On Fri, Aug 8, 2008 at 3:55 PM, Robert Moskowitz <rgm@htt-consult.com <mailto:rgm@htt-consult.com>> wrote:

   http://www.realvnc.com/products/enterprise/4.1/ipv6.html


     IPv6 support in VNC Server E4.1.7/P4.1.2

   VNC Server E4.1.7 & P4.1.2 are fully IPv6-aware, but is shipped
   with IPv6 support disabled by default, for security reasons. IPv6
   can be enabled by setting "InTransports=IPv6,IPv4" (the default
   being IPv4 only), either on the command-line when starting
   vncserver under Unix

   Ok.  we have vnc-server-4.1.2-9.el5.i386.rpm, so it SHOULD support
   IPv6.

   Don't know how to add a setting to the command-line, as I rund
   VNCserver via the service command, but I added it to
   /etc/sysconfig/vncservers:

   InTransports="IPv6"   (note I also tried without the quotes)

   and netstat -na|grep 5902

   shows vncserver only running on IPv4 and I can only connect to it
   via IPv4.

   So what am I missing?????

Rob Lockhart wrote:

In /etc/sysconfig/vncservers I have something like this:

VNCSERVERS="1:myusername"
VNCSERVERARGS[1]="-geometry 1400x1050 -depth 16 -localhost"

(so I can only use localhost, which means I only allow connections over ssh or from the local machine).

Yours might be something like this:

VNCSERVERS="1:robert"
VNCSERVERARGS[1]="-geometry 1400x1050 -depth 16 InTransports=IPv6,IPv4"

Well first my line has [2].  I changed that to [1] and tried all sorts of variants to the above, including putting a - infront of InTransports (like other options), and replacing the = with a space.  No listening on IPv6.

I have foudn the RealVNC support mailing list and sent a question there, hopefully to get answers.  But if anyone has anything to suggest here, please do.