服务端(192.168.2.110)无法访问客户端的NRPE: 

[root@node1 ~]# /usr/local/nagios/libexec/check_nrpe -H 127.0.0.1

NRPE v2.12

[root@node1 ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.2.120

Connection refused by host

客户端(192.168.2.120)：

[root@node120 etc]# lsof -i :5666

COMMAND   PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME

nrpe    18703 nagios    4u  IPv4  85766      0t0  TCP localhost:5666 (LISTEN)#只在本地有效，所有外部的IP无法访问

[root@node120 etc]# vim nrpe.conf +44

将以下内容注释掉：

#server_address=127.0.0.1

[root@node120 etc]# pkill nrpe

[root@node120 etc]# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

[root@node120 etc]# lsof -i :5666

COMMAND   PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME

nrpe    18766 nagios    4u  IPv4  89670      0t0  TCP *:5666 (LISTEN)

这个就可以正常访问了

服务端访问：

[root@node1 etc]# /usr/local/nagios/libexec/check_nrpe -H 192.168.2.120 -c check_iostat

IOSTAT OK - user 0.28 nice 0.00 sys 0.30 iowait 0.31 idle 0.00  | iowait=0.31%;; idle=0.00%;; user=0.28%;; nice=0.00%;; sys=0.30%;;

本文出自 “阮胜昌的技术博客” 博客，谢绝转载！

nagios Connection refused by host