#acl All:read
<<TableOfContents>>
= Which version of openssh support IPv6? =
[[http://www.openssh.org/|Openssh]] supports IPv6 since 2000. Use the latest version to avoid security bugs.

= How can I enable/disable IPv6 in ssh daemon? =
There is a configuration option in {{{sshd_config}}} file to define the local addresses sshd should listen on.

 ListenAddress::
             Specifies the local addresses sshd should listen on.  The following forms may be used:
 {{{
                   ListenAddress host|IPv4_addr|IPv6_addr
                   ListenAddress host|IPv4_addr:port
                   ListenAddress [host|IPv6_addr]:port
 }}}

= How can I enable/disable IPv6 in ssh client (ssh/scp/sftp)? =

There is a configration option in {{{ssh_config}}} file to define which protocol  (ipv4/ipv6) enable/disable:

 AddressFamily::
             Specifies which address family should be used by the ssh client programs.  Valid arguments are {{{any}}}, {{{inet}}} (use IPv4 only), or {{{inet6}}} (use IPv6 only).  The default is {{{any}}}.

= Is there any other way to enable/disable IPv6 without modifying configuration files? =

You can force IPv4 or IPv6 usage with commmand line switches {{{-4}}} and {{{-6}}} respectively.