limited to joining initial netwok

Questions about networking
Forum rules
Before you post please read this
anthonyh
Level 1
Level 1
Posts: 7
Joined: Thu Dec 31, 2015 4:35 pm

limited to joining initial netwok

Postby anthonyh » Fri Jan 29, 2016 8:40 am

Hi forum, I have an odd query.
I have installed LMDE on three occasions recently and in each case I can only access the internet if I use the very same ISP that I connected with at the point of installing with the disk.

I experienced this with two different ISPs and it affects both wifi and ethernet. The laptop will not work at an internet cafe for example.

I can "join" alternative ISPs wired or wireless and obtain IP addresses from them. I can ping within the local network to and from but never resolve external addresses.

I used the same installation disk each time so it is possible something was not properly installed due to disk error. However I can't see why if there was an error I get no warnings and no problems connecting and browsing limited to one initial ISP that the installation allows.

Any suggestions for troubleshooting my setup would be most appreciated.

AnthonyH

anthonyh
Level 1
Level 1
Posts: 7
Joined: Thu Dec 31, 2015 4:35 pm

Re: limited to joining initial network [solved]

Postby anthonyh » Fri Jan 29, 2016 9:16 am

Hi again, I have an answer in part.

The DNS servers seemed to be the problem and to fix this I edited /etc/resolv.conf as root even though the warning in the file suggested my settings would be overwritten. So far they haven't been.

I use # to comment out the existing names and added two open dns servers instead in this case 208.67.222.222 and 208.67.220.220 for opendns.

So far this has enabled me to browse using different ips but it does not explain why this restriction occurred in the first place.

AnthonyH

bigbenaugust
Level 3
Level 3
Posts: 107
Joined: Wed Dec 07, 2011 2:46 pm
Location: the 919

Re: limited to joining initial netwok

Postby bigbenaugust » Fri Jan 29, 2016 12:43 pm

It is possible that your ISP is limiting its DNS service to only receive requests on its own network. Thus, you may be unable to make DNS requests to your ISP from the internet cafe, or even vice-versa.
--Ben


Return to “Networking”