question Re: Unable to access HDFS from CDSW session in Support Questions

question Re: Unable to access HDFS from CDSW session in Support Questions https://community.cloudera.com/t5/Support-Questions/Unable-to-access-HDFS-from-CDSW-session/m-p/298618#M219275 I do confirm that the CDSW hosts meet all the networking requirements, in particular:<UL><LI>IPv6 is enabled</LI><LI>CDSW hosts are within the same subnet as the CDH cluster</LI><LI>DNS is configured with the relevant A record for domain name, CNAME record for wildcard domain, and a reverse PTR domain record</LI><LI>No iptables rules were enabled</LI><LI>SElinux is disabled</LI></UL>Let me also clarify – I can launch a session, however within a session I am unable to access the HDFS, from input prompt (as in my first post) nor any script.Example DNS lookup commands from a session's input prompt:   <LI-CODE lang="markup">!nslookup *.cdsw.<intranetdomain> Server: 100.77.0.10 Address: 100.77.0.10#53 Non-authoritative answer: *.cdsw.<intranetdomain> canonical name = cdsw.<intranetdomain>. Name: cdsw.<intranetdomain> Address: 10.133.210.200 !dig -x 10.133.210.200 ; <<>> DiG 9.11.3-1ubuntu1.11-Ubuntu <<>> -x 10.133.210.200 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60863 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;200.210.133.10.in-addr.arpa. IN PTR ;; ANSWER SECTION: 200.210.133.10.in-addr.arpa. 300 IN PTR cdsw.<intranetdomain>. ;; Query time: 307 msec ;; SERVER: 100.77.0.10#53(100.77.0.10) ;; WHEN: Thu Jun 25 08:05:22 UTC 2020 ;; MSG SIZE rcvd: 93</LI-CODE>    I have also noticed that I am unable to access a terminal – web browser returns HTTP ERROR 401. Though DNS resolves the terminal's FQDN to CDSW master node's IP.<img src="https://community.cloudera.com/t5/image/serverpage/image-id/28081i06B81466B2EB48E8/image-size/large?v=v2&px=999" role="button" title="CDSW_terminal_1.png" alt="CDSW_terminal_1.png" /> <LI-CODE lang="markup">[cloud-user@cdh-control-01 ~]$ ping -c1 tty-jidv65sd8630btx4.cdsw.<intranetdomain> PING cdsw.<intranetdomain> (10.133.210.200) 56(84) bytes of data. 64 bytes from cdsw.<intranetdomain> (10.133.210.200): icmp_seq=1 ttl=60 time=0.884 ms --- cdsw.<intranetdomain> ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.884/0.884/0.884/0.000 ms</LI-CODE>     Thu, 25 Jun 2020 16:38:03 GMT Marek 2020-06-25T16:38:03Z