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linux 下snmp安装与使用

安装snmp

确认snmp代理已安装

rpm -q net-snmp

如果未安装,安装snmp

yum install net-snmp


设置开机自动运行snmp

/sbin/chkconfig snmpd on配置snmp


修改配置文件

将原来的配置文件备份,编辑/etc/snmp/snmpd.conf,简单配置如下


# First, map the community name "public" into a "security name"


#       sec.name  source          community

com2sec notConfigUser  default       public


####

# Second, map the security name into a group name:


#       groupName      securityModel securityName

group   notConfigGroup v1           notConfigUser

group   notConfigGroup v2c           notConfigUser


####

# Third, create a view for us to let the group have rights to:


# Make at least  snmpwalk -v 1 localhost -c public system fast again.

#       name           incl/excl     subtree         mask(optional)

view    systemview    included   .1.3.6.1.2.1.1

view    systemview    included   .1.3.6.1.2.1.25.1.1


####

# Finally, grant the group read-only access to the systemview view.


#       group          context sec.model sec.level prefix read   write  notif

access  notConfigGroup ""      any       noauth    exact  systemview none none

启动snmp

/etc/init.d/snmpd start

如果已启动则重启snmp服务

/etc/init.d/snmpd restart


测试snmp

查看端口是否打开

netstat -ln | grep 161


安装snmp测试工具

yum install net-snmp-utils


本机测试snmp数据(修改monit为配置的团体名)

snmpwalk -v 2c -c public localhost system


snmpwalk -v3 -u username -l auth -a MD5 -A password localhost


创建SNMP(v3)用户


net-snmp-config --create-snmpv3-user -ro -a MD5 lyceemsnmp lyceem.com


远程测试snmp数据(修改ip为服务器ip,snmpwalk命令需要安装net-snmp)

snmpwalk -v 2c -c public ip system


故常处理

错误排除如果本地测试snmp有数据,远程测试snmp无数据则由于服务器防火墙禁止了外部访问服务器udp 161端口,则:

修改 /etc/sysconfig/iptables (或者:/etc/sysconfig/iptables-config ) ,增加如下规则:

-A RH-Firewall-1-INPUT -p udp -m state Cstate NEW -m udp Cdport 161 -j ACCEPT

重启iptables

/etc/init.d/iptables restart 


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linux 下snmp安装与使用