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Can't get vncviewer -via to work [SOLVED]
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audiodef
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PostPosted: Sun Jan 20, 2013 8:49 pm    Post subject: Can't get vncviewer -via to work [SOLVED] Reply with quote

I've been trying to use vncviewer with -via, but anything I try results in vncviewer spitting out a list of options. I've tried:

vncviewer -via (user)@(host_ip_address):(display_num) localhost
vncviewer -via (user)@(host_ip_address) localhost
vncviewer -via (host_ip_address) localhost

and various combinations. What am I missing? Unencrypted VNC (tigervnc on the remote machine) works, and I can ssh in to my remote machine.
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Last edited by audiodef on Tue Jan 22, 2013 4:08 pm; edited 1 time in total
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Gusar
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PostPosted: Sun Jan 20, 2013 9:08 pm    Post subject: Reply with quote

If you're using tigervnc-1.2.0, there is no -via. It hasn't been implemented yet in the new fltk-based viewer. I know it's still listed in the manpage, but that's just because it's outdated. Upstream bug report: http://sourceforge.net/tracker/?func=detail&atid=1126848&aid=3588877&group_id=254363 <- status: patches welcome
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audiodef
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PostPosted: Sun Jan 20, 2013 9:10 pm    Post subject: Reply with quote

Oh, OK. Thanks for the info. :)
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audiodef
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PostPosted: Sun Jan 20, 2013 9:40 pm    Post subject: Reply with quote

If I choose to downgrade, does tigervnc need to be downgraded on both client and server machines? Because I downgraded on the client machine and I'm getting connection refused errors for -via.
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Gusar
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PostPosted: Sun Jan 20, 2013 9:45 pm    Post subject: Reply with quote

As far as I know -via is all client-side, the server shouldn't matter.
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audiodef
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PostPosted: Sun Jan 20, 2013 10:24 pm    Post subject: Reply with quote

Ah, I forgot to add the display number to localhost. It works.

How would I configure tigervnc to not accept any connections that are not tunneled?
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Gusar
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PostPosted: Sun Jan 20, 2013 10:43 pm    Post subject: Reply with quote

There's an option for the server to listen only on localhost, "man Xvnc" is your friend.

Beyond that, just set the firewall to not let standard vnc ports through. The usual recommended firewall config is to block all inbound connections except specific (for example, ssh) ports, so if you use a config like that, you're already covered.
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audiodef
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PostPosted: Mon Jan 21, 2013 1:39 am    Post subject: Reply with quote

Gotcha. All I had to do was put -localhost in VNC_OPTS in /etc/init.d/tigervnc.

Thanks for your help. :)

EDIT:

It keeps disconnecting, after which all further connections are refused unless I restart tigervnc. Another known issue?

Actually, now I'm seeing tigervnc failing to stop...
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Gusar
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PostPosted: Fri Jan 25, 2013 9:46 am    Post subject: Reply with quote

Weeeeeeee, -via has been added to tigervnc svn: http://thread.gmane.org/gmane.network.vnc.tigervnc.scm/1400

On Arch, I provide a svn PKGBUILD - https://aur.archlinux.org/packages/tigervnc-svn/ - I haven't bothered creating a live ebuild for gentoo.
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audiodef
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PostPosted: Fri Jan 25, 2013 3:32 pm    Post subject: Reply with quote

Gusar wrote:
Weeeeeeee, -via has been added to tigervnc svn: http://thread.gmane.org/gmane.network.vnc.tigervnc.scm/1400



Nice!
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