【转】Why does my NFS client connect on TCP ports less than 1024?

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Why does my NFS client connect on TCP ports less than 1024?

 SOLUTION 已验证 - 已更新 2013年十一月19日04:05 - 

English 

环境

• Red Hat Enterprise Linux
• NFS

问题

• Why do NFS clients connect on TCP ports less than 1024?

决议

• An NFS client will bind to a TCP port below 1024 for security reasons. These are privileged ports that require root access to bind to.
• It is expected behavior for NFS to ignore the TCP port range specified by the sysctl net.ipv4.ip_local_port_range.

根源

• TCP ports less than 1024 are considered "privileged ports." Any process can open ports greater than 1024, ports greater than 1024 are therefore considered insecure. Only root is able to open ports less than 1024.