Setup a Router using Linux

Procedures of setting a router with cache function are as follows:

Router section:

1. install dnsmasq

2. iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE

3. modify /etc/network/interfaces with following lines

auto eth0 static
iface eth0 inet static
address 192.168.18.1
netmask 255.255.255.0
network 192.168.18.0
broadcast 192.168.18.255

4. echo “1” > /proc/sys/net/ipv4/ip_forward or modify /etc/sysctl.conf

5. install pppoeconf for pppoe connection

Cache session：

1. install squid

2. configure squid.conf

3. iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp –dport 80 -j REDIRECT –to-ports 3128 # http proxy transparency setting

Connecting to other proxy servers for breaking great firewall:

1. configure squid.acl.gfwed.config # used to distinguish which websites need to other proxy servers.

2. configure squid_cache_peers.conf # set which other proxy servers we are connecting to.

3. configure stunnel.conf # set which other proxy servers we are connecting to.

Other proxy server side’s setting is as follows:

1. install squid

2. install stunnel4

3. configure stunnel4.conf

4. create stunnel.pem for stunnel

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