I've installed Munin on CentOS, in Munin directory, it only has a few files and I could not see the website data. The Munin log shows the connection to 127.0.0.1 was refused. I have tried to disable iptables and it gives the same error.
Error log
2011/05/06 15:30:01 Opened log file
2011/05/06 15:30:01 [INFO]: Starting munin-update
2011/05/06 15:30:02 Failed to connect to node 127.0.0.1:4949/tcp : Connection refused
2011/05/06 15:30:02 [ERROR] Munin::Master::UpdateWorker failed to connect to node
2011/05/06 15:30:02 [INFO] Reaping Munin::Master::UpdateWorker. Exit value/signal: 20/0
2011/05/06 15:30:02 [INFO] No old data available for failed worker localhost;localhost. This node will disappear from the html web page hierarchy
2011/05/06 15:30:02 [INFO]: Munin-update finished (0.02 sec)
Munin directory
-rw-r--r-- 1 munin munin 2.5K May 6 15:05 definitions.html
-rw-r--r-- 1 munin munin 2.0K May 6 15:05 favicon.ico
-rw-r--r-- 1 munin munin 1.8K May 6 15:05 logo-h.png
-rw-r--r-- 1 munin munin 473 May 6 15:05 logo.png
-rw-r--r-- 1 munin munin 5.3K May 6 15:05 style.css