Could not connect to RD within same IP Range.

I would really appreciate if you could help me out with my current RD
problem.
I have 2 static IPs one assigned to my Desktop and another one to my Laptop.
While I am in office, I use static IP and whlie in home I use Wireless. Both
Subnet and Default Gateway are same for these 2 static IPs. I am able to
connect to the Desktop RD from my home through my Laptop. But I could not
connect when I use the another Static IP (which I use when I am in office).
I am not even able to Ping from each of these machines. My Remote Desktop is
accessible to everyone in my Team including me when I am in my Home. But I
don't know why I am unable to access this RD when I use another Static IP
which has same Subnet and Default Gateway. I don't know whether this is a
problem or something else I need to look into. Could you please help me out
in this? I direly need this working. I must be able to access RD from my
Laptop when I use another IP.

IPs are like
12.36.126.68
12.36.126.70

Subnet: 255.255.255.0 for both
Default Gateway: 12.36.126.9 for both.

Please help me!!! Thanks a bunch!!

Thanks,
KLN.

 

Two networks located in two different geographical locations both running
the same TCP/IP "segment" can never connect to each other over the Internet.
The Internet is a Layer3 routed network and each "hop" along a particular
path is always a different TCP/IP Segment.

They could connect over a Private Leased Line (doesn't use the Internet)
that is running the routers in "Bridged Mode",...but there is no indication
that this is what you are dealing with.

VPN won't help,...VPN needs the two "ends" to be different TCP/IP Segments.
VPN also expects the VPN Device to have one public Interface and one Private
Interface. This also implies that the LAN is expected to be separated from
the Public Internet and exist within a Private Network running RFC Private
Addresses (which you aren't).

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
-----------------------------------------------------
Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp

Deployment Guidelines for ISA Server 2004 Enterprise Edition
http://www.microsoft.com/technet/prodtechnol/isa/2004/deploy/dgisaserver.mspx

 

Thanks a lot for you answer! I posted several messages in different forums
but they seem to have problem even in understanding my problem and
eventually I did not get any help from them. Also, I would like to clarify
onething form you, please. You told me different "geographical" location?
These 2 IPs are using in office. As I mentioned, one is for my Desktop PC
and another to Laptop while I am in office. Does it ring any bell? If still
your answer is No, then is there a way I can get this working? Please let me
know if you would like further explaination. Thanks a ton for your help!

Thanks,
KLN.

 

Ooohhh, yes. The head ache is starting

I'm sorry, what you are doing is no more clear to me than the first time you
explained it. Unless I get a drastic re-understanding of what you
have,...my last answer is still the answer.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

 

I am sorry if I caused any confusion. Here is the clear picture.


office Desktop PC
(12.36.126.68 / Static IP / T1 Line)
|
_______|_______
| |
From Home From Office <===
Laptop
(WLAN / Dynamic IP) (12.36.126.70/Static IP/T1)
From home ==> I am able to RD to Office Desktop PC
From Office ==> Unable to RD to desktop PC. Not even able to Ping it.

Two static IPs are in Same Subnet as Mentioned earlier. When I come to
office, I just plugin the T1 Cable thats it. I don't do anything else.
Please let me know if you would like any further clarification.

Thanks a ton!

Regards,
KLN.

 

There isn't anything I can do with this.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

 

You mean, you did not understand the information?
Pelase let me know. I will provide you more info.

Thanks,
KLN.

 

Yes.
I do not even know what to ask for anymore.

All I know is that you have
1. a network at the office
2. a network at home
3. a T1 floating around somewhere (no idea if it is Private or Internet)
4. there is a desktop machine at the office that a laptop can connect to
from home
but not when the laptop is in the office

I don't know what you mean by " I just plugin the T1 Cable thats it" since
you don't connect/disconnect T1 lines "at will" like that especially
considering that both ends of a T1 go into a CSU/DSU and have nothing to do
with what you do with the laptop.

That is it. There is nothing I can do with that, and at this point I don't
even know what to ask for.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
-----------------------------------------------------
Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp

Deployment Guidelines for ISA Server 2004 Enterprise Edition
http://www.microsoft.com/technet/prodtechnol/isa/2004/deploy/dgisaserver.mspx
-----------------------------------------------------

 

Sorry! Here is furuther more clear explaination.

There is no LAN or any Network in office.
I am given 2 static IPs to my office by ISP.
12.36.126.68 and 12.36.126.70.

