Cisco IOS – Enabling LLDP
KB ID 0001289 Problem If you’re running Cisco IOS on all you devices then you can use CDP to see what’s directly connected, (unless you are on a Cisco firewall, but I did say IOS devices). Petes-Switch#show cdp neighbors Capability Codes: R – Router, T – Trans Bridge, B – Source Route Bridge S – Switch, H – Host, I – IGMP, r – Repeater, P – Phone, D – Remote, C...
Can A Domain Trust Another Domain With The Same ‘Root Domain’ Name?
KB ID 0001288 Problem About a month ago I was with a client to do some investigation/consultancy, they were a large company with their head office in the UK and a number of other offices around the world. They had a number of domains and sub domains and wanted to consolidate them all into a new domain. Well that’s all OK, but the UK company has been purchased by a large American company, who were putting a lot of pressure on...
Windows – A Delegation For This DNS Server Cannot Be Created
KB ID 0001287 Problem When promoting a server to be a domain controller, you might see the following error, “A delegation for this DNS server cannont be created because the authoritative parent zone cannot be found or it does not run Windows DNS server. If you are intergrating with an existing DNS infrastructure, you should manually create a delegation to this DNS server in the parent zone to ensure reliable name resolution from...
Cisco FirePOWER is Blocking an Application
KB ID 0001286 Problem A few weeks ago I installed a 5525-X firewall for a client, and set it up as follows; ASA Setup FirePOWER Services (for ASDM) And all was well, then a week later I got an email… One of our teachers is doing a project with MATHS and ICT involving bitcoin. Basically, he has something called BITCOIN CORE WALLET installed and it used to work with the old Firewall. I’ve installed it on my work laptop and taken...
Avaya / Nortel Switch Notes
KB ID 0001285 Problem I don’t often use Nortel (now Avaya) switches, I know they are decent, but in my day job I usually work on Cisco, occasionally HP, and other cheap assorted nastiness switches. I was replacing an old 10/100 Cisco 3750 switch with a Nortel 4526GTX this week, and thought I’d take some notes for the common things I do, just in case I have to do another. So this post is an eclectic collection of the...