Strange Internet problem after update

[minkwe]

After a recent update and reboot, I can no longer access the internet.

Typing www.google.com in firefox or elinks results in firefox/links complaining about the server not found. However, I can find the server by using dig on the command line. I have checked the DNS configuration in resolve.conf and it is exactly the same as on a RHEL 5 system connects fine. The strange thing is, I can connect to other local machines in my domain just fine but can not connect to any other machine ont he internet on this one Fedora 12 host even though I can on all other machines!

Help!

[Nokia]

Try this

su -
* echo "nameserver 208.67.222.222" | tee -a /etc/resolv.conf
* yum update --enablerepo=u*g
* reboot

---------- Post added at 07:53 PM CST ---------- Previous post was at 07:50 PM CST ----------

P.S. Upon editing a typo, a * appears before each command --on my box at least. Ignore it.

[egstern]

[QUOTE=Nokia;1336831]Try this

su -
* echo "nameserver 208.67.222.222" | tee -a /etc/resolv.conf
* yum update --enablerepo=u*g
* reboot

[COLOR="Silver"]

---------- Post added at 07:53 PM CST ---------- Previous post was at 07:50 PM CST ----------

Would you care to explain what you're you are trying to accomplish with this, such as what is supposed to be updated?

This sounds a lot like my problem: http://forums.fedoraforum.org/showthread.php?t=241450

egstern

[Nokia]

1. I missed the DNS statement of the OP
2. This is in testing repo*
http://admin.fedoraproject.org/updat...t20100202.fc11

[jpollard]

Check your /etc/nsswitch.conf file.

Dig goes directly to DNS, and bypasses host table lookup (gethostbyname...) as
I remember it....

/etc/nsswitch.conf is used to control how gethostbyname (and other library calls)
use the /etc/host file and/or DNS.

The entry for host lookups on my system is:
hosts: files dns

which means it first looks in the /etc/host file, then references DNS.

[Nokia]

Originally Posted by jpollard

Check your /etc/nsswitch.conf file.

Dig goes directly to DNS, and bypasses host table lookup (gethostbyname...) as
I remember it....

/etc/nsswitch.conf is used to control how gethostbyname (and other library calls)
use the /etc/host file and/or DNS.

The entry for host lookups on my system is:
hosts: files dns

which means it first looks in the /etc/host file, then references DNS.

So mine is...somewhat "dead" before querying the DNS ?*

hosts:      files mdns4_minimal [NOTFOUND=return] dns

[arirushan]

Same problem here.

I can ping to google.com but all service required internet connection is not working.
if I open chrome and I type google.com in the address bar this is what I got:

Error 105 (net::ERR_NAME_NOT_RESOLVED): The server could not be found.

Fortunatelly I have virtualbox installed and connection from winXP inside VBox working just fine.

but how can I fix this because yum update also not working now.

Please somebody help.

[scott32746]

Hello,
Maybe your gateway is missing
# netstat -rn
Check /etc/resolv.conf for
nameserver 8.8.8.8 --> google
search xxx.com
domain xxx.com

[jpollard]

Originally Posted by Nokia

So mine is...somewhat "dead" before querying the DNS ?*

hosts:      files mdns4_minimal [NOTFOUND=return] dns

Try putting the "dns" in front of "mdns4_minimal..."

[Nokia]

Originally Posted by jpollard

Try putting the "dns" in front of "mdns4_minimal..."

I was trying to say that my connection works in spite of the strange default settings. Wondered how is this possible.

[jpollard]

Originally Posted by Nokia

I was trying to say that my connection works in spite of the strange default settings. Wondered how is this possible.

Oh. sorry for the confusion.

It depends on what the mdns4_minimal plugin returns. The way I interpret
"NOTFOUND=return" is as follows (from http://www.unixguide.net/sun/faq/4.03.shtml)

Briefly, [NOTFOUND=return] means
that the name service whose entry it follows should be
considered authoritative (so that if it's up and it says such a
name doesn't exist, believe it and return instead of continuing
to hunt for an answer).

If mdns4_minimal isn't up, then try DNS. Now, I did a brief search for
what "mdns4_minimal" was used for and didn't find anything.

[Nokia]

Originally Posted by jpollard

Oh. sorry for the confusion.

It depends on what the mdns4_minimal plugin returns. The way I interpret
"NOTFOUND=return" is as follows (from http://www.unixguide.net/sun/faq/4.03.shtml)



If mdns4_minimal isn't up, then try DNS. Now, I did a brief search for
what "mdns4_minimal" was used for and didn't find anything.

See

less /usr/share/doc/nss-mdns-0.10/README

I'm still puzzled though. I'm trying to fine a reasonable argument for this package to be installed/running along dhclient.