMI (waiting on Enterprise Agreement) Root Login, Anonymous: issues with terminal access: TTY Resolution: nano /etc/securetty should only contain: console, tty[0-9]*, and vc\[0-9]* note: ssh does no use /etc/securetty. to disable root login via ssh, use the "PermitRootLogin" setting in /etc/ssh/sshd_config and restart ssh daemon GRUB, enable password may be located here: /etc/grub.conf | /boot/grub/grub.conf | /boot/grub/menu.lst Resolution: run grub-md5-crypt (take output, and place here, inside grub.conf) passwod --md5 Linux, find orphaned files Resolution: find / -xdev \( -nouser -o -nogroup \) -print delete or modify with chown Linux, restrict home directory mode/access Resolution: chmod 750