
1. Take a picture of yourself right now.
2. Don’t change your clothes, don’t fix your hair…just take a picture.
3. Post that picture with NO editing.
4. Post these instructions with your picture.
In a couple of days China will launch its third manned space mission. The Shenzhou 7 spacecraft will carry three astronauts, one of them will make China's first spacewalk.
10. Routers
10.1. terminology
10.1.1. router or firewall
10.1.2. packet forwarding
10.1.3. packet filtering
10.1.4. NAT (network address translation)
10.1.5. PAT (port address translation)
10.1.6. SNAT (source network address translation)
10.1.7. masquerading
10.1.8. port forwarding
10.2. packet forwarding
10.2.1. about packet forwarding
10.2.2. /proc/sys/net/ipv4/ip_forward
10.2.3. /etc/sysctl.conf
10.2.4. Practice: packet forwarding
10.2.5. Solution: packet forwarding
11. Iptables
11.1. about iptables
11.2. packet filtering
11.2.1. about packet filtering
11.2.2. filter table
11.2.3. Changing default policy rules
11.2.4. Allowing ssh over eth0
11.2.5. Allowing access from a subnet
11.2.6. iptables save
11.2.7. scripting example
11.2.8. Allowing ICMP(ping)
11.2.9. Practice: packet filtering
11.3. network address translation
11.3.1. about NAT
11.3.2. SNAT (Source NAT)
11.3.3. SNAT example setup
11.3.4. IP masquerading
11.3.5. DNAT (Destination NAT)