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nmtrapd !!!nmtrapd NAME SYNOPSIS DESCRIPTION PROTOCOL SEE ALSO AUTHORS ---- !!NAME nmtrapd - A network management SNMP trap multiplexer. !!SYNOPSIS __nmtrapd__ [[ ''port'' ] ________________________________________________________________________________________________________________________________________ !!DESCRIPTION The __nmtrapd__ trap daemon listens on the snmp-trap port (usually port 162/udp) for incoming SNMP trap or inform messages and forwards them to all connected clients (like __scotty__). The optional ''port'' argument allows to use the nmtrapd daemon to forward messages received on a non standard SNMP trap port. Port numbers below 1024 will be rejected with the exception of the snmp-trap port 162/udp. The __nmtrapd__ daemon must be installed setuid root since UNIX systems require root permissions to open the standard SNMP trap port 162/udp. The __nmtrapd__ daemon rejects all ''port'' numbers below 1024 with the exception of port 162/udp in order to protect the system security. Clients connect to the __nmtrapd__ daemon by opening the AF_UNIX domain stream socket /tmp/.nmtrapd-''port''. Thus, the default AF_UNIX domain stream socket is named /tmp/.nmtrapd-162. !!PROTOCOL Received messages are forwarded using the following packet format: 0 7 8 15 16 23 24 32 +--------+--------+--------+--------+ | version| unused | port number | +--------+--------+--------+--------+ | IPv4 address of the sender | +--------+--------+--------+--------+ | length of the trap message | +--------+--------+--------+--------+ | trap message | : : : : : +--------+--------+--------+--------+ The value of the version field is 0 and all the unused bits are set to 0. The port number and the length of the trap message are returned in network byte order. !!SEE ALSO scotty(1), tkined(1), Tnm(n) !!AUTHORS Erik Schoenfelder Juergen Schoenwaelder ----
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