Comparison of IPv6 application support

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This is a comparison of popular Internet applications in regards to their support of the IPv6 protocol.

1 IPv6 support table
2 Programs that bridge IPv4 with IPv6
3 Other references
4 See also

[edit] IPv6 support table

Application	Category	IPv6 supported?	Zone ID supported?	Earliest version # with IPv6 support	Notes	Reference links
AbsoluteTelnet SSH	SSH Client, Telnet Client, SFTP Client	Yes	No	5.01	Supports SSH, Telnet, and SFTP	[1]
Active Directory	LDAP server
Apache httpd	Web server	Yes	N/A	2.0.14	"Virtual hosts on IPv6 addresses are broken in versions until 2.0.28"	[2]
Apple Mail	e-mail client	Yes
BIND	DNS server	Yes	N/A	4.9.4, 8.4.1?
BSD Telnet	Console application	Yes	Yes	1.2?	Telnet and telnetd from OpenBSD.
CUPS	Digital printing	Yes		1.2		[3]
cURL	File transfer software	Yes
ffproxy	Proxy server	Yes		1.5	Non-caching proxy.
ftp.exe	Console application	Yes	Yes	5.1 (XP)	Standard Windows FTP client.
Hiawatha	Web server	Yes	N/A	6.0
IIS	Web server	Yes	N/A	6.0
Internet Explorer	Web browser	Yes	No	4.01	Versions before 7.0 may not be able to handle numerical addresses. Macintosh versions do not support IPv6.	[4][5][6]
Irssi	IRC client	Yes		0.7.15		[7]
Konqueror	Web browser	Yes	Yes	2.2		[8]
lighttpd	Web server	Yes	N/A
Linux CIFS VFS	SMB/CIFS client	Yes		1.49	cifs vfs version 1.48 is part of kernel 2.6.21	[9]
Linux NetKit ftp	Console application	Yes	Yes	0.17?	Standard Linux FTP client.
Linux NetKit Telnet	Console application	Yes	Yes	0.17?	Standard Linux telnet client and server.
Microsoft DNS	DNS server	Yes	N/A	5.0 (2000)	Windows 2000 DNS can handle AAAA records, but the operating system does not implement an IPv6 networking stack.	[10]
Microsoft Outlook	e-mail client	Yes		2003?
mIRC	IRC client	No
Mozilla / SeaMonkey	Web browser	Yes			IPv6 is not preferred by default on Mac OS X.	[11] [12] [13]
Mozilla Firefox	Web browser	Yes	No	1.5	IPv6 is not preferred by default on Mac OS X in Firefox 1.5 or 2.0, but this is fixed in Firefox 3.0.	[14] [15]
Mozilla Thunderbird	e-mail client	Yes			Version 2.0 & later appears to work with Mac OS X Version 10.4.9.	[16]
Nmap	Console application	Yes	No	3.10ALPHA1		[17]
Nortel Networks VPN client	VPN client	?				[18]
Novell eDirectory	LDAP server
OpenLDAP	LDAP server	Yes		2.0.0		[19]
OpenSSH	SSH client/server	Yes	Yes
OpenVPN	VPN client	Planned		2.0	Does not support "server mode" in IPv6: multiple tunnels require separate ports.	[20]
Opera	Web browser	Yes	No	7.20b	IPv6 support on Macintosh was added in Opera 9.0	[21] [22] [23] [24]
Outlook Express	e-mail client	No	N/A		Windows Mail on the Windows Vista platform has IPv6 support.	[25]
Pidgin	Instant messenger	Yes		2.0 (GAIM had support in older builds)	IPv6 is enabled on Linux builds, but not on Win32 builds.	[26]
Polipo	Proxy server	Yes	No	0.8	Can be used for proxying between IPv4 and IPv6
PuTTY	SSH client	Yes	Yes	0.58	Fully functional (also Zone ID's) from 0.59	[27]
Quagga	Routing software	Yes	N/A		OSPFv3 area support is incomplete.	[28] [29]
rsync	differential file synchronizer	Yes		2.5.0	native IPv6 support since 2.5.0, but hosts allow/deny in rsync.conf didn't work until 2.5.6.	[30] [31]
Safari	Web browser	Yes	No			[32]
Samba	SMB/CIFS client/server	Planned			Patches are available that add IPv6 support.	[33]
srelay	SOCKS server	Yes	N/A
Squid cache	Proxy server	Yes		3.0STABLE1	Development work has been intermittent from 2001-2007.	[34] [35]
telnet.exe	Console application	Yes	Yes	5.1 (XP)	Standard Windows telnet client.
TightVNC	VNC	Optional		Protocol version 3.5	Experimental IPv6 builds were made available in 2004.	[36]
tinc	VPN client	Yes		1.0	Defaults to IPv6; can be set to IPv4-only.	[37]
Trillian	Instant Messenger	?
VLC	Multimedia player	Yes
Wget	File transfer software	Yes		1.9?	May default to IPv4 transfers: use the "-6" option to override.	[38]
Winamp	Multimedia player	Yes		5.34		[39]
Windows Media Player	Multimedia player	Yes		9.0?		[40]
Windows File and print sharing	SMB/CIFS client/server	Yes		5.2 (Server 2003)	Windows XP does not support IPv6 at the SMB/CIFS layer. The protocol is available for other applications ("ipv6 install" pre-SP1; protocol install afterwards).	[41] [42] [43]
WWWOFFLE	Proxy server	Yes	No	2.6d		[44]
XChat	IRC client	Yes		1.7.0		[45]
xinetd	Networking daemon	Yes		1.89	Version 2.3.3 or newer recommended to avoid security issues.	[46]
µTorrent	BitTorrent client	Yes		1.8 version alphas only?

[edit] Programs that bridge IPv4 with IPv6

http://toxygen.net/6tunnel/ 6tunnel & NT6tunnel: IPv4-IPv6 port proxy
stone: can be used to provide IPv4 ports at the IPv6 layer. [47]
46Bouncer: IPv4-IPv6 bridging application; last updated in late 2001. [48]

In addition to the above specific tools, many client/server applications can be configured to go through a double-stack HTTP or SOCKS proxy to reach the other Internet. Those that cannot can often use an SSH tunnel.