Currently supported applications
The majority of applications supporting IPv6 belong to the Linux/UNIX space. As of this writing, that list includes:
Chat software
- UNIX IRC chat applicationâ€"This is the first IPv6 version of this popular IRC client.
- RAT and SDRâ€"These two utilitiesâ€"the audio tool, RAT, and session directory tool, SDRâ€"are used in conferencing for an IPv6 network.
DNS
- BIND 9.2.0â€"The new version of BIND uses A6 records to map a domain name to an IPv6 address and offers IPv6 transport of packets.
- Totdâ€"This lightweight DNS proxy nameserver supports IPv6.
- IPv6 transport for BIND 8â€"This is a patch for BIND 8.2.3 that helps resolvers talk to nameservers using IPv6.
Firewalls
- IPFilterâ€"Download this software package that supports IPv6 filtering.
- IPFWâ€"This IPv6-aware IPFW tool is included within the FreeBSD 4.0 release.
FTP
- LFTPâ€"This FTP client supports IPv6.
- NcFTP (Windows)â€"This is a robust IPv6 FTP client for Windows.
- NcFTP (BSD)â€"This is a robust IPv6 FTP client for BSD.
Games
- Quakeforgeâ€"A FreeBSD port of Quakeforge is available that's IPv6-aware.
IPsec
- IPv6 FreeS/WAN for Linuxâ€"Download this prototype IPsec implementation that was developed by IABG as part of the 6INIT project.
- IPv6 IPsec in KAMEâ€"KAME IPv6 supports IPsec with Racoon.
- Eximâ€"This mail transfer agent offers built-in IPv6 support.
- Qmailâ€"IPv6 support is available through the v1.03 patch by Kazunori Fujiwara.
- Public Sendmailâ€"Version 8.10 of this mail product officially supports IPv6.
- WIDE Sendmailâ€"Version 8.9.1 of this popular Sendmail tool supports IPv6.
- Fetchmailâ€"This mail utility supports both IPv6 and IPsec.
Mobile IPv6
- MIPL Mobile IPv6 for Linuxâ€"Developed at HUT software project in Finland, this is freely available under GPL.
Monitoring tools
- ASpath-treeâ€"Use this tool on an IPv6 site to monitor BGP4+ routing.
- COLDâ€"Download this free IPv6-aware packet sniffer.
News
- INN v2.3.2â€"Download this IPv6 patch from the Japanese NORTH site.
- IPv6 socket 1.1â€"Here's a simple and useful example of Advanced Socket API programming that's IPv6 aware.
Web servers and clients
- Apache (Linux)â€"This release of the Apache Web server for Linux has built-in IPv6 support.
- Apache (BSD)â€"The Apache Web server for BSD offers built-in IPv6 support.
- Apache 2.0.xâ€"This beta code of Apache 2.0 supports IPv6.
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important missing software -
- IPTables (the Linux firewalling system),
- Mozilla (cross-platform web browser, news, mail and chat client),
- tcpdump (packet dump for linux, bsd?),
- ethereal (network analasys tool for *nix),
and perhaps most notably omitted given the article's specific mention of it earlier, MSIE6/winxp.
I suspect there's a lot more I don't know about that quietly and transparently supports ipv6 and ipv4 due to good use of underlying socket libraries, etc.