原来的
[root@nhserver2_5 objects]# cd /usr/local/nagios/etc/objects
[root@nhserver2_5 objects]# vim commands.cfg
# 'check_http' command definition
define command{
        command_name    check_http
        command_line    $USER1$/check_http -I $HOSTADDRESS$ $ARG1$
        }
要修改为
define command{
        command_name    check_http
        command_line    $USER1$/check_http -H $HOSTADDRESS$ -p $ARG1$ -u $ARG2$
        }

[root@nhserver2_5 objects]# cd usr/local/nagios/etc/objects
[root@nhserver2_5 objects]# vim hosts_172.16.1.191.cfg
define host{
        use                     windows-server
        host_name               172.16.1.191
        alias                   172.16.1.191
        address                 172.16.1.191
        }

define hostgroup{
        hostgroup_name  windows-servers
        alias           Windows Servers
        }

define service{
        use                     local-service
        host_name               172.16.1.191
        service_description     check-host-alive
        check_command           check-host-alive
        max_check_attempts      5
        normal_check_interval   3
        retry_check_interval    2
        check_period            24x7
        notification_interval   10
        notification_period     24x7
        }

define service{
        use                     local-service
        host_name               172.16.1.191
        service_description     172.16.1.191:9000/gx/login.jsp
        check_command           check_http!9000!"/gx/login.jsp"
        max_check_attempts      5
        normal_check_interval   3
        retry_check_interval    2
        check_period            24x7
        notification_interval   10
        notification_period     24x7
        }

[root@nhserver2_5 objects]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
[root@nhserver2_5 objects]# service nagios reload

测试
[root@nhserver2_5 libexec]# ./check_http -I 172.16.1.191 -p 9000 -u "/gx/login.jsp"  
HTTP OK: HTTP/1.1 200 OK - 1438 bytes in 0.003 second response time |time=0.003178s;;;0.000000 size=1438B;;;0

[root@nhserver2_5 libexec]# ./check_http -I 172.16.1.191 -p 9000 -u "/gxx/login.jsp"
HTTP WARNING: HTTP/1.1 400 No Host matches server name skylink-3488y1g - 143 bytes in 0.002 second response time |time=0.002433s;;;0.000000 size=143B;;;0

-----------------------------------------------------------

过一会，就能在nagios的services中看到172.16.1.191:9000/gx/login.jsp这个地址能正常访问了。
172.16.1.191
172.16.1.191:9000/gx/login.jsp    
    OK     04-17-2014 21:05:21     0d 0h 0m 49s     1/5     HTTP OK: HTTP/1.1 200 OK - 1438 bytes in 0.016 second response time     
check-host-alive
    OK     04-17-2014 21:04:19     0d 0h 1m 51s     1/5     PING OK - Packet loss = 0%, RTA = 0.49 ms

改动一下地址172.16.1.191:9000/gxx/login.jsp(为gxx)，看结果如何：提示没有找到合适的地址，结果正确。
172.16.1.191    
172.16.1.191:9000/gxx/login.jsp    
    WARNING     04-17-2014 21:09:04     0d 0h 1m 9s     1/5     HTTP WARNING: HTTP/1.1 400 No Host matches server name 172.16.1.191 - 139 bytes in 0.002

second response time     
check-host-alive    
    PENDING     N/A     0d 0h 2m 9s+     1/5     Service check scheduled for Thu Apr 17 21:10:04 CST 2014

=============================================================================
自定义一个check_http_nh命令来做：

[root@nhserver2_5 objects]# cd /usr/local/nagios/etc/objects
define command{
        command_name    check_http
        command_line    $USER1$/check_http -I $HOSTADDRESS$ $ARG1$
        #command_line    $USER1$/check_http -H $HOSTADDRESS$ -p $ARG1$ -u $ARG2$
        }
#加入一个自定义的命令
define command{
        command_name    check_http_nh
        #command_line    $USER1$/check_http -I $HOSTADDRESS$ $ARG1$
        command_line    $USER1$/check_http_nh -H $HOSTADDRESS$ -p $ARG1$ -u $ARG2$
        }

[root@nhserver2_5 libexec]# cd /usr/local/nagios/libexec
[root@nhserver2_5 libexec]# cp check_http check_http_nh
[root@nhserver2_5 libexec]# chown nagios.nagios check_http_nh

[root@nhserver2_5 objects]# cd /usr/local/nagios/etc/objects
[root@nhserver2_5 objects]# vim hosts_172.16.1.191.cfg
define host{
        use                     windows-server
        host_name               172.16.1.191
        alias                   172.16.1.191
        address                 172.16.1.191
        }

define hostgroup{
        hostgroup_name  windows-servers
        alias           Windows Servers
        }

define service{
        use                     local-service
        host_name               172.16.1.191
        service_description     check-host-alive
        check_command           check-host-alive
        max_check_attempts      5
        normal_check_interval   3
        retry_check_interval    2
        check_period            24x7
        notification_interval   10
        notification_period     24x7
        }

define service{
        use                     local-service
        host_name               172.16.1.191
        service_description     172.16.1.191:9000/gx/login.jsp
        check_command           check_http_nh!9000!"/gx/login.jsp"   #改为自定义的命令来检测
        max_check_attempts      5
        normal_check_interval   3
        retry_check_interval    2
        check_period            24x7
        notification_interval   10
        notification_period     24x7
        }

[root@nhserver2_5 libexec]# cd /usr/local/nagios/libexec
[root@nhserver2_5 libexec]# ./check_http_nh -I 172.16.1.191 -p 9000 -u "/gx/login.jsp"
HTTP OK: HTTP/1.1 200 OK - 1438 bytes in 0.020 second response time |time=0.019584s;;;0.000000 size=1438B;;;0

[root@nhserver2_5 objects]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
[root@nhserver2_5 objects]# service nagios reload

过一会儿，就能看到nagios中的service的状态正常了：
172.16.1.191
172.16.1.191:9000/gx/login.jsp    
    OK     04-17-2014 21:46:20     0d 0h 1m 1s     1/5     HTTP OK: HTTP/1.1 200 OK - 1438 bytes in 0.009 second response time     
check-host-alive    
    OK     04-17-2014 21:45:20     0d 0h 2m 1s     1/5     PING OK - Packet loss = 0%, RTA = 0.97 ms