My little part of the Internet
Finally had notification that I now am offically CISSP certified !
I’m not a certification chaser but decided late last year I wanted to do something different to pure technical qualifiactions. It was a very long (6 hour/250 questions – some interative) exam and certification process but now all done. Very happy.
Next is keeping up with various things to gain CPE’s
I think Certified Ethical Hacker (CEH) next……
Most people will be familiilar with the RFC 1918 standard for private network addressing.
Reading through a lot of the RFC’s, they have now been superceeded with later versions. The most current appears to be RFC6890 although badly formatted into tables. The prior version RFC5735 has a section 4 which is much more usable.
Address Block Present Use Reference ------------------------------------------------------------------ 0.0.0.0/8 "This" Network RFC 1122, Section 3.2.1.3 10.0.0.0/8 Private-Use Networks RFC 1918 127.0.0.0/8 Loopback RFC 1122, Section 3.2.1.3 169.254.0.0/16 Link Local RFC 3927 172.16.0.0/12 Private-Use Networks RFC 1918 192.0.0.0/24 IETF Protocol Assignments RFC 5736 192.0.2.0/24 TEST-NET-1 RFC 5737 192.88.99.0/24 6to4 Relay Anycast RFC 3068 192.168.0.0/16 Private-Use Networks RFC 1918 198.18.0.0/15 Network Interconnect Device Benchmark Testing RFC 2544 198.51.100.0/24 TEST-NET-2 RFC 5737 203.0.113.0/24 TEST-NET-3 RFC 5737 224.0.0.0/4 Multicast RFC 3171 240.0.0.0/4 Reserved for Future Use RFC 1112, Section 4 255.255.255.255/32 Limited Broadcast RFC 919, Section 7 RFC 922, Section 7
For DEV, LAB and TEST networks this shows two more segments that can be used (198.51.100.0/24 and 203.0.113.0/24) along with one I have used often 192.0.2.0/24.
Its amazing how ofter I have come accross organisations not taking these into account when planning schemes.
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