Networking on Shane Cunningham

OpenStack Juno All in One

Sat, 08 Nov 2014 11:32:31 +0000

Quick guide on setting up the OpenStack Juno release in an all in one server with one NIC using RDO. This is configured for Neutron networking with floating IPs.

My setup: CentOS 7 minimal, IP: 192.168.1.100

By default NetworkManager will be running and controlling our NICs. packstack will complain about this later so disable and stop the service.

console

[root@juno-allinone ~]# systemctl disable NetworkManager
[root@juno-allinone ~]# systemctl stop NetworkManager

Next we’ll update some stuff, install the RDO Juno repo and install packstack.

Add Cloud Networks to existing Cloud Server

Sat, 15 Jun 2013 06:14:02 +0000

Cloud Networks is a really cool up and coming feature in the Rackspace Cloud. It enables you to create private networks only accessible by your Cloud infrastructure. When first released, you could only attach a Cloud Server to Cloud Networks when creating a new Cloud Server or by taking an image and then creating a new Cloud Server based off of that image and attaching Cloud Networks at that time. Not the best situation if you already have a stable Cloud infrastructure. Luckily we can now attach Cloud Networks to an already running Cloud Server. Make sure the server is a NextGen Cloud Server based on OpenStack. This tutorial was run on Debian 6 Squeeze, but should be pretty much the same on other Linux distros. If you have any issues with a particular distro please let me know.

VM not sending hostname to DNS/DHCP server

Wed, 13 Feb 2013 07:23:18 +0000

On some VMs I spin up on ESXi the hostname is not sent to my DNS/DHCP server running in pfSense. Haven’t found exactly why because it seems occasionally Ubuntu VMs do send this correctly on first boot. I’m probably doing something not smart. Anyway, you can easily fix this problem by adding the following -

CentOS/Ubuntu
Add this to /etc/sysconfig/network

text

DHCP_HOSTNAME=hostname

Replace hostname with your servers hostname and restart networking. It should now send the hostname to your DNS/DHCP server.

pfSense, Squid and logging full URLs

Fri, 02 Nov 2012 04:18:41 +0000

By default the Squid package that pfSense installs will cut off the URLs if they are longer than a certain length. If you want it to log the full URL, add this to your squid.conf file. The config file says not to manually edit it, but I inserted this and restarted squid and everything continued working.

text

strip_query_terms off

pfSense firewall/router update

Sat, 14 Apr 2012 14:52:21 +0000

I had some issues with accessing IPMI in my pfSense build. It seemed like if I let pfSense boot up and I was not accessing IPMI at the same time, pfSense would take over the whole NIC and not let me access IPMI. I read here that this is normal to not be able to access IPMI once pfSense boots but that defeats the whole purpose of IPMI so I don’t think the system should behave in that way. After messing with it for a few days all I can say is IPMI seems really finicky when sharing a NIC, or maybe I’m doing something goofy.

My pfSense firewall/router build

Thu, 05 Apr 2012 02:43:03 +0000

I stuck with a D-Link DIR-625 wireless router doing all my routing for entirely too long. I had an old P4 2.66 GHz PC laying around with a 40GB hard drive so I decided to try out pfSense. I was hooked, the overall performance and features of this open source FreeBSD firewall/router were impressive. My old P4 machine was using too much electricity for something that was on 24 x 7, though. I decided to custom build something that was 1. powerful enough for my home network and virtual environment lab 2. low power draw 3. quite.

Two Linux notes

Thu, 29 Mar 2012 03:17:26 +0000

SSH Tunnel for web traffic

ssh -D 9998 -C shane@myserver.com

Where “myserver.com” is a server you operate with SSH setup. Now you need to configure your browser to use the tunnel. In OS X you can go to Network -> Advanced -> Proxies -> Check SOCKS and input localhost:9998 or whatever port you used. Directly from Chrome you can also select Preferences -> Under The Hood -> Change Proxy Settings… -> and it will go directly to your OS X Network/Proxies tab.