Problems with DNS caching [SOLVED]

[GermanTux]

OK, this is a pretty extreme thing to try, but I would honestly look at getting a 802.11a AP with a 802.11A card to try and solve this problem.  I think neighboring units are interfering with your signal.  This, however, is probably going to run you 300 euros. 

Also, Huwaei[sp?] is a Chinese company that produces bottom-of-the-barrel stuff.   I might look at getting a new router.  A Cisco/Linksys or D-link.  The Asus stuff is pretty decent as well.  It would be a cheaper alternative. 

[Just17]

To move the router doesn't work   

I lost the connection again, looks connected but I can't navigate, after turn off-on the router I can navigate again.

From that I gather that the modem to the ISP connection is breaking and not the PC to modem.

It is behaving as if the router is synced at too high a speed for continuous connection.

Maybe asking your ISP to reduce the speed a little would give you a more solid connection.

[Aleph]

look at getting a 802.11a AP

I'll wait...

Maybe asking your ISP to reduce the speed a little would give you a more solid connection.

I was looking for but I don't know how to do it.

[Just17]

look at getting a 802.11a AP

I'll wait...

Maybe asking your ISP to reduce the speed a little would give you a more solid connection.

I was looking for but I don't know how to do it.

But before we jump to that ......  please try  ......   keep a browser open at the settings of your router.

There should be a status page there.
It should show the state of the connection.

Check that regularly .....  but particularly when you lose connection.

If the router is losing connection to the ISP, it should show up on the status page as Disconnected, or something similar.

If you can confirm that is happening, then we know where to look for the problem.

[Aleph]

Yesterday I had other disconnection in the night. I had a web browser open with the router settings, but after the disconnection I could not open this web page, I had not connection with my router.

I restarted the router and did iwlist scan on terminal. I get 8 wifi connections, the channels where the numbers 2, 5, 6-6, 12, 11, 12, the mine is the 1. 

[Just17]

Yesterday I had other disconnection in the night. I had a web browser open with the router settings, but after the disconnection I could not open this web page, I had not connection with my router.

I feel like we are going around in circles  

If you could not navigate the router page when the problem arose then the disconnect is between you and the router; so your ISP is not involved.

I restarted the router and did iwlist scan on terminal. I get 8 wifi connections, the channels where the numbers 2, 5, 6-6, 12, 11, 12, the mine is the 1.  

If I understand correctly the router wifi channel is set to  1

Try setting the channel in the router to 11 instead of 1.

...  and test with a browser pointed to the router status page.


***

I am having a difficult time imagining what could be causing your problem, other than interference.
The wifi signal is being lost between router and PC.
It happens with multiple PCs.
It happens with more than one router.

***

Something I forgot to ask ........  did the technician check the ADSL filters on the line to ensure there is no interference between telephone & broadband connections?

[Aleph]

I feel like we are going around in circles 

  too.

If I understand correctly the router wifi channel is set to  1

Try setting the channel in the router to 11 instead of 1.

...  and test with a browser pointed to the router status page.

Yes, my router was set to channel 1, now I have changed it to 11.

did the technician check the ADSL filters on the line to ensure there is no interference between telephone & broadband connections?

I don't know, but I think no. My company is Vodafone, my telephone line is a bit weird, work with a SIM card like a movil phone. The ADSL was working very well for a year more o less, but now I had this problem. Maybe the solution is change the ADSL company...

[Aleph]

I was looking for a filter and, effectively, I don't have any filter, the router jack is connected directly. My telephone line is wireless and works with a SIM card.

[Just17]

I was looking for a filter and, effectively, I don't have any filter, the router jack is connected directly. My telephone line is wireless and works with a SIM card.

OK .......  your broadband is delivered via fixed wireless, so not telephone lines or filters involved.

We will wait and see if changing the router channel has made any difference ....

[janasx1]

Here is what I normally do to diagnose wireless internet problems.
Probably, you tried all these, but since I am not clear on what are things are tried and what problems are isolated, I am suggesting below steps.
It will also help us, if you can report back in which step below the dropping happens.

