Re: Don't update to the latest f33!

Stephen John Smoogen <smooge@xxxxxxxxx> · Mon, 15 Feb 2021 18:00:57 -0500

On Mon, 15 Feb 2021 at 17:39, Steve Dickson <SteveD@xxxxxxxxxx> wrote:
Hello,

I just updated to latest Fedora 33 and 

I no longer have any DNS name solution. 

The network is up... but... 

$ ping www.yahoo.com

ping: www.yahoo.com: Name or service not known

I changed nothing! 

How would be the bet way to debug this???

It could be all kinds of things.. I updated this morning and still have DNS so not sure which.

1. what does /etc/resolv.conf say? Mine is pretty default but there are different ways this could be happening:
[ssmoogen@localhost freenode-znc]$ cat /etc/resolv.conf
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs should typically not access this file directly, but only
# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
# different way, replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0 trust-ad
search redhat.com southeast.rr.com

 2. what does systemd-resolv say
[ssmoogen@localhost freenode-znc]$ systemd-resolve www.yahoo.com
www.yahoo.com: 74.6.143.25                     -- link: ens1u2u1u2
               74.6.143.26                     -- link: ens1u2u1u2
               2001:4998:124:1507::f001        -- link: ens1u2u1u2
               2001:4998:124:1507::f000        -- link: ens1u2u1u2
               (new-fp-shed.wg1.b.yahoo.com)

-- Information acquired via protocol DNS in 1.5ms.
-- Data is authenticated: no

3. again if you are set up with systemd-resolv does it show up as broken in systemctl or 
[root@localhost ~]# ss -npl| grep systemd-resolv
u_dgr UNCONN 0      0                                                                            * 39594                  * 16930    users:(("systemd-resolve",pid=7472,fd=3))                

udp   UNCONN 0      0                                                                127.0.0.53%lo:53               0.0.0.0:*        users:(("systemd-resolve",pid=7472,fd=16))               

udp   UNCONN 0      0                                                                      0.0.0.0:5355             0.0.0.0:*        users:(("systemd-resolve",pid=7472,fd=11))               

udp   UNCONN 0      0                                                                         [::]:5355                [::]:*        users:(("systemd-resolve",pid=7472,fd=13))               

tcp   LISTEN 0      4096                                                                   0.0.0.0:5355             0.0.0.0:*        users:(("systemd-resolve",pid=7472,fd=12))               

tcp   LISTEN 0      4096                                                             127.0.0.53%lo:53               0.0.0.0:*        users:(("systemd-resolve",pid=7472,fd=17))               

tcp   LISTEN 0      4096                                                                      [::]:5355                [::]:*        users:(("systemd-resolve",pid=7472,fd=14))               

-- 
Stephen J Smoogen.

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