Accessing a server behind a firewall
Chowdry, Mamoon
Mamoon_Chowdry "at" adc.com
Wed, 12 Apr 2000 14:55:28 +0000
Hi Peter,
Thanks for your advice. I have just got it to work.
Unfortunately I can't use Linux on my office PC but I did find out that Outlook 2000 allows you to fire up an application if you send yourself an email with a particular word in the subject line.
Problem solved... thanks!
Mamoon.
> Date: Tue, 11 Apr 2000 23:41:47 +0100
> From: "Peter Ball" <CFL "at" marguet-ball.demon.co.uk>
> Subject: Re: Accessing a server behind a firewall
>
> On 11 Apr 2000, at 16:37, Chowdry, Mamoon wrote:
>
> > I'm writing to both help others who may want to do the what I am
> > doing and also to ask if there's a more elegant solution. I have
> > been trying to access my office PC (which is behind a firewall),
> > from a PC on the internet.
> >
> > My current solution is:
> > My office PC has a VNC server running as a service. Every
> > hour I have a scheduled task that runs "winvnc -connect
> > <HOME_IP_ADDRESS>". On my home PC I have the VNC
> > client running in listen mode.
> >
> > This is the only way I can "dial in" to the office as the firewall
> > only allows outgoing TCP connections.
> >
> <snip>
> > Is there anyway I can trigger the server PC to initiate a VNC
> > session on demand, instead of on a regular basis?
>
> It's just an idea but assuming your mail server runs 24/7 one thing
> that can get through to your PC from outside the firewall is an
> email. An email client that's programable could POP your mail
> sever just for the sender and subject looking say once a minute
> looking for an email from you with a particular subject line then run
> the command "winvnc -connect <HOME_IP_ADDRESS>".
>
> I've not done this, as I said it just an idea :-)
>
> Best Wishes
>
>
>
>
>
>
>
>
> - -----------------------------------
> Peter Ball
> Computers For Linguists
> cfl "at" marguet-ball.demon.co.uk
> Tel: +44(0)20 7732 1741
> Fax: +44(0)20 7358 9214
> 45 Endwell Road, London, SE4 2PQ, United Kingdom
>
> ------------------------------
>
> Date: Tue, 11 Apr 2000 18:08:47 -0500
> From: "Loh, Joe" <Joe.Loh "at" COMPAQ.com>
> Subject: VNCviewer for WIN32 -keyboard option
>
> Hi all,
> I am interested in knowing a little bit more about the
> -keyboard option.
> It sounds like an option that may help with a problem I am trying to
> resolve.
> My lack of understanding on the NT keyboard setting prevents
> me from being
> able to comprehend fully the documentation on -keyboard option.
>
> What I am trying to do is to get the keyboard keys like "PageUp" and
> "PageDown"
> to work in 'vim' or 'vi' when I connect using VNCviewer to a
> VNC Server
> running
> on Solaris. I am interested in a mapping solution from the
> VNCviewer side
> instead of on the Solaris because I use Exceed as well. The
> Exceed window
> manager
> maps the "PageUp" and "PageDown" correctly by defaults, and I
> am concern
> about
> "breaking" that, if I start changing the mapping on the
> Solaris side. I am
> using
> 'twm' when running with the VNC server on Solaris.
>
> Thank you so much for any help on this subject matter.
>
> Joe Loh
> Compaq Computer Corporation
> Corporate Design Automation
> P.O. Box 692000 MS080801 Houston TX 77269-2000
> Tel: 281.518.3075 Fax: 281.518.0652
> e-mail: joe.loh "at" compaq.com
>
> ------------------------------
>
> Date: Tue, 11 Apr 2000 21:15:49 EST
> From: "Roger Reghin" <rreghin "at" hotmail.com>
> Subject: Re: Accessing a server behind a firewall
>
> Peter:
>
> I'll use your idea !!!
>
> Regards,
>
> Roger.
>
> >From: "Peter Ball" <CFL "at" marguet-ball.demon.co.uk>
> >Reply-To: vnc-list "at" uk.research.att.com
> >To: vnc-list "at" uk.research.att.com
> >Subject: Re: Accessing a server behind a firewall
> >Date: Tue, 11 Apr 2000 23:41:47 +0100
> >
> >On 11 Apr 2000, at 16:37, Chowdry, Mamoon wrote:
> >
> > > I'm writing to both help others who may want to do the what I am
> > > doing and also to ask if there's a more elegant solution. I have
> > > been trying to access my office PC (which is behind a firewall),
> > > from a PC on the internet.
> > >
> > > My current solution is:
> > > My office PC has a VNC server running as a service. Every
> > > hour I have a scheduled task that runs "winvnc -connect
> > > <HOME_IP_ADDRESS>". On my home PC I have the VNC
> > > client running in listen mode.
> > >
> > > This is the only way I can "dial in" to the office as the firewall
> > > only allows outgoing TCP connections.
