When multiple RSH connections are established in rapid succession, they sometimes freeze and the error "do_ypcall: clnt_call: RPC: Timed" appears in the logs. What is causing the errors, and how can I work around this issue ?

Some hardware platforms, such as IBM Bladecenters, implement the ASF Remote Management and Control Protocol in their firmware. This protocol uses TCP and UDP port 623. RPC services, such as RSH, use random ports between 600 and 699 to establish communication between client and server. If the client sends out a request on port 623, which is likely to happen at some point, the reply to that requ...