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Building a dual stack host

OS. I started by installing Freebsd 4.4.Has the advantage of having the Kame stack compiled into the Kernel.I choose to use two names for the machine.One resolving to a v6 addressOne resolving to a v4 hostIn the rc.conf file I used the name rangers.unl.edu rather then the v6 name.For some reas

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Building a dual stack host

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    1. Building a dual stack host Rangers.ipv6.unl.edu Dale Finkelson

    2. OS I started by installing Freebsd 4.4. Has the advantage of having the Kame stack compiled into the Kernel. I choose to use two names for the machine. One resolving to a v6 address One resolving to a v4 host In the rc.conf file I used the name rangers.unl.edu rather then the v6 name. For some reason this worked better. It messed up the window manager Gnome. My guess is Gnome didnt know how to deal with a AAAA record Not a big deal if you use another window manager.

    3. Applications Named 4.4 came with 8.2.4 This supports AAAA Configuration DNS will be done in more detail at another time in the workshop.

    4. Applications Apache_1.3.20+ipv6 This was trivial. All I had to do was do a make in the ports directory. The config file is /usr/local/etc/apache/httpd.conf Apart from some http configuration there was nothing v6 specific to do.

    5. Applications Mozilla-0.9.3.1+ipv6 This took forever to install. The compilation is huge. It probably cannot be done in a half day of a workshop. Unless your machine is faster. It worked just fine. However you will have a hard time convincing yourself if www.kame.net is not available. You need a v6 addressed server where you know you will use the v6 address. It does not display the address of the machine it is going to. I use different names for v4 and v6 on rangers. Thus by attaching to rangers.ipv6.unl.edu I convinced myself it works.

    6. Applications Sendmail The sendmail in freebsd 4.4 is v6 capable. Its version 8.11.6. There is however configuration you need to do. In the M4 file, in my case this was /etc/mail/freebsd.mc, you need to add the following two lines. DAEMON_OPTIONS(Name=MTA-v4, Family=inet) DAEMON_OPTIONS(Name=MTA-v6, Family=inet6)

    7. Sendmail Configuration In my machine the file /etc/mail/freebsd.mc contained the lines. I uncommented them. I copied the file to /usr/share/sendmail/cf/cf. Then /usr/share/sendmail/cf/m4/cf.m4 freebsd.mc > freebsd.cf Copied freebsd.cf to sendmail.cf and restarted the sendmail process. It worked fine. Test this by telneting to port 25 on the v6 hostname

    8. Sendmail I could not make the m4 stuff work if I was in another directory then the one specified. The README file says to do a ./Build in the directory, but I could not get that to work.

    9. Applications Cucipop-1.31 Pop3 server There are several, I chose this one for no particular reason. Compiled and installed with no problem. Configuration By default pop3 is probably turned off in inetd.conf. Had to change the pop line in inetd.conf from tcp to tcp6 or create a new one so it would support both. Restart inetd

    10. Applications Sylpheed.0.6 A v6 complient mail client. Complied and installed just fine. Configuration I configured it to use rangers.ipv6.unl.edu as the sending and receiving host. Set up a user Testing This will be hard to test as someone else with a v6 capable mailer needs to mail you a message. In a workshop this could be done and mail could move back and forth there.

    11. Applications Those are the major ones that I know of that will provide the major services that at least I use most of the time. I also installed some tools.

    12. Tools Ethereal 0.9.1 Easy to compile and install. Will receive and decode v6 packets. At least to the extent that you know how to use ethereal. Good for exploring and verifying the packet flows for neighbor discovery or stateless autoconfig as well as verifying packets are using v6 addresses.

    13. Tools Netperf-2.1.3 Compiled and installed fine. I have no clue if it works.

    14. Tools Pchar-1.4 This does the path charactistics. Works with v6 addresses.

    15. Failures I had two packages that are claimed to work but that I could not make work. Mtr 0.45 This is a ping/traceroute tool. It would not resolve a v6 hostname or work with a v6 address. Ncftp 3.1.2 Same problem. It failed to resolve v6 hostnames or use v6 addresses.

    16. Conclusion Over about 3 days, I was able to build a dual stack workstation that can: Do DNS for ipv6.unl.edu Send and receive mail Host a web site Use other v6 web sites Do some network analysis and testing. There are also of course the standard tools line ping6 and traceroute6 that are simply included in 4.4. This is Unix specific. I suspect that Linux with Usagi will have very similar results.

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