A few months back, I received an email from one of the visitor of this blog asking me about this problem, "limited connectivity". The good news is that this error happen rarely if you own a Windows XP based machine. The bad news is, the probability of having to face this error on a machine with Vista OS is greater. Limited connectivity error is a result of the mulfunctioning DHCP system.

Diagnosis:
Celcom Broadband utilized Public Dynamic IP, meaning that there is a big chance that you might be sharing an IP with someone else. Celcom provide a "pool of IPs" and each time your computer connect to the internet, you will never know which IP you will be assigned untill you are connected to the internet network. The system which control this is called the DHCP (Dynamic Host Configuration Protocol).

Scenario:
Everytime you start a PDP session a.k.a. creating a connection to the internet network, (in this case, since you do not have a specific IP) your computer will send a request to the Celcom Server asking for an IP. Due to network error, the server did not respond to your computer request. After several request went unanswered, your computer will create a dummy IP (usually starting from 169.***.***.***). What happen is that the data session bridging is success but no reply from the ISP server. Just imagine a car moving from point A to point B. The highway connecting A and B is available but the car is out of petrol.

Solutions:
1. Connection is there but without a valid IP address. Thats why it shows erorr "limited connectivity".
2. Without valid IP your connection to the internet network is meaningless because other computers and servers on the network will not recognize or communicate with your computer and vice versa.
3.Rebooting your computer usually solved this problem.
4. Or, try to change your network band (e.g. from 3G only to GPRS only etc.)
5.If you are on Vista OS, upgrading your drivers/firmware is the best bet if you frequently bugged by this problem. There is an unconfirmed report (but highly possible) about the problem with Vista`s TCP/IP with some old modems and routers.

--
Andrey Arshavin The Legend
amrymr.blogspot.com

Good day..

New updates on this unintentional rerouting to vlbdc.com website.
1. its not virus or a malware
2. its a network error
3. only effect Celcom Mobile Broadband PREPAID customers (so far there is no such same report for postpaid broadband)
4. usually happen during peak hours..

how to solve?
openDNS!!! remember these number [Preferred DNS:208.67.222.222 and Alternate DNS:208.67.220.220]. Tested before and it works!!

For XP users: Go to control panel> network Connections> then right click on your existing connection> click properties> networking> and double click on TCP/IP.

For Vista users:
Go to control panel> View network status and tasks> View status> Properties> Internet Protocol Version 4 (TCP/IPv4), then click the Properties button> Click the radio button Use the following DNS server addresses: and type in addresses in the Preferred DNS server and Alternate DNS server fields.

--
Andrey Arshavin The Legend
amrymr.blogspot.com

For Celcom Mobile Broadband subscriber, sometimes you may face this kind of error.

Root Problem:
1. Network congestion - computer failed to do successful dial up operation due to the unavailability or failure to transmit data packets.
2. Hardware problem - Modem not connected properly or the USB contact point damaged (for USB modem).
3. For For Broadband package subscribed together with a voice plan, in some remote cases voice mail system may interrupt with the computer dialing system.

Solutions:
For network error, just contact your service provider. If the error is not caused by network congestion, you can try to do these steps:

Go to control Panel>>Phone and Modem Options>>Modem>>(highlight your modem)>>properties>Modem tab and unchecked wait for dial tone before dialing.

In some remote cases, receiving voice mail while the computer is attempting to execute dial up networking may confuse your computer into thinking that there is no valid dial tone (this is because some voice mail system keep sending a beeping signal which will wrongly interpreted by the computer). Depending on the carrier you subscribed, try to check that your computer setting is set to the correct local country so that your computer is listening to the correct dialing tone.

Start>Control Panel>Printers and Other Hardware>Phone and Modem Options>Dialing Rules>Edit>General tab>make sure that the correct country is listed under Country/region.

--
Andrey Arshavin The Legend
amrymr.blogspot.com