> > >
> ><snip>
> > > Is there anyway I can trigger the server PC to initiate a VNC
> > > session on demand, instead of on a regular basis?
> >
> >It's just an idea but assuming your mail server runs 24/7 one thing
> >that can get through to your PC from outside the firewall is an
> >email. An email client that's programable could POP your mail
> >sever just for the sender and subject looking say once a minute
> >looking for an email from you with a particular subject line then run
> >the command "winvnc -connect <HOME_IP_ADDRESS>".
> >
> >I've not done this, as I said it just an idea :-)
> >
> >Best Wishes
> >
> >
> >
> >
> >
> >
> >
> >
> >-----------------------------------
> >Peter Ball
> >Computers For Linguists
> >cfl "at" marguet-ball.demon.co.uk
> >Tel: +44(0)20 7732 1741
> >Fax: +44(0)20 7358 9214
> >45 Endwell Road, London, SE4 2PQ, United Kingdom
> >---------------------------------------------------------------------
> >To unsubscribe, send a message with the line: unsubscribe vnc-list
> >to majordomo "at" uk.research.att.com
> >See also: http://www.uk.research.att.com/vnc/intouch.html
> >---------------------------------------------------------------------
>
> ______________________________________________________
> Get Your Private, Free Email at http://www.hotmail.com
>
> ------------------------------
>
> Date: Tue, 11 Apr 2000 19:18:22 -0600
> From: Dave Warren <maillist "at" devilsplayground.net>
> Subject: RE: Authentication
>
> Or, use VNCViewer (On the administrator's machine) in
> --listen mode, and the "Server" will connect out as needed.
>
> >Im am very interested in using VNC for remote control. I
> help manage a LAN
> >that support 600 users at 5 locations. I have tested it and
> it works great
> >for what I need. The only problem that I have is that the
> VP wants the
> >station that is going to be taken over to have to give
> permission first.
> >For
> >example, he wants them to click allow or disallow before being remote
> >controlled. Or he wants it to give the user a message that
> they have been
> >taken over. I can not find anything on this. Can anyone help?
>
>
>
> ========================================================
> Dave Warren
> Email: dave.warren "at" devilsplayground.net
> Emergency Only: dave.pager "at" devilsplayground.net
> Free POP3 and WebMail at: http://www.devilsplayground.net/
> Email for everyone!
> ========================================================
>
> ------------------------------
>
> Date: Wed, 12 Apr 2000 09:58:39 +0900
> From: akira "at" sra.co.jp (Akira Hatakeyama)
> Subject: Re: Pixel translations
>
> Greetings.
>
> Subject Pixel translations
> Apr 11, 12:39pm, Ho-Kuo Chan wrote:
> ] Hi,
> ] I was looking at the code for the pixel format
> translations and there
> ] is something I can't quite figure out (I'm hoping Wez or
> Jonathan can
> ] help me with this). Let's say the server is at 24 bpp in
> BGR888 and the
> ] client wants 8 bpp in BGR233. If we use three separate tables in the
> ] server, then the server will translate 8 bit blue to 2 bit
> blue, 8 bit
> ] green to 3 bit green and 8 bit red to 3 bit red. I would
> think that this
> ] would work out to an even distribution, eg: for blue, 8 bit
> input values
> ] from 0 to 63 would translate to 0 in 2 bits, 64 to 127 ->
> 1, 128 to 191
> ] ->2 and 192 to 255 -> 3. However, after analysing the code,
> I see that
> ] in fact, the distribution is actually: 0 to 42 -> 0, 43 to
> 127 -> 1, 128
> ] to 212 -> 2 and 213 to 255 -> 3. The results are similar to other
> ] translations (eg: 8 bit primary colour input to 3 bit
> primary output, 8
> ] bit to 5 bit, etc). I would think that an equally distributed
> ] translation would result in a more true image. Can anyone explain?
>
> How about <http://www.inforamp.net/~poynton/Poynton-color.html>?
> Gamma FAQ and Color FAQ will help you.
>
> - --
> Akira Hatakeyama E-Mail: akira "at" sra.co.jp
> http://www.sra.co.jp/people/akira/index.html
> chigasaki-minami, tsuzuki ward, yokohama, japan
>
> ------------------------------
>
> Date: Wed, 12 Apr 2000 10:40:52 +0930
> From: "Ian Simcock" <simcock "at" hyper.net.au>
> Subject: Re: Authenication
>
> Hi Mike.
>
> You could always go the simple way of not installing VNC as a
> service, just
> as an application, and ring up the user and get them to run
> it when you want
> to take over. That way you can't take over the users machine
> without direct
> permission, and all they have to do is run the server, they
> don't need to
> change the password or anything.
>
> Ian Simcock.
