I can ping but can't access websites - tricky issue!!

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EDW

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I'm in Cape Town and I get my internet through Mweb. My problems started when Telkom last week had outages. Since then all 4 pcs on my home network can't access any websites. I've now hardwired my laptop into the ADSL modem to try and work out what the problem is. I've spent an hour on the phone with Mweb but they've exhausted their list of fixes.. and the problem still remains. They can view when the modem is switchen on and off so the line is active.

I can ping IP addresses but can not view websites. I can do a telnet ie: telnet www.google.com 80 and that works. I have disabled my firewall and antivirus, rebooted. I've also added in DNS servers in TCP/IP as instructed by Mweb but to no avail.

The other odd thing is that my Skype works! FTP doesn't however. So there is some communication. I've also put firefox in safe mode, nothing. I've also run my pc in safe mode, nothing. My housemates are in the same situation so it is unlikely that there is anything wrong with my laptop.

Could the Telkom 5100 ADSL modem be dodgy?

ps - I'm currently connected to the net via my cellphone to log this problem ;-) Any help is greatly appreciated!
 
EDW said:
I'm in Cape Town and I get my internet through Mweb. My problems started when Telkom last week had outages. Since then all 4 pcs on my home network can't access any websites. I've now hardwired my laptop into the ADSL modem to try and work out what the problem is. I've spent an hour on the phone with Mweb but they've exhausted their list of fixes.. and the problem still remains. They can view when the modem is switchen on and off so the line is active.

I can ping IP addresses but can not view websites. I can do a telnet ie: telnet www.google.com 80 and that works. I have disabled my firewall and antivirus, rebooted. I've also added in DNS servers in TCP/IP as instructed by Mweb but to no avail.

The other odd thing is that my Skype works! FTP doesn't however. So there is some communication. I've also put firefox in safe mode, nothing. I've also run my pc in safe mode, nothing. My housemates are in the same situation so it is unlikely that there is anything wrong with my laptop.

Could the Telkom 5100 ADSL modem be dodgy?

ps - I'm currently connected to the net via my cellphone to log this problem ;-) Any help is greatly appreciated!
Click to expand...

Hi Call me I will help you out bud I had this problem , can be fixed in no time , I will pm you my details :)
 
just interested to know... if it can be fixed in no time, what was the problem then?
 
Hi Everyone..

I searched for this but did not find an answer.
My brother has an HP tablet. I have connected to a weak wireless signal in the area and was unable to browse the internet . However, I pinged yahoo.com that was just fine. I think that if I can ping that the signal is strong enough to browse. Am I mistaken?
 
Last edited:
to me, it sounds like faulty firewall software.
Have u installed any 3rd party firewall software on all the systems?
 
Wait, what changed here: "My problems started when Telkom last week had outages"

When that problem started, what did you do?

Because Skype still works, it is not a DNS issue. I suspect:
- Proxy settings in the browsers to proxy servers that no longer exist.
- Internet security software - AKA Antivirus - AKA Firewall.
 
davemc said:
Wait, what changed here: "My problems started when Telkom last week had outages"

When that problem started, what did you do?

Because Skype still works, it is not a DNS issue. I suspect:
- Proxy settings in the browsers to proxy servers that no longer exist.
- Internet security software - AKA Antivirus - AKA Firewall.
Click to expand...

as for the skype, I think it doesn't need DNS as once my DNS wasn't working and skype connected, I suspect that they have a fixed IP for the server so skype just connects to that IP bypassing DNS.
 
Reminds me of having the wrong MTU on iBurst. Not sure you get the same problem on ADSL.

My advice: Reset your modem/router to factory defaults, and run the setup wizard again
 
Thanks for the replies guys, appreciate it. To answer a few questions:

@alkit - I haven't installed any 3rd party firewall software on all the systems. We are 4 housemates with 4 laptops, previously I just gave them the WEP key and it worked fine! All bog standard Microsoft security stuff. One one pc I removed Symantec and switched off the firewall - but still couldn't connect.

@davemc - Telkom & Mweb reported connectivity issues last week, I'm not sure exactly what they were but there were problems and mweb were issuing different DNS settings to some clients to resolve the issue. They were surprised when it didn't work for me. You talk about Proxy settings, help me out here about how to remove/edit them?

@Gatecrasher - what is MTU? I have reset the modem and router... nothing :-(

Mineer said:
checked DNS first
208.067.222.222
208.067.220.220
Click to expand...

What do I do with these IP addresses? Do I put them in TCP/IP?
 
yes
control panel-> network connections-> right click local areaconnection-> properties-> double click tcp-Ip internet protocol-> use the following DNS's

208.067.222.222
208.067.220.220
:cool:
 
I tried all of the suggestions above but sadly none of them worked. It was then suggested to me to get my 'ports reset on my telkom line' so I called them up 0800 375375, got them reset but it still didn't work but then when I then entered in the IP's below again... it WORKED! It feels great to be back online again!

Mineer said:
yes
control panel-> network connections-> right click local areaconnection-> properties-> double click tcp-Ip internet protocol-> use the following DNS's

208.067.222.222
208.067.220.220
:cool:
Click to expand...

Thanks all for your help guys!
 
Last edited:
Ja, suspected that it was an DNS problem from the start, and the last post by the OP confirmed it.

Somehow the DNS cache got "stuck" or corrupt... resulting in no more DNS updates.
 
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