(DIR) Josip Tišljar Mataušić (9A3SFZ)
       Published on: 2026-04-27
       
       In the last post I proposed a method for IPv6 on HAMNET that doesn't
       require any changes to devices outside your control, has no
       additional administrative overhead, and utilizes publicly routable
       IPv6 addresses implicitly assigned to ham radio. I am talking about
       6to4 prefixes 2002:2c00::/25 and 2002:2c80::/26 corresponding to
       44.0.0.0/9 and 44.128.0.0/10.
       
       Before you start talking about how horrible 6to4 is, go read the
       previous post[1] to better understand why this is a perfect
       technology for the initial implementation of IPv6 on HAMNET but also
       why it won't cover broader amateur radio needs and we still have to
       get a real GUA space.
       
 (DIR) 1: /hamnet-6to4/
       
       
       
       IPv6 test, now available on HAMNET
       
       If you read through the mentioned post or maybe even followed the
       guide, you might want to verify that everything you did went okay. In
       that case, I proudly present to you the first every IPv6 testing
       website available on HAMNET (I think).
       
       After just one and a half sleepless nights, I've set up a
       test-ipv6.com mirror[2] available to all HAMNET users. It does
       everything:
       
 (HTM) 2: http://test-ipv6.radioz.org
       - Checks your v4/v6 address
       - Verifys that your recursive DNS resolver can connect to IPv6-only
       - name servers
       - Tests path MTU discovery
       
       ...all from the comfort of your web browser.
       
       In the process I made some minor modifications to the original
       project. The most notable one is disabling 6to4 warnings, because, as
       we've already discussed, 6to4 works beautifully on HAMNET. I also
       slightly modified two Makefiles to allow one make to build the entire
       project. You can view the whole diff here[3].
       
 (TXT) 3: /hamnet-test-ipv6-disable6to4warnings.diff
       
       
       
       Related
       
 (DIR) 2026-03-29 IPv6 on HAMNET with 6to4
       
       
       
       Latest
       
 (DIR) 2026-05-30 RadioZ now on Gopher
 (DIR) 2026-05-06 Easy IPv4 to IPv6 proxy
 (DIR) 2026-03-29 IPv6 on HAMNET with 6to4
 (DIR) 2026-03-22 AMPRNet IPIP with systemd-networkd
       
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