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Merion Mertics , ,

CRM

2

, ( NFS , ) Linux , portmapper .

, , : portmapper DDoS-.

, portmapper .


, portmapper

Linux, RPC (Remote Procedure Call), NFS - , . , portmapper 111 (TCP UDP).

RPC (Remote Procedure Call) - . , ,

RPC

. RPC - rpcinfo. :

[root@merionet ~]# rpcinfo -p
   program vers proto   port  service
    100000    4   tcp    111  portmapper
    100000    3   tcp    111  portmapper
    100000    2   tcp    111  portmapper
    100000    4   udp    111  portmapper
    100000    3   udp    111  portmapper
    100000    2   udp    111  portmapper
rpcinfo -p

portmapper. .


portmapper in CentOS 7

, portmapper rpcbind. , :

systemctl stop rpcbind
[root@merionet ~]# systemctl stop rpcbind
Warning: Stopping rpcbind.service, but it can still be activated by:
  rpcbind.socket
[root@merionet ~]# systemctl stop rpcbind.socket

portmapper,

, :

[root@merionet ~]# systemctl disable rpcbind

. , rpc ( )

[root@merionet ~]# rpcinfo -p
rpcinfo: can't contact portmapper: RPC: Remote system error - Connection refused

. , .