<font size="2"><font face="tahoma,sans-serif">Is SSH listening on the internal address ?<br></font></font><br><div class="gmail_quote">On Thu, Aug 4, 2011 at 4:06 PM, Michael Mol <span dir="ltr"><<a href="mailto:mikemol@gmail.com">mikemol@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">You can identify a TCP connection by as a<br>
sourceip:sourceport/destip:destport set. You can only have one<br>
connection with a particular combination of source and destination IPs<br>
and ports. You can have an effectively infinite number of connections<br>
to the same destination port at a destination IP. (roughly four<br>
billion times sixty-five thousand, but you'll hit resource limits on<br>
the server machine long before you approach that kind of theoretical<br>
number)<br>
<br>
Typically, multiple connections are allowed by changing the source<br>
port for each connection. I can have twenty concurrent SSH connections<br>
to the same destination box, and the only problem I'll have is keeping<br>
track of all my SSH clients.<br>
<br>
On Thu, Aug 4, 2011 at 4:00 PM, Eric Beversluis<br>
<div><div></div><div class="h5"><<a href="mailto:ebever@researchintegration.org">ebever@researchintegration.org</a>> wrote:<br>
> Hypothesis: I need to use NX to get from my windows machine to my linux<br>
> machine (dead screen) to use ssh on the latter. Since the server I'm<br>
> trying to access from inside the office is also the LAN router, does<br>
> that "occupy" port 22 so I can't then ssh from the linux box to the<br>
> server/router? Whereas, when I'm ssh-ing to that server from the outside<br>
> I'm not tying up its port 22? But, on the other hand, I'm now using port<br>
> 22 twice on the linux box when I use NX to get to the linux box and then<br>
> use ssh from the linux box to an outside box?<br>
><br>
> On Thu, 2011-08-04 at 14:33 -0400, Joseph Workman wrote:<br>
>> Is SSH listening on that IP<br>
>><br>
>> On Aug 4, 2011 2:23 PM, "Michael Mol" <<a href="mailto:mikemol@gmail.com">mikemol@gmail.com</a>> wrote:<br>
>> > On Thu, Aug 4, 2011 at 2:20 PM, Eric Beversluis<br>
>> > <<a href="mailto:ebever@researchintegration.org">ebever@researchintegration.org</a>> wrote:<br>
>> >> The box has a public IP to the 2Wire modem and the outside and it's<br>
>> >> NATting the LAN. So when I'm trying to ssh in locally I've got a<br>
>> private<br>
>> >> address on the LAN and trying to reach the box at its private<br>
>> address.<br>
>> >> Both the (public) URL and the private address work with a browser.<br>
>> I can<br>
>> >> ping the box on its private IP address.<br>
>> ><br>
>> > Can you access the box at its public IP from the internal network?<br>
>> ><br>
>> > Is it possible the box has firewall rules which drop packets to port<br>
>> > 22 from the internal network?<br>
>> ><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br><div><font face="times new roman,serif" color="#006600">Joseph Workman</font></div><div><span style="font-family:'times new roman', serif;color:rgb(0, 102, 0)">C.616.734.1411</span></div>
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