NPM not installing package. Hostname/IP address doesn't match certificate's altnames:

Question

For a solution, see below

It was working yesterday, but I don\'t know what happened to it.

NPM is not installing the package. The hostname/IP addr

Answer 1

npmjs has a DNS problem according to its incident report: DNS misconfiguration cached in ISP DNS caches.

To solve your problem, do this:

1. dig www.npmjs.com @1.1.1.1

   Sample output on Linux

   ; <<>> DiG 9.10.3-P4-Ubuntu <<>> www.npmjs.com @1.1.1.1
   ;; global options: +cmd
   ;; Got answer:
   ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50308
   ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
   
   ;; OPT PSEUDOSECTION:
   ; EDNS: version: 0, flags:; udp: 1452
   ;; QUESTION SECTION:
   ;www.npmjs.com.                 IN      A
   
   ;; ANSWER SECTION:
   www.npmjs.com.          128     IN      CNAME   www.npmjs.com.cdn.cloudflare.net.
   www.npmjs.com.cdn.cloudflare.net. 151 IN A      104.16.109.30
   www.npmjs.com.cdn.cloudflare.net. 151 IN A      104.16.110.30
   
   ;; Query time: 2 msec
   ;; SERVER: 1.1.1.1#53(1.1.1.1)
   ;; WHEN: Sat Sep 01 14:05:56 UTC 2018
   ;; MSG SIZE  rcvd: 120
   

   2. Get resolved IP address: 104.16.109.30 in my case

   3. Add new entry in your /etc/hosts file

      echo "104.16.110.30 www.npmjs.com registry.npmjs.org" >> /etc/hosts

   Do not forget to remove this line at the end of the weekend.