On 28/5/2017 13:11, VanguardLH wrote:

Stef wrote:

Steve Hayes wrote:

This morning I suddenly lost my connection to the web while I was
browsing.

Mail still worked, news still worked, but the web connection did not.

I reset the router, rebooted my computer, but still nothing.

I wondered if it was a browser fault (I use Firefox) so tried Internet
Explorer. It too could not connect, but offered to run diagnostics.
This is what was found:

---- diagnostic report ----
[snip]


DNS Client Diagnostic
DNS - Not a home user scenario

info Using Web Proxy: no
info Resolving name ok for (www.microsoft.com): yes
No DNS servers

DNS failure

I haven't read the entire thread, but this is mostly likely your
problem.

Your default Domain Name Server is down or can't be accessed. When you
can't access "The Web" with your browser, but mail, ftp, etc work
(they don't use DNS), that's where I'd start the troubleshooting.

WRONG. Anytime you use a hostname (host.domain.tld) to specify a host,
like for an e-mail or ftp or "etc" server, DNS gets used. Humans like
names. Computers demand numbers. How many times have you encountered a
user that specifies the IP address address for their e-mail server when
configuring an account within their local e-mail client? Look at your
own e-mail config in whatever local e-mail client you use. Did you
enter a hostname or an IP address? Unless you do the DNS lookup when
configuring the e-mail account in your e-mail client, you don't get that
info from the e-mail provider as they give you hostnames. How many web
pages have you visited where absolute references (non-relative or just a
path under the current location) to sources in a web page use IP
addresses instead of hostnames? If DNS were unusable to the OP, he
wouldn't be doing e-mail or newsgroups. If the OP were having to use IP
addresses for everything, he would've mentioned it and maybe how he got
those IP addresses.

NOT ALWAYS. I'm old school. I use traditional, dedicated email, ftp,
usenet clients instead of a browser for all that. And those clients
work just fine even when my DNSes are not reachable which is very,
very rare. FWIW, Even when I enter the server names like
mail.mymailprovider.com in the configs, they still work without a
DNS. I think the client gets the IP and stores and uses it after
that. I never bothered to check and all have been working fine for
almost 5 years without any problems. With the usenet client I enter
the actual IP addresses. PS. Linux is my primary system and Internet
access. Windows runs in a VM on that machine for those times I need
it.


Here's a couple articles

https://www.lifewire.com/find-the-ip...eb-site-818155

Requires DNS be working.

Yes, but the article also includes some IPs for testing.

https://www.lifewire.com/what-is-the...-google-818153

Requires DNS be working.

Yes, but the article also includes some IPs for testing.

Also, if DNS was unusable, how would the OP get to the lifewire site?
You didn't give him the IP address for that site.

I was going to include it for testing purposes, but when I tested it
myself to be sure it worked, it didn't. Don't know why. Didn't check
why. either. Other IPs for the articles I tested did work though.


Stef