12.36.126.68 this IP is assigened to a Desktop in office. I enabled RD in it
and my team from India uses this Desktop using that IP. Its open to public.
Another IP (12.36.126.70) is used to my Laptop when I come to office. I have
a cable from a port (Just Like telephone cable), which seems to be from
Router or something which I don't know. (This is also a case with Desktop).
I just plug in that cable to my Laptop to get the internet connection. This
is also public IP and evryone can RD to my Laptop.

I use the same Laptop at both Office and Home. In home I have WLAN. So some
dynamic IP is assigned and I am able to RD to Desktop PC in office. While I
use the Laptop in office, i.e when I use another IP (12.36.126.70), I am
unable to RD to Desktop PC, and I am even unale to Ping it.

To put it simply, the problem is: I am unable to ping / Rd to my Desktop PC
from my Laptop which are using two Public IPs as mentioned above. But My RD
and Laptop are accessible to Public.

Hope this gives you clear idea.

YES. RIGHT.

Thank you so much for your patience and help!

Regards,
KLN.

 

Ok, that is much better. I understand what you are doing now. Nothing comes
to mind at the moment as to the cause, but it is late in the day and I'm
ready to head out of here. Let me think about it and get back in the
morning. Of course someone else may have an idea and jump in too, now that
the situation is more clearly explained,..and that would be fine. So I'll
check it out again in the morning if someone hasn't solved it by then.

What is the Subnet Mask and Default Gateway that goes with those two public
IP#s?

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

 

Thank you So much!!!
For both, Subnet and Default Gateways are same.
Here are the details.

Subnet: 255.255.255.0 for both
Default Gateway: 12.36.126.9 for both.

Please let me know if you would like further details. Its really strange.

Regards,
KLN.

 

Hi Phillip,

Did you get a chance to think about it? Please help me.
Thanks a lot!

Regards,
KLN.

 

Only one thing. This device at the office that you said you weren't sure if
it was a router or not. It may be preventing the machine from communicating

If I were you I would not even use ports in that manner on the "router". I
would buy a simple cheap Hub or Switch and plug only it into the router then
plug the PC's into the Switch/Hub. They would communicate via the Switch/Hub
and not eve involve the "router". Also make sure that any "personal
firewalls" are not getting in the way (Windows Firewall, Zone Alarm, etc)

If that does not work, then I am at a total loss for suggestions. You would
have to go to the people that rigged all this equipment up and sort it out
with them. I have never seen anything setup this way (why it took so long
to understand what you were describing),..I know I would never use anything
this way.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
-----------------------------------------------------
Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp

Deployment Guidelines for ISA Server 2004 Enterprise Edition
http://www.microsoft.com/technet/prodtechnol/isa/2004/deploy/dgisaserver.mspx
-----------------------------------------------------

 

Thank you, Phillip. But everyone else is able to access Desktop PC directly
with that IP. I am going mad why this problem only when I use another IP.
Initially I thought its becuase IPs are in same Subnet as I am an novice in
networking. I tired accessing directly with System Name. Nothing worked.
However, thank you for you help. If you get anything in mind, pls let me
know. Also, as those IPs are provided by ISPs I don't know what to do with
them. I am just using them for my Internet connection. Thanks again.

Regards,
KLN.

 

You said:
-------------
There is no LAN or any Network in office.
I am given 2 static IPs to my office by ISP.
12.36.126.68 and 12.36.126.70.
-------------

So there is no "everyone else" in the office, there is only the two
machines. Eveyone else *outside* the office is irrelevant. You said that
outside the office (eg. Home) it works fine. Whatever happens outside the
office is totally separate from what happens inside the office,..the two
have *no* bearing on each other. What I told in the last post about using a
Hub or Switch is to deal with *inside*, and doesn't have anything to with
with outside the office.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
-----------------------------------------------------
Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp

Deployment Guidelines for ISA Server 2004 Enterprise Edition
http://www.microsoft.com/technet/prodtechnol/isa/2004/deploy/dgisaserver.mspx
-----------------------------------------------------

 

Yes, Phillip. There are 2 machines that use those two static IPs. "Everyone
else" I mean Public. So, Public can access both my Lap and Desktop with
those IPs. Since both are public IPs, I am assuming both can connect to each
as they are by Public. And yes, there is no Network. Each is assigned to one
public IP. thats it. I am sorry if I am being vauge. Thank you!

Regards,
KLN.