mt lsepoch -actual won't work through firewalls, one can enable remote hosts replica monitoring with the help of the repoch script.
repoch script running on the remote host creates a replica monitoring report containing the current epoch number of the replicas hosted on that site and sends the report to the other site by creating MultiSite shipping order for it.
The setup on the client site includes the following steps:
/var/adm/rational/clearcase/scheduler/tasksdirectory (make sure it has execution permission for everyone)
/var/adm/rational/clearcase/scheduler/tasks/task_registryand add the following to the end of it:
Task.Begin Task.Id: 102 Task.Name: "Replica monitoring" Task.Pathname: ...