Category Archives: Linux

VMware Troubles

At the Circus we have been having random reboots and are struggling to figure out the culprit as no one can seem to find any errors in the logs.  In order to help narrow the scope I wrote this script … Continue reading

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More Services for the Lab Server

After setting up TACACS+ and FreeRADIUS I decided to go ahead and add more services to my main test lab server. I am using CentOS in the lab, and decided to add a syslog server and an FTP server to … Continue reading

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General Purpose Lab Server

I have a number of servers in the lab, but my main server is a jumpbox that straddles the lab and our network named TLTS1. I wanted to be able to really test authentication in the lab so I decided … Continue reading

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Webmail with SSL Certificates

This stack is part of a larger project that I created nearly ten years ago. I am on the fourth rewrite of this for some internal email. We are in the process of migrating from Cyrus and Squirrelmail to Dovecot … Continue reading

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Linux NAT with a Web Interface

In 2006 I wrote a web interface for Linux NAT tables. It was not pretty, but it moved NAT from the core routers or firewalls onto a server that the PC Techs could manage. The goal was to push management … Continue reading

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ELK Stack

My basic configuration. rsyslog –> Logstash –> Elasticsearch –> Kibana with GeoIP At this time I do not plan to proxy Kibana with Nginx. The goal here is to keep the setup and configuration as simple as possible. Versions: CentOS … Continue reading

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Linux iSCSI Multipath on NetApp

Linux iSCSI multipath on NetApp Install the iSCSI and multipath rpms. A little note about initiator naming. I tried to change mine to be similar to how we set up targets on Linux and fumbled around for hours. When I … Continue reading

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Fighting Multipath

2013-11-19 08:44:59 [root@chevelle ~]# cat /etc/multipath/bindings # Multipath bindings, Version : 1.0 # NOTE: this file is automatically maintained by the multipath program. # You should not need to edit this file in normal circumstances. # # Format: # alias … Continue reading

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Upgrading ISC Bind and DHCP

Our secondary DNS and DHCP server died last Sunday. Besides some people noticing some services were slower on the network it was a non-event, and that is a good thing. Rather than just doing a restore of the old server, … Continue reading

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Storage Pod

At the Circus we just built our first Backblaze storage pod and I would like to take the time to document it. We rebuilt the server a number of times for testing and verification with different numbers of disks so … Continue reading

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