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?????
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" then obviously as root: service vncserver restart Have you tried that? Does VNC work over IPv4? On Fri, Aug 8, 2008 at 3:55 PM, Robert Moskowitz <rgm at 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????? > >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20080809/09491487/attachment.html>
Not working.... 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.> > then obviously as root: > service vncserver restart > > Have you tried that? Does VNC work over IPv4? > > > On Fri, Aug 8, 2008 at 3:55 PM, Robert Moskowitz <rgm at htt-consult.com > <mailto:rgm at 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????? > > > ------------------------------------------------------------------------ > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >
Rob Lockhart wrote:> On Mon, Aug 11, 2008 at 12:01 PM, Robert Moskowitz > <rgm at htt-consult.com <mailto:rgm at htt-consult.com>> wrote: > > > On Fri, Aug 8, 2008 at 3:55 PM, Robert Moskowitz > <rgm at htt-consult.com <mailto:rgm at htt-consult.com> > <mailto:rgm at htt-consult.com <mailto:rgm at 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. > > > > Robert, > > I recently reinstalled VNC - actually "TightVNC" as it's better than > VNC for bandwidth. If you type "Xvnc -h" you'll see all the > parameters supported. I didn't see any options for IPv6 in my > version. But yours might indeed have more options.Using this method, I don't either, though the help is -help, not -h, but there is -multicast for IPv6 multicast for XDMCP> > I noticed that the default /etc/init.d/vncserver script seemed to be > ignoring my parameters for VNCSERVERARGS as in the log file, it showed > listening for all hosts (not just local hosts). This was confirmed by > connecting directly from another machine to the VNC server port (:1 > which is port 5901). I had an older version of the vncserver script, > and I overwrote the one from the repository with that one, and it took > my parameters. However, the parameters I can confirm are working > are: "-nolisten tcp -localhost -desktop RobHome -geometry 1280x1024". > > First, verify via "Xvnc -h" that the parmeters for IPv6 are supported > (InTransports).BTW, I note in the -help messages that parameters are case insensitive. Or that is the claim.> Next, could it be possible the ip6tables is blocking you? My > network doesn't use IPv6 so I don't think I could retrace your steps.No. Port 5902 is specifically accepted in both iptables and ip6tables. And I have tested this using another app that I have bound to that port (but is not running when I try out vncserver). And no answer on the vnc support list....
Triggered by your comments below about the log... Rob Lockhart wrote:> On Mon, Aug 11, 2008 at 12:01 PM, Robert Moskowitz > <rgm at htt-consult.com <mailto:rgm at htt-consult.com>> wrote: > > > On Fri, Aug 8, 2008 at 3:55 PM, Robert Moskowitz > <rgm at htt-consult.com <mailto:rgm at htt-consult.com> > <mailto:rgm at htt-consult.com <mailto:rgm at 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. > > > > Robert, > > I recently reinstalled VNC - actually "TightVNC" as it's better than > VNC for bandwidth. If you type "Xvnc -h" you'll see all the > parameters supported. I didn't see any options for IPv6 in my > version. But yours might indeed have more options. > > I noticed that the default /etc/init.d/vncserver script seemed to be > ignoring my parameters for VNCSERVERARGS as in the log file, it showed > listening for all hosts (not just local hosts). This was confirmed by > connecting directly from another machine to the VNC server port (:1 > which is port 5901). I had an older version of the vncserver script, > and I overwrote the one from the repository with that one, and it took > my parameters. However, the parameters I can confirm are working > are: "-nolisten tcp -localhost -desktop RobHome -geometry 1280x1024". >Dah, log file... First I stared at the vncserver script. I am not a script writer, but I figured out what VNCSERVERARGS has the [1] after it. That is for the ARGS for screen :1! So if I use 2, the I need [2], dah. So I did that and NO listening for port 5902. I went and read the log and found that intransport is NOT a valid option.... So now I either go to a different remote console that does support IPv6, or get the Personal version from RealVNC. Interestingly, vncviewer IS trying to connect over IPv6 it is sending TCPv6 SYNs out and getting resetted.