Can't RDP from some IP's

Hi guys,

I am having a strange issues which has got to be a block, but I am not sure where.
I can not RDP or open an OWA  on some computers  on external networks.  However on others it all works fine.

By external sites I mean the server is located in one office. And my home computer for example can't open the connection.  

I can RDP in from some other locations and open the OWA at other locations but nothing from my home and a couple of moblie broadband locations.

I suspect it is the router or the server that is blocking me but I really don't know.

It was all working up till 2 days ago.


I had a power outage at this site the other day and ever since the email was playing up, I believe this was a DNS / DHCP issue and it has been resolve but I am stuck a bit

i have run a traceroute from one of the locations that is playing up and won't connect  it has  alot of time out requests
AlwayslearningmoreAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

AlwayslearningmoreAuthor Commented:
The router is a 2830 ADSL2_
The server is running sbs2011
0
Larry Struckmeyer MVPCommented:
Hello:

Can you verify that the edge device (router or firewall) is forwarding 443 and 3389 to the IP of the SBS?  Can you run the internet connection wizard on the SBS to verify the SBS is set to accept these requests.
0
AlwayslearningmoreAuthor Commented:
Yes the firewall is open.
Yes I ran the internet connection wizard just yesterday in fact.  

I did not have the issue before running the wizard. I was having another issue regarding iphones not connecting to exchange, which has since been resolved.
0
Making Bulk Changes to Active Directory

Watch this video to see how easy it is to make mass changes to Active Directory from an external text file without using complicated scripts.

dan_blagutCommented:
HI
From the office where the connection can be established , then from the other office run
ping RDPServer
tracert RDPServer


If Ping can't find the server you have a DNS problem
If ping can't have a reply then , you can look at tracert result to see where the packet is lost.
When you compare the two tracert result you can see where is blocked.

Dan
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
AlwayslearningmoreAuthor Commented:
At the location that is working i get

 5    58 ms    55 ms    48 ms  telstr7222243.lnk.tel
 6    47 ms    47 ms    48 ms  172.18.241.102
 7    47 ms    73 ms    55 ms  172.18.80.138
 8    49 ms    63 ms    64 ms  172.18.70.150

However at the one that is not after
5    58 ms    55 ms    48 ms  telstr7222243.lnk.tel

I get nothing .

my internal network is on 10.0.0.xxx not 172.18.x.x.

so what does that mean is it my ISP ?
0
dan_blagutCommented:
how your office are connected each other? Your or ISP VPN?
0
AlwayslearningmoreAuthor Commented:
Just ISP normal internet connection no VPN
0
AlwayslearningmoreAuthor Commented:
So i logged into the server from another location that works tonight.

Now I can't ping the router from the server however other computers on the network can ping the router.

Mail is still flowing to my exchange server.

At this point I am going to replace the router when onsite tomorrow morning but what if this does not resolve my issue.

Could the DNS on the server be causing this issue.?
How can I reset my server DNS again  if required?

Thanks guys
0
David AtkinTechnical DirectorCommented:
Are you using your RDP gateway or just straight to the server on port 3389?

It won't be the DNS on your server causing the issue. I think Dan was suggesting a possible external DNS issue?

The 172.18 network is your ISP.

Are you connecting via your DNS name or your external IP address?  -  If its via DNS name then try the IP address.

However at the one that is not after
5    58 ms    55 ms    48 ms  telstr7222243.lnk.tel

I get nothing .

This maybe nothing.  If you're not on the ISP's network it may block ICMP requests and won;t respond.
0
AlwayslearningmoreAuthor Commented:
I am not 100% sure what you mean here
"Are you using your RDP gateway or just straight to the server on port 3389?"
I am pretty sure it is just straight to the port 3389


I will talk with the ISP tomorrow. to see if they are blocking the requests.

I tried connecting via the IP and still no go.

Do you have any ideas on why my server would have stopped talking to the router but the mail is still flowing.
0
AlwayslearningmoreAuthor Commented:
Thanks for your help btw . I really appreciate the feedback guys/girls - Off to bed
0
David AtkinTechnical DirectorCommented:
Hello,

When you connect and it fails, does it get to the point where its asking for a username and password or does it fail before that?
0
AlwayslearningmoreAuthor Commented:
Nah I am never asked for a Username or password
0
AlwayslearningmoreAuthor Commented:
I have contacted the ISP and they can see a problem on their side. Thanks for your help guys. I am also awaiting a new router to fix the internal network issue.
0
David AtkinTechnical DirectorCommented:
Thanks for letting us know.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.