centos里启用snmp的监控

yum install net-snmp net-snmp-devel -y

/etc/init.d/snmpd stop

net-snmp-config –create-snmpv3-user -ro -A 密码 -a MD5 用户名

/etc/init.d/snmpd start

密码要超过8位

[root@zhudoubaby ~]# net-snmp-config --create-snmpv3-user -ro
Enter a SNMPv3 user name to create:
test
Enter authentication pass-phrase:
net-snmp-config
Enter encryption pass-phrase:
[press return to reuse the authentication pass-phrase]
net-snmp-config
adding the following line to /var/net-snmp/snmpd.conf:
createUser zhudou MD5 "netsnmp$#config" DES netsnmp$#config
adding the following line to /etc/snmp/snmpd.conf:
rouser test
[root@zhudoubaby ~]# service snmpd start

有防火墙的情况下，得把udp 161 端口打开了

[root@zhudoubaby ~]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
RH-Firewall-1-INPUT all -- anywhere anywhere

Chain FORWARD (policy ACCEPT)
target prot opt source destination
RH-Firewall-1-INPUT all -- anywhere anywhere

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Chain RH-Firewall-1-INPUT (2 references)
target prot opt source destination

ACCEPT udp -- anywhere anywhere state NEW udp dpt:snmp （必须的）
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:smtp （不用）

/etc/sysconfig/iptables