Portmap

Portmap is a software Demon under Unix/Linux which converts the numbers of programs RPC into numbers of software port DARPA.

Its initial goal was to limit the number of ports used, but it had little success and is more used only for

NFS (file-sharing)
FAM (monitor of modification of file)
NIS, software of Annuaire become practically obsolete).

History

The first version of this software was used with BSD 4.3.

Example of list of ports RPC

The following list shows the various programs and their version and which ports they use.

For example, it shows that demons NFS of 2 versions different (V2 and V3) are in the course of execution and can be reached via the ports TCP 2049 or UDP port 2049.

$ rpcinfo - p program towards proto port 100000 2 TCP 111 portmapper 100000 2 UDP 111 portmapper 100003 2 UDP 2049 NFS 100003 3 UDP 2049 NFS 100003 4 UDP 2049 NFS 100003 2 TCP 2049 NFS 100003 3 TCP 2049 NFS 100003 4 TCP 2049 NFS 100024 1 UDP 32770 status 100021 1 UDP 32770 nlockmgr 100021 3 UDP 32770 nlockmgr 100021 4 UDP 32770 nlockmgr 100024 1 TCP 32769 status 100021 1 TCP 32769 nlockmgr 100021 3 TCP 32769 nlockmgr 100021 4 TCP 32769 nlockmgr 100005 1 UDP 644 mountd 100005 1 TCP 645 mountd 100005 2 UDP 644 mountd 100005 2 TCP 645 mountd 100005 3 UDP 644 mountd 100005 3 TCP 645 mountd

See too

TCP Wrapper
RFC 1833 Binding Protocols for ONC RPC Version 2
and

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