Linux ifupdown 6to4 configuration

6to4tunnel.cfg

#You can get 6to4 adress with below command
#printf "2002:%02x%02x:%02x%02x::1" `curl https://ahmetozer.org/cdn-cgi/tracert -4 -s |grep ip | cut -d"=" -f 2 | tr "." " "`

auto 6to4
iface 6to4 inet6 v4tunnel
         address 2002:0808:0808::1  #Do not forget to change own ip in all config.
         netmask 48                 #
         endpoint 192.88.99.1       # Anycast Tunnel Gateway
         #gateway 2002:0808:0808::
         ttl 255
         # If you have a Native or other IPv6 acces on system You can add ip table to easliy manage
         post-up ip -6 rule add to 2002:0808:0808::1/48 table 6to4
         post-up ip -6 rule add from 2002:0808:0808::1/48 table 6to4
         post-up ip -6 ro re default dev 6to4 table ams4-6
         # If you want to use in other namespaces like a docker or vpn, you have to add route rule to table.
         post-up ip -6 ro re 2002:0808:0808:5::/64  dev  dockerInterface table 6to4