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Can't access Codian Web Pages from outside network(but can ping)

Oour internal network consists of:

Headquarters:
192.168.0/24 for  general use
10.150.0.0/24 for VTC

Office #1:
10.150.1.0/24 for  general use

Office #2:
10.150.2.0/24 for general  use

etc.

Our VTC infrastructure is alllocated at Headquarters, on  the 10.150.0.0/24 LAN.

Connection between offices is via MPLS  network.

In order for our VCS units to be able to access the different  networks, we have set up static routes in the VCS using the command  line.

I am able to access the VCS units via http or https, from a pC on  the 192.168.1.0/24 LAN.

I recently set up (2) 4505 MCUs on the 10.150.0.0/24  LAN with the same staic routes, and I can't access their web pages from  192.168.1.0/24.

I CAN access them from a PC on 10.150.0.0/24  LAN.

Also, from 192.168.1.0/24 LAN, I can ping the MCU.


I  can't figure out what would cause this.
9 REPLIES

Can't access Codian Web Pages from outside network(but can ping)

Most issues I had seen accessing systems are firewalls or proxies blocking the requests.

If you have a network admin in your company get him on board, he might be able to help you here.

In addition double check your routes and that the addresses are unique and valid.

What I had seen sometimes is if you accessed for example the VCS, like

http://10.10.10.2

it automatically forwards you to the https page.

https://10.10.10.2

if you then try to change the 2 to a 3 because thats your mcu

https://10.10.10.3

it failed because the MCU did not had https enabled (or even lacked the encryption option key)

(remider for all: get the encryption option key and enable https and call encrypion)

Try if you manually enter:

http:// if you can access it.

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New Member

Can't access Codian Web Pages from outside network(but can ping)

My IT guys swear that there are no firewalls or proxies between the subnets-all traffic should be able to get to any of them(so they say).

I am using the straight IP address, as the MCUs are not yet registereed in our dns. No luck either http or https.

Can't access Codian Web Pages from outside network(but can ping)

If there is nothings in between it shall work ;-)

Did you try an other browser or computer?

Often browsers are enabled to auto discover a proxy or you might have a local firewall

or specific routes / vpn wich can lock something up in addition.

For now I would not handle it as a mcu / telepresence specific issue, rather then a

network troubleshoot thing. So pop up wireshark and see where on the way the request gets lost.

There is no NAT or ALG involved? Do you use only the first port on the MCU?

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New Member

Re: Can't access Codian Web Pages from outside network(but can p

"If there is nothings in between it shall work ;-)"

Yeah, I agree....but I thought maybe there was something I was missing about the MCU itself-the thing that really gets me is that the VCSs CAN connect, but not the MCUs.......

Wireshark traces are strange to me-I did one from a PC on the 10.150.0.0 LAN, and another from a PC on the 192.168.1.0 LAN-they look identical to me, with http packets in both directions-and then the one from 192.168.1.0 LAN just stops......

I did try different browsers(chrome and IE). Will try another PC.

Can't access Codian Web Pages from outside network(but can ping)

Yea, advanced knowledge of TCP/IP is handy when dealing with wireshark / tcpump.

But in such cases it can come quite handy.

Thats why I said, bring in your network guys, they shall know how to identify where

the communication is lost.

In addition you could try to do a traceroute from both sides to see if the routes go as expected.

There are also some port scan tools, ...

Its generic trouble shooting, I am sitting on the left side and I can not reach the right side,

what is blocking it, ...

You may have heard of the ISO-7-Layer model, I am more looking at the lower levels

first, if I do not see it on the network the higher layers can not work neither :-)

Many browsers have auto proxy detection enabled by default, so if you have a proxy

this can still be a fault if your webbrowser tries to be to clever :-)

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New Member

Re: Can't access Codian Web Pages from outside network(but can p

Hi Andy

Did you make sure that Port 80 is checked for Port B in Network/Services? Didn't used to be by default.

c/

New Member

Re: Can't access Codian Web Pages from outside network(but can p

Hi Craig:

Port  is not enabled on my MCUs.

thanks,

New Member

Can't access Codian Web Pages from outside network(but can ping)

Sorry for wasting your time here-it turns out i had set the wrong default gateway on the MCUs.

Once I fixed that, http to the MCUs works fine.

Can't access Codian Web Pages from outside network(but can ping)

Hi Andy!

Yes, thats what I expected earlier

In addition double check your routes and that the addresses are unique and valid.

so, perfect that you found and fixed it the problem and thx for the feedback!

Andy, Could you please rate my answers and set the thread to answered, then its not a waste of time :-)

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