Linux mrtg configure how to
作者 佚名技术
来源 Linux系统
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发布时间 2012-05-17
| Linux mrtg configure how to Step # 1 : Make sure snmp server installed Please note that snmpd configuration does not require using mrtg with remote network devices such as Routers and switches. If you just want mrtg graphs for router or switch then please refer to step # 4 (as all these devices comes preconfigured with snmpd software). Run rpm commands query option to find out snmp server installed or not: # rpm -qa | grep snmp If snmp installed then please refer step # 2; otherwise snmp server and utils were not present and your need to install them using following steps (login as a root user): (a) Visit rpmfind.net to get snmp server and utilities rpms. If you are fedora user then use yum command as follows to install it: # yum install net-snmp-utils net-snmp (b) If you are RHEL subscriber then use up2date command as follows to install: #up2date -v -i net-snmp-utils net-snmp Step # 2 : Determine if snmp server is running or not Run ''ps'' command to see if snmp server is running or not: # ps -aux | grep snmp Output: root 5512 0.0 2.3 5872 3012 pts/0 S 22:04 0:00 /usr/sbin/snmpd Alternatively, you can try any of the following two commands as well: # lsof -i :199 Output: COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME snmpd 5512 root 4u IPv4 34432 TCP *:smux (LISTEN) or try out netstat command: # netstat -natv | grep '':199'' Output: tcp 0 0 0.0.0.0:199 0.0.0.0:* LISTEN If you found service is running or listing on port 199 then please see step #3; otherwise start service using following command: # service snmpd start Make sure snmpd service starts automatically, when linux comes us (add snmpd service): # chkconfig --add snmpd Step # 3 : Make sure snmp server configured properly Run snmpwalk utility to request for tree of information about network entity. In simple words query snmp server for your IP address (assigned to eth0, eth1, lo etc):
# snmpwalk -v 1 -c public localhost IP-MIB::ipAdEntIfIndex ip.ipAddrTable.ipAddrEntry.ipAdEntIfIndex.127.0.0.1 = 1 ip.ipAddrTable.ipAddrEntry.ipAdEntIfIndex.192.168.0.3 = 2 If you can see your IP address then please proceed to step 4; else it is a time to configure snmp server as follows (by default RHEL and RH 8/9 are not configured for snmp server for security reason): Configure SNMP (1) Edit file /etc/snmp/snmpd.conf using text editor: # vi /etc/snmp/snmpd.conf Change/Modify line(s) as follows: Find following Line: com2sec notConfigUser default public Replace with (make sure you replace 192.168.0.0/24 replace with your network IPs) following lines: com2sec local localhost public com2sec mynetwork 192.168.0.0/24 public Scroll down bit and change: Find Lines: group notConfigGroup v1 notConfigUser group notConfigGroup v2c notConfigUser Replace with: group MyRWGroup v1 local group MyRWGroup v2c local group MyRWGroup usm local group MyROGroup v1 mynetwork group MyROGroup v2c mynetwork |
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