Unable to access terminal from CDSW session

Hi,

Would appreciate any advice, how to solve a problem with terminal access from a CDSW session. Let me highlight that I can launch a session, however within a session I am unable to access the terminal – please see the attached screenshot with HTTP ERROR 401.

The networking requirements are met, in particular:

• IPv6 is enabled
• CDSW hosts are within the same subnet as the CDH cluster
• DNS is configured with the relevant A record for domain name, CNAME record for wildcard domain, and a reverse PTR domain record (please see the enclosed response to ping command, where the DNS resolves the terminal's FQDN to CDSW master node's IP)
• No iptables rules were enabled
• SElinux is disabled

[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