Suddenly, Swisscom's DNS servers can't resolve some addresses, for example, www.mcr-solutions.com or go.mcr-suite.com.
The command `nslookup go.mcr-suite.com` returns:
`Server: wireline-ig.cns.bluewin.org
Address: 193.5.23.23
*** wireline-ig.cns.bluewin.org could not find go.mcr-suite.com: Server failed`
However, querying the Google DNS server yields the correct response :
`nslookup go.mcr-suite.com 8.8.8.8
Server: dns.google
Address: 8.8.8.8
Non-authoritative response:
Name: go.mcr-suite.com
Address: 45.93.91.132`