[IWE] UPDATE

Jay Burns IV iwe@warhead.org.uk
Thu, 08 Feb 2007 21:24:23 -0600


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BeeP-

Thanks for the info, in practically idiot-proof terms (since I am a 
practical idiot, I need such  hand-holding).  I'll give ti a try, and 
let you know how it comes out.

Let me make sure I have one thing straight:  By "broadcasting on 5801", 
my work machine will basically try to scan anybody it can get to who 
responds to 58xx (where xx is the target vnc "port").  So by using the 
magic incantation via SSH, I've made port 5801 tunnel to 5802 on my home 
machine.  Have I got that right?

Still need to find the <yourservernameorIPgoeshere> thingie.  I assume 
that that is the IP address that the Surfboard has on the cable; it is 
the public address for my internet connection.  All I have to do is 
figure out how to get it to ante that up...and figure out a way to keep 
its leas for like...forever.... ;-)

Really, thanks for the help...I might actually be able to figure this 
out.  if it works, it may also allow me to VNC to my Mom's machine in FL 
(behind an Earthlink DSL modem...).

jb4


Bill Patient wrote:
>
> You could also use Putty to establish the ssh connection.
>
>  
>
> Then you would simply select "Tunnels" on the left nav menu and put in 
> source port 5802 and destination port 5801 (or maybe I have that 
> backwards...but try it one way and if it doesn't work...flip the 
> numbers around J
>
>  
>
> ------------------------------------------------------------------------
>
> *From:* iwe-admin@warhead.org.uk [mailto:iwe-admin@warhead.org.uk] *On 
> Behalf Of *Bill Patient
> *Sent:* Monday, February 05, 2007 10:42 PM
> *To:* iwe@warhead.org.uk
> *Subject:* RE: [IWE] UPDATE
>
>  
>
> Ok. Here goes.
>
>  
>
> VNC "listens" on a specific set of ports on your home machine.
>
>  
>
> When you call "vncserver" it starts the vnc session and broadcasts on 
> port 5801.
>
>  
>
> SSHd, when set up, expects a connection on port 22.
>
>  
>
> So, you must allow port 22 traffic through to the internal ip address 
> of the machine you are connecting to (your home machine). Most likely, 
> if it is the only machine on the router, the address will be 
> 192.168.0.2...but you can check this with the standard tools. You 
> establish the firewall rule using the configuration screens of your 
> router.
>
>  
>
> Now. Nearly all companies will allow traffic through port 22...not so 
> for most other ports...so you should be able to ssh to your home 
> machine from inside the firewall.
>
>  
>
> Once you ssh in, you can direct a forward of port 5801 across the ssh 
> connection.
>
>  
>
> When using ssh (the windows version)..the cmd was ssh2 --L 
> 5802:localhost:5801 <yourservernameorIPgoeshere> .
>
>  
>
> You then start vncviewer on your machine at work and ask it to connect 
> to localhost:2 since you forwarded 5801 from your home machine to 5802 
> on your work machine via the ssh tunnel (the --L switch).
>
>  
>
>  
>
>  
>
> ------------------------------------------------------------------------
>
> *From:* iwe-admin@warhead.org.uk [mailto:iwe-admin@warhead.org.uk] *On 
> Behalf Of *Jay Burns IV
> *Sent:* Monday, February 05, 2007 10:21 PM
> *To:* iwe@warhead.org.uk
> *Subject:* Re: [IWE] UPDATE
>
>  
>
> Andrew-
>
> You're getting to the hairy edge of my knowledge on  this, so expect 
> me to misspeak sooner or later.
>
> The cable modem is a Motorola Surfboard, in the 5000 series.   So it 
> is not a router per se (at least, it doesn't appear to be).  The 
> router is directly wired to the Surfboard; it is a D-Link DI-624 
> wireless router., It does present a private LAN on the back side; it 
> is set up to be a DHCP server, and gives my computer an IP address of 
> 168.192.0./x/, where x is generally 100 or 101. Its DHCP server 
> address is 168.192.0.1.  That address is also set up as my default 
> gateway.
>
> When you say "program a port forward to your computer's IP and address 
> the router's WAN address from the outside", exactly what do you mean?
>
> jb4
>
>
> Andrew Grygus wrote:
>
> On Thu, 01 Feb 2007 20:28:20 -0600, Jay Burns IV wrote:
>  
>   
>> Know about VNC, heard about SSH.
>>  
>> Next idiot question goes something like, "VNC or SSH to /where/?"  Home 
>> machine is generally off, and even if it were on, I currently haven't 
>> the slightest idea 1) what my cable modem's IP address is, and 2) How to 
>> get access to it on the other side of the router.
>>  
>> (I'm educable, though, so any ideas on how to do that?  The 
>> "documentation" that accompanies the router is just the other side of 
>> useless, and Comcast is generally inaccessible...)
>>     
>  
> Generally a cable modem acts as a bridge and just passes traffic 
> through without an address change so if your computer is attached 
> directly to the cable modem the numbers you get by typing 
> ipconfig /all (Windows) are the real numbers accessable from 
> outside.
>  
> If you have your own router between the cable modem and your 
> computer you can get the real addresses by loging into it and 
> checking the WAN status. If you have an internal router that 
> gives your local network a private address range (like 192.168.1.n) 
> you'll need to program a port forward to your computer's IP 
> and address the router's WAN address from the outside.
>  
> If your cable modem is actually a router, giving you private addresses 
> on the LAN, then you need information from the service provider.
>  
> Andrew Grygus
>  
>  
> _______________________________________________
> IWE mailing list
> IWE@warhead.org.uk <mailto:IWE@warhead.org.uk>
> http://lists.warhead.org.uk/mailman/listinfo/iwe
>  
>   

