3656591 - Issues while adding DataSphere subaccount to SAP Cloud Connector(SCC)

Upon adding a new DataSphere subaccount to SCC, following error is perceived from SCC trace (ljs_trace.log / scc_core.trc).

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20xx-xx-xx xx:xx:xx,xxx +0000#INFO#com.sap.core.connectivity.tunnel.client.handshake.ClientProtocolHandshaker#tunnel-client-17-3#          #Sending handshake request for tunnelId: account:///<subaccount ID here> and host: connectivitytunnel.ingress.dis-bcszs.di-us10.shoot.live.k8s-hana.ondemand.com:443

20xx-xx-xxx xx:xx:xx,xxx +0000#ERROR#com.sap.core.connectivity.tunnel.client.application.ApplicationClientConnectTask#Thread-20#          #Unexpected exception while establishing application tunnel connection for tunnelId: account:///<subaccount ID here>
io.netty.handler.ssl.SslHandshakeTimeoutException: handshake timed out after 10000ms
    at io.netty.handler.ssl.SslHandler$8.run(SslHandler.java:2277)
    at io.netty.util.concurrent.PromiseTask.runTask(PromiseTask.java:98)
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• SAP Cloud Connector(SCC) release independent;
• SAP Business Technology Platform;
• SAP Data Sphere.

SAP Cloud Connector, SCC, CC, cloud connector, JVM, firewall, proxy, squid, 3128, network, netmask, Region, BTP, IP address, IP, hosts, hanacloud.ondemand.com, k8s-hana.ondemand.com, ClientProtocolHandshaker, com.sap.core.connectivity.tunnel.client.handshake, Unexpected exception, io.netty.handler.ssl.SslHandshakeTimeoutException, handshake, hand shake,  , KBA , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , DS-DI-CON , Connections , Problem