In a previous article I wrote about how to install Openstack Icehouse on CentOS 6.5 in great detail. In this article, I am going to keep verbosity to a minimum and just give you the commands ! I am hoping this will be refreshing for my audience. If you are curious however, about the what, … [Read more…]
I’m a huge Ubuntu fan. However, most of my ‘day job’ work requires CentOS or RHEL, thus I commonly have to re-image my on premise Cloud with the latest and greatest CentOS. My servers are 3 Rackables by SGI, two with more CPU & Memory and one (the controller node) with tons of Disk (12x1TB … [Read more…]
If you run a DNS server on the Internet with a default configuration many people/robots will take advantage of you. The same is true for Mail, but that is another article. Needless to say if you are running a service on the Internet, the naughty goblins will find you. To thwart these dirty criminals all … [Read more…]
The following is intended to be a primer on deployment architecture for systems engineers & software engineers. This is the first architecturally focused post on this blog. The hope is that it will serve as a foundation for future architecturally focused blog posts that I hope you find value in. The Motivation For This Article … [Read more…]
First you have to make sure you are running a version of code that has encryption. See my previous article for instructions on how to upgrade the code. Once your code is upgraded, here are the steps to enable SSH on a Cisco 2950. Generate An SSH Key
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switch-2950-1.tuxlabs.com#config t Enter configuration commands, one per line. End with CNTL/Z. switch-2950-1.tuxlabs(config)#crypto key generate rsa modulus 1024 The name for the keys will be: switch-2950-1.tuxlabs.com.tuxlabs.com % The key modulus size is 1024 bits Generating RSA keys ... [OK] switch-2950-1.tuxlabs(config)#exit switch-2950-1.tuxlabs.com# |
Verify your key like so
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switch-2950-1.tuxlabs.com#show crypto key mypubkey rsa % Key pair was generated at: 00:10:35 UTC Mar 1 1993 Key name: switch-2950-1.tuxlabs.com.tuxlabs.com Usage: General Purpose Key Key Data: 30819F30 0D06092A 864886F7 0D010101 05000381 8D003081 89028181 00E6AA25 8DB58145 F882CD0B C62F5123 AB0064A6 A09BD636 FA854D82 B1510A31 3A00606E 00F601F1 ECF64FCC 0F516E73 E80E0961 9CCCE91B 5C3D5919 4803B805 04AC2633 9D0A32E8 0196F572 5CE9FFF4 A5C27FC4 698DE75B F0573804 22D0CCFE 58936F4E 5BE394F4 3BDED1AC DC1BF1C9 5E71ABD5 34F1C21E CDA47B7E 72D40C34 6B020301 0001 % Key pair was generated at: 00:10:41 UTC Mar 1 1993 Key name: switch-2950-1.tuxlabs.com.tuxlabs.com.server Usage: Encryption Key Key Data: 307C300D 06092A86 4886F70D 01010105 00036B00 30680261 009F3354 2ECB6FB6 7A19D04D 929FEB38 05145D39 C9DB6CAB 5AC1A262 14FEFFBC DE6E5FA9 8565BEA6 1A888A92 C7D1ED2E DB8D3894 D972C9AE 853DFB98 8261D518 0F8A994C 9293C49C 0E946A95 0F89EA08 45E4DCB7 74F5A23C CDC5938C CD01C6C1 4D020301 0001 switch-2950-1.tuxlabs.com# |