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<font face="Comic Sans MS">BeeP-<br>
<br>
Thanks for the info, in practically idiot-proof terms (since I am a
practical idiot, I need such&nbsp; hand-holding).&nbsp; I'll give ti a try, and
let you know how it comes out.<br>
<br>
Let me make sure I have one thing straight:&nbsp; By "broadcasting on 5801",
my work machine will basically try to scan anybody it can get to who
responds to 58xx (where xx is the target vnc "port").&nbsp; So by using the
magic incantation via SSH, I've made port 5801 tunnel to 5802 on my
home machine.&nbsp; Have I got that right?<br>
<br>
Still need to find the &lt;yourservernameorIPgoeshere&gt; thingie.&nbsp; I
assume that that is the IP address that the Surfboard has on the cable;
it is the public address for my internet connection.&nbsp; All I have to do
is figure out how to get it to ante that up...and figure out a way to
keep its leas for like...forever.... ;-)<br>
<br>
Really, thanks for the help...I might actually be able to figure this
out.&nbsp; if it works, it may also allow me to VNC to my Mom's machine in
FL (behind an Earthlink DSL modem...).<br>
<br>
jb4<br>
<br>
</font><br>
Bill Patient wrote:
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  <div class="Section1">
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">You could
also use Putty to establish the
ssh connection.<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">Then you
would simply select &#8220;Tunnels&#8221;
on the left nav menu and put in source port 5802 and destination port
5801 (or
maybe I have that backwards&#8230;but try it one way and if it doesn&#8217;t
work&#8230;flip the numbers around </span></font><font color="navy"
 face="Wingdings" size="2"><span
 style="font-size: 10pt; font-family: Wingdings; color: navy;">J</span></font><font
 color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <div>
  <div class="MsoNormal" style="text-align: center;" align="center"><font
 color="black" face="Times New Roman" size="3"><span
 style="font-size: 12pt; color: windowtext;">
  <hr tabindex="-1" align="center" size="2" width="100%"></span></font></div>
  <p class="MsoNormal"><b><font color="black" face="Tahoma" size="2"><span
 style="font-size: 10pt; font-family: Tahoma; color: windowtext; font-weight: bold;">From:</span></font></b><font
 color="black" face="Tahoma" size="2"><span
 style="font-size: 10pt; font-family: Tahoma; color: windowtext;">
<a class="moz-txt-link-abbreviated" href="mailto:iwe-admin@warhead.org.uk">iwe-admin@warhead.org.uk</a> [<a class="moz-txt-link-freetext" href="mailto:iwe-admin@warhead.org.uk">mailto:iwe-admin@warhead.org.uk</a>] <b><span
 style="font-weight: bold;">On Behalf Of </span></b>Bill Patient<br>
  <b><span style="font-weight: bold;">Sent:</span></b> Monday, February
05, 2007
10:42 PM<br>
  <b><span style="font-weight: bold;">To:</span></b> <a class="moz-txt-link-abbreviated" href="mailto:iwe@warhead.org.uk">iwe@warhead.org.uk</a><br>
  <b><span style="font-weight: bold;">Subject:</span></b> RE: [IWE]
UPDATE</span></font><font color="black"><span style="color: windowtext;"><o:p></o:p></span></font></p>
  </div>
  <p class="MsoNormal"><font color="#000066" face="Times New Roman"
 size="3"><span style="font-size: 12pt;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">Ok. Here
goes.<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">VNC
&#8220;listens&#8221; on a specific
set of ports on your home machine.<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">When you
call &#8220;vncserver&#8221; it
starts the vnc session and broadcasts on port 5801.<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">SSHd, when
set up, expects a connection on
