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diff --git a/ipv6-6to4.howto b/ipv6-6to4.howto deleted file mode 100644 index 131f4ce4..00000000 --- a/ipv6-6to4.howto +++ /dev/null @@ -1,173 +0,0 @@ -v1.5 1st Sep 2003, Pekka Savola <pekkas@netcore.fi> - -HOW TO SET UP IPV6 WITH 6TO4 ----------------------------- - -6TO4 IN SHORT -------------- - -6to4 is a method of creating automatic IPv6 tunnels. You can connect to -IPv6 Internet very easily without a need for a manually configured tunnel. - -For every globally unique IPv4 address, there exists a mapping for a -subnettable /48 network (2^16 for subnetting, 2^64 bits for hosts). - -Return route can sometimes be non-optimal, leading to higher round-trip times. - -See below for references and more information. - -ASSUMPTIONS ------------ - -1. You're running Red Hat Linux 7.1 or later. - - This is required for correct IPv6 by default settings, and IPv6 being - enabled as a kernel module by default. - -2. Your initscripts >= 6.02, for 6to4 support. - -3. You have a static, globally unique IPv4 address. This is not an absolute - requirement, but the only scenario discussed here. - -4. Protocol 41 (IPv6-in-IPv4) is not being filtered in any IPv4 firewall. - -5. 'iproute' package is installed. This is used by default for a lot - more powerful tunneling capabilities. - -Note: even though 6to4 was supported with earlier releases of Red Hat Linux, -below it is assumed that the initscripts package version this -document comes with is used. - -INFORMATION NEEDED ------------------- - -Nothing :-). - -If you want to select a specific relay (rather than automatically -selecting the closest one), you can define it with IPV6TO4_RELAY -using the list below: - -http://www.kfu.com/~nsayer/6to4/ - -SETTING UP THE 6TO4 CONFIGURATION ---------------------------------- - -Now, set up the configuration as follows: - -1. Enable IPv6 and set 6to4 pseudo-interface as default gateway in - /etc/sysconfig/network: - - echo "IPV6_DEFAULTDEV=tun6to4">> /etc/sysconfig/network - -2. Edit your outbound (Internet) interface configuration. This can be - e.g. ippp0, ppp0, eth0, or the like. Here, eth1 is used. - - -/etc/sysconfig/network-scripts/ifcfg-eth0: ---- -DEVICE=eth0 -BOOTPROTO=none -ONBOOT=yes -IPADDR=xx.yy.zz.ww [Globally unique IPv4 address] -NETMASK=aa.bb.cc.dd [IPv4 settings up to this point] - -IPV6INIT=yes -IPV6TO4INIT=yes ---- - - Note: [i]ppp - interfaces need to be called in /etc/ppp/ip-up|down.local; - if you are not using local files by yourself, this can easily be done with: - - cd /etc/ppp - ln -s ip-up.ipv6to4 ip-up.local - ln -s ip-down.ipv6to4 ip-down.local - - -USING 6TO4 ----------- - -6to4 automatic tunneling is brought up when the interface is brought up. - -You will see your 6to4 address prefix in device tun6to4 when done: - - inet6 addr: 2002:c15e:a001::1/16 Scope:Global - -Note that 'c15e:a001' is the hexadecimal representation of dotted-quad IPv4 -address (IPADDR= above), here '193.94.160.1'. - -NOTE: iproute tools give more reliable data, try e.g. '/sbin/ip addr ls'. - -PROVIDING IPV6 TO YOUR LAN --------------------------- - -If you want to provide IPv6 for your LAN (e.g. connected on eth1) -using your Linux system as a router, this can be done rather easily with 6to4. - -You will need to enable IPv6 forwarding (IPV6FORWARDING=yes in -/etc/sysconfig/network) and install a router advertisement daemon. One such, -'radvd' is available in the distribution. - -You must configure the prefix your IPv4 maps to (see tun6to4 above) in -/etc/radvd.conf or use certain automatic hooks. This is not covered here -in detail; see radvd.conf(5) and /etc/sysconfig/network-scripts/ifup-ipv6 -for details. - -Usually the following is enough: - -1. Make sure that radvd package is installed. - -2. Configure radvd as outlined in radvd.conf(5); the file could - be something like: - - interface eth1 - { - AdvSendAdvert on; - MinRtrAdvInterval 3; - MaxRtrAdvInterval 10; - prefix 0:0:0:1::/64 - { - Base6to4Interface eth0; - AdvPreferredLifetime 120; - AdvValidLifetime 300; - }; - }; - -3. Make sure radvd starts at boot and start it now: - - /sbin/chkconfig radvd on - /sbin/service radvd start - -4. Make the initscripts signal radvd to recalculate the prefix when it - changes: - - /etc/sysconfig/network-scripts/ifcfg-eth0: - - IPV6_CONTROL_RADVD=yes - -5. Configure the associated routes to other 6to4 subnets to point at - your LAN interfaces; this can be done automatically with - IPV6TO4_ROUTING variable; please refer sysconfig.txt for details. - In the particular example, above, this would be like: - - /etc/sysconfig/network-scripts/ifcfg-eth0: - - IPV6TO4_ROUTING="eth1-:1::0/64" - - However, please note that no global address is configured on the - interface, just a route! - -MORE INFORMATION ----------------- - -http://www.bieringer.de/linux/IPv6/IPv6-HOWTO/IPv6-HOWTO.html is a good -source of IPv6 related Linux-information. - -ftp://ftp.isi.edu/in-notes/rfc3056.txt ("Connection of IPv6 Domains via IPv4 -Clouds") is the RFC about 6to4. - -ftp://ftp.isi.edu/in-notes/rfc3068.txt ("An Anycast Prefix for 6to4 Relay -Routers") is the RFC about finding a close 6to4 relay automatically. - -http://www.ietf.org/internet-drafts/draft-savola-v6ops-6to4-security-02.txt -("Security Considerations and Enhancements for 6to4") explains some -security considerations in 6to4. |