The ramblings of a computer geek
VMware resource pools are a bit weird. They don’t work the way you would assume them to, so it is easy to get the wrong. This article details quite simply how you can use them for an example to illustrate this I will use my live production environment to illustrate how and how not to […]
More...I had this as a challenge, we have SAN replication, so you could replicate and promote your storage to achieve the same thing, but I was looking for a quick and dirty way to get a VM from one data centre to another data centre quickly and easily. So in this example I have two […]
More...We had a weird graphical glitch on the timeline webpart on our SharePoint installation, we couldn’t figure out what was happening. Until that is we checked out the element in F12 Developer tools, within one of our customisations we used the .ms-rtestate-field img directive within our custom site CSS file. So this is what we […]
More...You can monitor the Dell PowerVault TL4000 Tape Library using the Nagios check_snmp plugin. After setting the TL4000 to accept SNMP connections on v2 SNMP you can run the following command below. This queries for the status of the library as a rollup. # ./check_snmp -H <IP Address> -C community -o .1.3.6.1.4.1.674.10893.2.102.2.1.0 -r3 SNMP OK […]
More...The changes to the ASA IOS post version 8.3 changes the way that NAT works. NAT Exemption is normally used to disable translation for certain addresses e.g. for VPN tunnelling. So for this example below you create an access-list containing the IP addresses that are to be exempted from NAT. So say these are the […]
More...On a Cisco ASA firewall you will probably want to use the DMZ for servers that are web facing, and also restrict/deny any access they have to the internal network. The idea being that a connection to a web server say in your DMZ would get into the DMZ, and if another connection is required […]
More...Pre version 8.3 to statically NAT an internal host to an external IP address you would use the following: This then means…… inside = the source interface for the NAT connection (assuming going from the inside to the outside) outside = the translated interface for the NAT connection 212.219.63.195 = External IP address to which […]
More...Okay a basic example with a Cisco ASA for the NAT rules. Lets say there is PC1 on the inside network that you want to have internet access. The IP address 192.168.1.100 can’t just connect to the Internet using that IP address as its not routable, so instead we need to translate it. In this […]
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