port 22.<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">So, you must
allow port 22 traffic through
to the internal ip address of the machine you are connecting to (your
home
machine). Most likely, if it is the only machine on the router, the
address
will be 192.168.0.2&#8230;but you can check this with the standard tools. You
establish the firewall rule using the configuration screens of your
router. <o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">Now. Nearly
all companies will allow
traffic through port 22&#8230;not so for most other ports&#8230;so you should
be able to ssh to your home machine from inside the firewall.<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">Once you ssh
in, you can direct a forward
of port 5801 across the ssh connection.<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">When using
ssh (the windows version)..the
cmd was ssh2 &#8211;L 5802:localhost:5801 &lt;yourservernameorIPgoeshere&gt;
. <o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">You then
start vncviewer on your machine
at work and ask it to connect to localhost:2 since you forwarded 5801
from your
home machine to 5802 on your work machine via the ssh tunnel (the &#8211;L
switch).<o:p></o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p>&nbsp;</o:p></span></font></p>
  <div>
  <div class="MsoNormal" style="text-align: center;" align="center"><font
 color="black" face="Times New Roman" size="3"><span
 style="font-size: 12pt; color: windowtext;">
  <hr tabindex="-1" align="center" size="2" width="100%"></span></font></div>
  <p class="MsoNormal"><b><font color="black" face="Tahoma" size="2"><span
 style="font-size: 10pt; font-family: Tahoma; color: windowtext; font-weight: bold;">From:</span></font></b><font
 color="black" face="Tahoma" size="2"><span
 style="font-size: 10pt; font-family: Tahoma; color: windowtext;">
<a class="moz-txt-link-abbreviated" href="mailto:iwe-admin@warhead.org.uk">iwe-admin@warhead.org.uk</a> [<a class="moz-txt-link-freetext" href="mailto:iwe-admin@warhead.org.uk">mailto:iwe-admin@warhead.org.uk</a>] <b><span
 style="font-weight: bold;">On Behalf Of </span></b>Jay Burns IV<br>
  <b><span style="font-weight: bold;">Sent:</span></b> Monday, February
05, 2007
10:21 PM<br>
  <b><span style="font-weight: bold;">To:</span></b> <a class="moz-txt-link-abbreviated" href="mailto:iwe@warhead.org.uk">iwe@warhead.org.uk</a><br>
  <b><span style="font-weight: bold;">Subject:</span></b> Re: [IWE]
UPDATE</span></font><font color="black"><span style="color: windowtext;"><o:p></o:p></span></font></p>
  </div>
  <p class="MsoNormal"><font color="#000066" face="Times New Roman"
 size="3"><span style="font-size: 12pt;"><o:p>&nbsp;</o:p></span></font></p>
  <p class="MsoNormal"><font color="#000066" face="Comic Sans MS"
 size="3"><span style="font-size: 12pt; font-family: &quot;Comic Sans MS&quot;;">Andrew-<br>
  <br>
You're getting to the hairy edge of my knowledge on&nbsp; this, so expect me
to
misspeak sooner or later.<br>
  <br>
The cable modem is a Motorola Surfboard, in the 5000 series.&nbsp;&nbsp; So it
is not a router per se (at least, it doesn't appear to be).&nbsp; The router
is
directly wired to the Surfboard; it is a D-Link DI-624 wireless
router., It
does present a private LAN on the back side; it is set up to be a DHCP
server, and
gives my computer an IP address of 168.192.0.<i><span
 style="font-style: italic;">x</span></i>,
where x is generally 100 or 101. Its DHCP server address is
168.192.0.1.&nbsp;
That address is also set up as my default gateway.<br>
  <br>
When you say "program a port forward to your computer's IP and address
the
router's WAN address from the outside", exactly what do you mean?<br>
  <br>
jb4<br>
  <br>
  </span></font><br>
Andrew Grygus wrote: <o:p></o:p></p>
