Tuesday, September 04, 2007

Setting up a simple Gateway on a Linux Machine


Quite easy
1. Set "net.ipv4.ip_forward = 1" in /etc/sysctl.conf
2. Enter command "sysctl -p" as root.
3. Enter command "iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE"
4. Enter command "/etc/init.d/iptables save" to make the settings permanent.
( only on Redhat,Fedora and alike ) Use some other means on different distros like rc.local file.

changing opnsense mtu

 note to self When an OpnSense is deployed on Proxmox environment where MTU is <1500, it doesn't seem to auto-detect and leaves the O...