Public bug reported:

I am having issues loading certain websites such as linkedin.com and
portions of google sites including images.google.com, hotmail.com login,
etc. After looking through some logs and such I've determined that
resolved is not properly following CNAMEs to an IP address. Querying the
DNS server on my network directly for the info works fine. Loading the
sites from other computers on the network works fine.

In the #systemd IRC channel I was directed to the following two issues:
https://github.com/systemd/systemd/pull/18892
https://github.com/systemd/systemd/pull/19009

System info:
Ubuntu 20.10
ii  systemd        246.6-1ubuntu1.2 amd64        system and service manager
ii  linux-generic  5.8.0.48.53  amd64        Complete Generic Linux kernel and 
headers

Example:
[11:06:00]<root@castle:/var/log> host static-exp1.licdn.com
Host static-exp1.licdn.com not found: 2(SERVFAIL)
[11:06:17]<root@castle:/var/log> resolvectl status
Global
       LLMNR setting: no               
MulticastDNS setting: no               
  DNSOverTLS setting: no               
      DNSSEC setting: no               
    DNSSEC supported: no               
          DNS Domain: rhos.bigfiber.net
                      bigfiber.net     

Link 2 (enp6s0)
      Current Scopes: none
DefaultRoute setting: no  
       LLMNR setting: yes 
MulticastDNS setting: no  
  DNSOverTLS setting: no  
      DNSSEC setting: no  
    DNSSEC supported: no  

Link 3 (enp4s0f0)
      Current Scopes: DNS              
DefaultRoute setting: yes              
       LLMNR setting: yes              
MulticastDNS setting: no               
  DNSOverTLS setting: no               
      DNSSEC setting: no               
    DNSSEC supported: no               
  Current DNS Server: 10.18.1.1        
         DNS Servers: 10.18.1.1        
          DNS Domain: ~.               
                      rhos.bigfiber.net
                      bigfiber.net     

Link 4 (enp4s0f1)
      Current Scopes: none
DefaultRoute setting: no  
       LLMNR setting: yes 
MulticastDNS setting: no  
  DNSOverTLS setting: no  
      DNSSEC setting: no  
    DNSSEC supported: no  
[11:06:26]<root@castle:/var/log> host static-exp1.licdn.com 10.18.1.1
Using domain server:
Name: 10.18.1.1
Address: 10.18.1.1#53
Aliases: 

static-exp1.licdn.com is an alias for 2-01-2c3e-003d.cdx.cedexis.net.
2-01-2c3e-003d.cdx.cedexis.net is an alias for li-prod-static.azureedge.net.
li-prod-static.azureedge.net is an alias for li-prod-static.afd.azureedge.net.
li-prod-static.afd.azureedge.net is an alias for 
star-azureedge-prod.trafficmanager.net.
star-azureedge-prod.trafficmanager.net is an alias for dual.t-0009.t-msedge.net.
dual.t-0009.t-msedge.net is an alias for t-0009.t-msedge.net.
t-0009.t-msedge.net is an alias for Edge-Prod-WSTr3.ctrl.t-0009.t-msedge.net.
Edge-Prod-WSTr3.ctrl.t-0009.t-msedge.net is an alias for 
edge-prod-wstr3.ctrl.t-0001.trafficmanager.net.
edge-prod-wstr3.ctrl.t-0001.trafficmanager.net is an alias for 
standard.t-0009.t-msedge.net.
standard.t-0009.t-msedge.net has address 13.107.213.19
standard.t-0009.t-msedge.net has address 13.107.246.19
standard.t-0009.t-msedge.net has IPv6 address 2620:1ec:46::19
standard.t-0009.t-msedge.net has IPv6 address 2620:1ec:bdf::19


resolved debugging log is attached.

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "resolved debugging output"
   
https://bugs.launchpad.net/bugs/1921636/+attachment/5481641/+files/resolved.log

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https://bugs.launchpad.net/bugs/1921636

Title:
  resolved CNAME redirect issues

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