  <pre wrap=""><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">On Thu, 01 Feb 2007 20:28:20 -0600, Jay Burns IV wrote:<o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">&nbsp; <o:p></o:p></span></font></pre>
  <blockquote style="margin-top: 5pt; margin-bottom: 5pt;" type="cite">
    <pre wrap=""><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">Know about VNC, heard about SSH.<o:p></o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">Next idiot question goes something like, "VNC or SSH to /where/?"&nbsp; Home <o:p></o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">machine is generally off, and even if it were on, I currently haven't <o:p></o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">the slightest idea 1) what my cable modem's IP address is, and 2) How to <o:p></o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">get access to it on the other side of the router.<o:p></o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">(I'm educable, though, so any ideas on how to do that?&nbsp; The <o:p></o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">"documentation" that accompanies the router is just the other side of <o:p></o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">useless, and Comcast is generally inaccessible...)<o:p></o:p></span></font></pre>
    <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">&nbsp;&nbsp;&nbsp; <o:p></o:p></span></font></pre>
  </blockquote>
  <pre wrap=""><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">Generally a cable modem acts as a bridge and just passes traffic <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">through without an address change so if your computer is attached <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">directly to the cable modem the numbers you get by typing <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">ipconfig /all (Windows) are the real numbers accessable from <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">outside.<o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">If you have your own router between the cable modem and your <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">computer you can get the real addresses by loging into it and <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">checking the WAN status. If you have an internal router that <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">gives your local network a private address range (like 192.168.1.n) <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">you'll need to program a port forward to your computer's IP <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">and address the router's WAN address from the outside.<o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">If your cable modem is actually a router, giving you private addresses <o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">on the LAN, then you need information from the service provider.<o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">Andrew Grygus<o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">_______________________________________________<o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">IWE mailing list<o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><a href="mailto:IWE@warhead.org.uk">IWE@warhead.org.uk</a><o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><a
 href="http://lists.warhead.org.uk/mailman/listinfo/iwe">http://lists.warhead.org.uk/mailman/listinfo/iwe</a><o:p></o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;"><o:p>&nbsp;</o:p></span></font></pre>
  <pre><font color="#000066" face="Courier New" size="2"><span
 style="font-size: 10pt;">&nbsp; <o:p></o:p></span></font></pre>
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