>
>
> - ----- Original Message -----
> From: Mike White <MikeW "at" action-lane.com>
> To: <vnc-list "at" uk.research.att.com>
> Sent: Wednesday, April 12, 2000 4:55 AM
> Subject: Authenication
>
>
> > Im am very interested in using VNC for remote control. I
> help manage a
> LAN
> > that support 600 users at 5 locations. I have tested it
> and it works
> great
> > for what I need. The only problem that I have is that the
> VP wants the
> > station that is going to be taken over to have to give
> permission first.
> For
> > example, he wants them to click allow or disallow before
> being remote
> > controlled. Or he wants it to give the user a message that
> they have been
> > taken over. I can not find anything on this. Can anyone help?
> >
> > Thanks
> >
> ---------------------------------------------------------------------
> > To unsubscribe, send a message with the line: unsubscribe vnc-list
> > to majordomo "at" uk.research.att.com
> > See also: http://www.uk.research.att.com/vnc/intouch.html
> >
> ---------------------------------------------------------------------
>
> ------------------------------
>
> Date: Tue, 11 Apr 2000 17:25:12 -0700
> From: "Nieltawee, Lake" <Lake.Nieltawee "at" schwab.com>
> Subject: WinVNC on port 80
>
> Have anyone ever run WinVNC app. server on port 80. There is
> a very small
> section in the document saying that it possible, but didn't
> explain how to
> do it clearly.
>
> I have an NT/PC running WinVNC application at home and want
> to connect to it
> from work with web browser. My PC at work is behind the
> firewall and proxy,
> which only allow communication port 80 and 443 (SSL). How do
> I configure my
> WinVNC at home NT/PC to communicate via port 80.
>
> Any helps would greatly appreciate,
>
> Lake N.
>
> ------------------------------
>
> Date: Tue, 11 Apr 2000 17:35:40 -0700
> From: "Nieltawee, Lake" <Lake.Nieltawee "at" schwab.com>
> Subject: WinVNC Applet Viewer for multiple users
>
> Does anyone every try to connect 2 or multiple WinVNC Applet
> viewers to a
> single host?
>
> I am thinking of an online web training for 2 or 3 users at a time.
>
> Thank you,
>
> Lake N.
>
> ------------------------------
>
> Date: Tue, 11 Apr 2000 23:02:34 -0400
> From: "Erdely, Michael" <mike "at" erdelynet.com>
> Subject: RE: WinVNC Applet Viewer for multiple users
>
> It's covered in the FAQ.
>
> - -ME
>
> - -----Original Message-----
> From: owner-vnc-list "at" uk.research.att.com
> [mailto:owner-vnc-list "at" uk.research.att.com]On Behalf Of
> Nieltawee, Lake
> Sent: Tuesday, April 11, 2000 8:36 PM
> To: 'vnc-list "at" uk.research.att.com'
> Subject: WinVNC Applet Viewer for multiple users
>
>
> Does anyone every try to connect 2 or multiple WinVNC Applet
> viewers to a
> single host?
>
> I am thinking of an online web training for 2 or 3 users at a time.
>
> Thank you,
>
> Lake N.
>
>
> -
> ---------------------------------------------------------------------
> To unsubscribe, send a message with the line: unsubscribe vnc-list
> to majordomo "at" uk.research.att.com
> See also: http://www.uk.research.att.com/vnc/intouch.html
> -
> ---------------------------------------------------------------------
>
> ------------------------------
>
> Date: Wed, 12 Apr 2000 04:06:25 +0100
> From: Jonathan Morton <chromi "at" cyberspace.org>
> Subject: Re: WinVNC on port 80
>
> >Have anyone ever run WinVNC app. server on port 80. There is
> a very small
> >section in the document saying that it possible, but didn't
> explain how to
> >do it clearly.
> >
> >I have an NT/PC running WinVNC application at home and want
> to connect to it
> >from work with web browser. My PC at work is behind the
> firewall and proxy,
> >which only allow communication port 80 and 443 (SSL). How
> do I configure my
> >WinVNC at home NT/PC to communicate via port 80.
>
> Set it to use display number -5720.
>
> >Does anyone every try to connect 2 or multiple WinVNC Applet
> viewers to a
> >single host?
>
> Yes, simply set the viewers to connect in "shared" mode, or use the
> Registry to configure the server so that it always connects viewers in
> "shared" mode.
>
> - --------------------------------------------------------------
> from: Jonathan "Chromatix" Morton
> mail: chromi "at" cyberspace.org (not for attachments)
> uni-mail: j.d.morton "at" lancaster.ac.uk
>
> The key to knowledge is not to rely on people to teach you it.
> - --------------------------------------------------------------
> Contributing to the VNC Project - http://www.uk.research.att.com/vnc/
> Macintosh VNCserver v3.3.2 beta2.3 now posted at:
> http://chromatix.autistics.org/vnc/
>
> ------------------------------
>
> End of vnc-list-digest V1 #691
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