Hy Everybody I've run into a strange Problem with munin for which i didnt find any solution... maybe somebody here will be able to help. Im running the munin-master on a debian 7. Here's the config file for the master: Code: dbdir /var/lib/munin htmldir /var/www/it.fau.ch/munin logdir /var/log/munin rundir /var/run/munin tmpldir /etc/munin/templates staticdir /etc/munin/static includedir /etc/munin/munin-conf.d [master.mydomain] address 192.168.1.1 use_node_name yes [kvmserver.mydomain] address 192.168.1.2 use_node_name yes Here the node's config (kvm-server): Code: log_level 4 log_file /var/log/munin/munin-node.log pid_file /var/run/munin/munin-node.pid background 1 setsid 1 user root group root ignore_file [\#~]$ ignore_file DEADJOE$ ignore_file \.bak$ ignore_file %$ ignore_file \.dpkg-(tmp|new|old|dist)$ ignore_file \.rpm(save|new)$ ignore_file \.pod$ host_name kvmserver.mydomain allow 192.168.1.1 cidr_allow 192.168.1.0/24 host 192.168.1.2 port 4949 The Problem is, that i can't gather data from my kvm-servers, running debian 7 as well and having no iptables rules visible with iptables -L --verbose. The munin-master has no iptables rules set as well. Other nodes in the network work, produce munin-data and can be gathered from the master without problems. The munin-master log shows me following error: Code: 2014/02/05 11:02:02 [FATAL] Socket read timed out to kvmserver.mydomain. Terminating process. at /usr/share/perl5/Munin/Master/UpdateWorker.pm line 254 2014/02/05 11:02:02 [ERROR] Munin::Master::UpdateWorker<mydomain;kvmserver.mydomain> died with '[FATAL] Socket read timed out to kvmserver.mydomain. Terminating process. at /usr/share/perl5/Munin/Master/UpdateWorker.pm line 254 No Problems are mentioned in the logs on the node's side. If i test the munin-node from the master with telnet, following problem occurs: Code: telnet kvmserver.mydomain 4949 Trying 192.168.1.2... Connected to kvmserver.mydomain. Escape character is '^]'. and then the connection freezes and after a long timeout, the connection is closed. I've tried to disable all the plugins except the uptime one... which works fine when i try it with Code: munin-run uptime uptime.value 8.04 on the node. But as soon as i want to gather the data from the master, it fails. Since i have the same version of munin-node running on other debian7 hosts and its working like charm, i've run out of clues to check... The Munin Version installed on all the boxes is 2.0.6-4+deb7u2 for the master and the nodes. If you know, what could be the problem, please help