HTTP and HTTPS with f5 GSLB

This morning I cam across a issue many before have come across: GSLB with HTTP and HTTPS For those not familiar, GSLB is Global Server Load Balancing. We use f5 devices at work because they seem to be flexible and bulletproof. We have yet to come across something we can not get them to handle! …

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Replacing all disks in an Equallogic PS series SAN

I recently ran into a situation where i was maxing out the disk IO in a PS6000 SAN with 16 1TB SATA disks. Rather than replace the whole SAN, i wanted to just replace the disks since i wasn’t maxing the network links. I got a quote from Dell for some SAS disks: *whistles* I …

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Power DNS returning NXDOMAIN for non-authoritive domains

I came across a weird one this morning while doing a check of our DNS name servers When i did a lookup for google.com against our authoritive name servers, they were returning NXDOMAIN – this is not what it should be returning (should be returning SERVFAIL or REFUSED)! These servers are neither authorised for google.com …

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Cisco Terminal Server quick start

Recently i was playing with a Cisco AS2511-RJ which is a 16 port console server to connect to the console port of other devices. Whilst playing with it, i just wanted a quick guide to the commands to use but struggled to find one… A good config example that i liked was here: http://ntlogic.net/2012/05/21/cisco-access-server-as2511-rj-config-and-connections/ In …

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VMware domain controller issues

Recently I setup a couple of VMware clusters, as you may have guessed, and joined them to our company AD servers. I followed this blog here: http://www.gabesvirtualworld.com/adding-ad-authentication-to-vmware-sso-5-1/    (thanks Gabe!) as it did a really good job of simplifying what needed to be done. Upon going through it all, i was greeted with a error from …

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