How to Fix Problems in Cacti

No graph display, SNMP agent is not installed
This has been discussed in previous posts, and see also how to install SNMP Agent in previous post, http://myconfigure.blogspot.com/2013/06/how-to-install-snmp-agent.html. 

Error    : Can't find file: 'poller_output'

Graph display does not appear, besides the lack of SNMP Agent, it could be due to a full hard drive. Check disk space by using the command

How to Install SNMP Agent

There are a lot of questions, "why Cacti that has been installed in my Windows, not working ?", why no graph display?. The reason is you do not have the SNMP agent in each device that you want to monitor. This is the explanation, it's not details but I hope it makes you understand.

How to make Squid 3.3.5 as Transparent Proxy Https / Ssl in Centos 6.4

The experiment continues to make transparent proxy https / ssl. Same as previous post. Look at "How to make Squid 3.1.23 as Tproxy (Transparent Proxy) in Centos 6.4". Do the step 1 and 2, ie install shorewall and install dhcp server. Then continue with the next steps.

How to make Squid 3.1.23 as Tproxy (Transparent Proxy) in Centos 6.4

From the title, we will only make squid tproxy (transparent proxy), but there are actually 3 work to be done.

1. Configuration of the firewall / shorewall so Linux Centos  will become a router.

2. Make dhcp server, and

3. Install squid as tproxy ( I use squid version 3.1.23 ).

We will work on gradually, so you can easily fix it if there is an error.