tyt13fi.htm

一个学习tcp/ip协议的教程

4  SuperGateway.com (130.12.14.2)    75ms   13ms  10ms

5  black.cat.com  (122.13.2.12)      45ms   4ms   6ms</FONT></PRE><P>When dealing with RPC, a utility called rpcinfo can determine which RPC services are currently active on the local or any remote system that supports RPC. The options supported by rpcinfo vary with the implementation, but all enable flags to decide which type of service to check. For example, the -p option displays the local portmapper. The following example shows the options supported on the SCO UNIX version of rpcinfo, as well as the output for the portmapper:<BR><PRE>

<FONT COLOR=#000080>$ rpcinfo

Usage: rpcinfo [ -n portnum ] -u host prognum [ versnum ]

       rpcinfo [ -n portnum ] -t host prognum [ versnum ]

       rpcinfo -p [ host ]

       rpcinfo -b prognum versnum

$ rpcinfo -p

   program vers proto   port

    100000    2   tcp    111  portmapper

    100000    2   udp    111  portmapper

    150001    1   udp   1026  pcnfsd

    150001    2   udp   1026  pcnfsd

    100008    1   udp   1027  walld

    100002    1   udp   1028  rusersd

    100002    2   udp   1028  rusersd

    100024    1   udp   1029  status

    100024    1   tcp   1024  status

    100020    1   udp   1034  llockmgr

    100020    1   tcp   1025  llockmgr

    100021    2   tcp   1026  nlockmgr

    100021    1   tcp   1027  nlockmgr

    100021    1   udp   1038  nlockmgr

    100021    3   tcp   1028  nlockmgr