MRTG监控 ON RHEL6

(b) Fire your favorite web browser (like FireFox :D ) and type url http://www.your.com/mymrtg/ or http://your-ip/mymrtg/

(a) Login as a root user or login as a mrtg user and type following command:

# crontab -e

(b) Add mrtg cron job entry to configuration file (append following line to it):

*/5 * * * * /usr/bin/mrtg /etc/mrtg/mymrtg.cfg --logging /var/log/mrtg.log

Save file and you are done with MRTG config issues :)

You do not want to give access to everyone to your snmp server for security reasons. SNMP server uses UDP 161, 162 ports for communication. Use Linux IPTABLES firewall to restrict access to SNMP server

(a) Allow outgoing SNMP server request from your Linux computer. This is useful when you query remote host/router (replace SERVER IO with your real IP):

SERVER="xxx.xxx.xxx.xxx"

iptables -A OUTPUT -p udp -s $SERVER --sport 1024:65535 -d 0/0 --dport 161:162 -m state --state NEW,ESTABLISHED -j ACCEPT

iptables -A INPUT -p udp -s 0/0 --sport 161:162 -d $SERVER --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT

(b )Allow incoming SNMP client request via iptables. This is useful when you wish to accept queries for rest of the world (replace SERVER IP with your real IP):

SERVER="xxx.xxx.xxx.xxx"

iptables -A INPUT -p udp -s 0/0 --sport 1024:65535 -d $SERVER --dport 161:162 -m state --state NEW,ESTABLISHED -j ACCEPT

iptables -A OUTPUT -p udp -s $SERVER --sport 161:162 -d 0/0 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT

Pleae note that above two are just SNMP specific iptables rules. Please consult iptables(8) man page for complete information on iptables

Once again, you would like to restrict access to your MRTG reports. This can easily accomplished with Apache webserver''s .htaccess file. If you are on webhosting server with control panel (such as ensim or plesk) then you can use control panel itself to create password-protected directory.

Below is process outlined to protect graphs using apache''s .htaccess file and htpasswd command:

Step # 1: Create .htaccess file in /var/www/html/mymrtg/ directory (add text as follows):

vi /var/www/html/mymrtg/.htaccess

Add following text to file:

AuthName "MRTG Graphs/Html restricted access"

AuthType Basic

AuthUserFile /var/members/.htpasswd

require user mrtgadmin

Step # 2: Create a user and password name (-c assumes first time you are using .htpasswd file):

# htpasswd -c /var/members/.htpasswd mrtgadmin

For more information please see Apache Webserver Authentication and access control mini-howto.

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