1. dissable all fancy stuff like dns caching (my instructions are not working )
2. connect with ethernet cable via the router, try using the internet see if the connections are dropping. If yes then the router is not able to keep the connection with the ISP.
3. if above step succeeds, just change the connection type from wired to wireless and no other change. If your area is too crowded, I would just put mac filtering and no encryption. Adding mac filter will prevent others from using your connection. But be very careful that your mac is in the list. Now check if the connection is holding.
4. if above step drops connection, try changing the channel etc. and other suggestions provided here.
5. If any you are able to get a connection without dropping, enable the basic encryption. Probably WEP and key sharing.
6. If any you are able to get a connection without dropping, then you have solved most of the issues and you can try dns caching.

[Aleph]

I had other disconnection yesterday in the night....   


Hi janasx1

1. dissable all fancy stuff like dns caching (my instructions are not working  )

      Ok, I could not try the dns caching...

2. connect with ethernet cable via the router, try using the internet see if the connections are dropping. If yes then the router is not able to keep the connection with the ISP.
     
     The ethernet cable via the router work fine, I never have disconnections.

3. if above step succeeds, just change the connection type from wired to wireless and no other change. If your area is too crowded, I would just put mac filtering and no encryption. Adding mac filter will prevent others from using your connection. But be very careful that your mac is in the list. Now check if the connection is holding.

      I did the MAC filtering now.

4. if above step drops connection, try changing the channel etc. and other suggestions provided here.

      I'll wait to see if now work with MAC filtering.

5. If any you are able to get a connection without dropping, enable the basic encryption. Probably WEP and key sharing.

      I'll wait to see if now work with MAC filtering.

6. If any you are able to get a connection without dropping, then you have solved most of the issues and you can try dns caching.



Now I changed the pasword and the SSID. Is possible that I have a intrusion? a neighbor trying to steal my wifi?

[Just17]

What encryption method is used for the wifi connection between your PC and router? ......  WEP, WPA, WPA PSK ?

[Aleph]

Hi janasx1

3. if above step succeeds, just change the connection type from wired to wireless and no other change. If your area is too crowded, I would just put mac filtering and no encryption. Adding mac filter will prevent others from using your connection. But be very careful that your mac is in the list. Now check if the connection is holding.

      I did the MAC filtering now.

Sorry, I have problems with MAC filtering, maybe I am doing something wrong, the MAC numbers are ok but it doesn't work. 

What encryption method is used for the wifi connection between your PC and router? ......  WEP, WPA, WPA PSK ?

WPA PSK

[Just17]

Hi janasx1

3. if above step succeeds, just change the connection type from wired to wireless and no other change. If your area is too crowded, I would just put mac filtering and no encryption. Adding mac filter will prevent others from using your connection. But be very careful that your mac is in the list. Now check if the connection is holding.

      I did the MAC filtering now.

Sorry, I have problems with MAC filtering, maybe I am doing something wrong, the MAC numbers are ok but it doesn't work. 

What encryption method is used for the wifi connection between your PC and router? ......  WEP, WPA, WPA PSK ?

WPA PSK

For some tests you should try connecting without any encryption ......  but it would be adviseable to have MAC filtering in place first .....  not that it is very secure, but it would prevent others from connecting to your router in error.

I have forgotten if this was mentioned ..........  is the router broadcasting the SSID?
Ensure it does, in the most persistent way possible. This should help reconnection if there is a drop .....

[Aleph]

Hi friends,

The solution is near...

I did a new complain to my adsl company, Vodafone. Now they said that the Huawei router has a reported problem about wifi disconnections, I am trying to change it for a router Cisco, I will have an answer in the next days.

Also, Huwaei[sp?] is a Chinese company that produces bottom-of-the-barrel stuff.   I might look at getting a new router.  A Cisco/Linksys or D-link.  The Asus stuff is pretty decent as well.  It would be a cheaper alternative.

German Tux, you are right...