[IBMCloud] fail to ssh to master/bootstrap/worker nodes from the bastion inside a customer vpc.

install discnnect private cluster, ssh to master/bootstrap nodes from the bastion on the vpc failed.

Pre-merge build https://github.com/openshift/installer/pull/6836
registry.build05.ci.openshift.org/ci-ln-5g4sj02/release:latest
Tag: 4.13.0-0.ci.test-2023-02-27-033047-ci-ln-5g4sj02-latest

always

1.Create bastion instance maxu-ibmj-p1-int-svc 
2.Create vpc on the bastion host 
3.Install private disconnect cluster on the bastion host with mirror registry 
4.ssh to the bastion  
5.ssh to the master/bootstrap nodes from the bastion 

[core@maxu-ibmj-p1-int-svc ~]$ ssh -i ~/openshift-qe.pem core@10.241.0.5 -v
OpenSSH_8.8p1, OpenSSL 3.0.5 5 Jul 2022
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: configuration requests final Match pass
debug1: re-parsing configuration
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: Connecting to 10.241.0.5 [10.241.0.5] port 22.
debug1: connect to address 10.241.0.5 port 22: Connection timed out
ssh: connect to host 10.241.0.5 port 22: Connection timed out

ssh succeed.

$ibmcloud is sg-rules r014-5a6c16f4-8a4c-4c02-ab2d-626c14f72a77 --vpc maxu-ibmj-p1-vpc
Listing rules of security group r014-5a6c16f4-8a4c-4c02-ab2d-626c14f72a77 under account OpenShift-QE as user ServiceId-dff277a9-b608-410a-ad24-c544e59e3778...
ID                                          Direction   IP version   Protocol                      Remote   
r014-6739d68f-6827-41f4-b51a-5da742c353b2   outbound    ipv4         all                           0.0.0.0/0   
r014-06d44c15-d3fd-4a14-96c4-13e96aa6769c   inbound     ipv4         all                           shakiness-perfectly-rundown-take   r014-25b86956-5370-4925-adaf-89dfca9fb44b   inbound     ipv4         tcp Ports:Min=22,Max=22       0.0.0.0/0   
r014-e18f0f5e-c4e5-44a5-b180-7a84aa59fa97   inbound     ipv4         tcp Ports:Min=3128,Max=3129   0.0.0.0/0   
r014-7e79c4b7-d0bb-4fab-9f5d-d03f6b427d89   inbound     ipv4         icmp Type=8,Code=0            0.0.0.0/0   
r014-03f23b04-c67a-463d-9754-895b8e474e75   inbound     ipv4         tcp Ports:Min=5000,Max=5000   0.0.0.0/0   
r014-8febe8c8-c937-42b6-b352-8ae471749321   inbound     ipv4         tcp Ports:Min=6001,Max=6002   0.0.0.0/0