{"id":218,"date":"2015-01-08T14:34:33","date_gmt":"2015-01-08T14:34:33","guid":{"rendered":"http:\/\/iddles.co.uk\/blogs\/?p=218"},"modified":"2015-01-08T14:34:33","modified_gmt":"2015-01-08T14:34:33","slug":"private-network-address-ranges","status":"publish","type":"post","link":"https:\/\/iddles.co.uk\/index.php\/2015\/01\/08\/private-network-address-ranges\/","title":{"rendered":"Private Network Address ranges"},"content":{"rendered":"

Most people will be familiilar with the RFC 1918 standard for private network addressing.
\nReading through a lot of the RFC’s, they have now been superceeded with later versions.\u00a0 The most current appears to be RFC6890<\/a> although badly formatted into tables.\u00a0\u00a0 The prior version RFC5735<\/a> has a section 4 which is much more usable.<\/p>\n

Address Block\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Present Use\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Reference\n ------------------------------------------------------------------\n 0.0.0.0\/8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \"This\" Network\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 1122, Section\u00a03.2.1.3<\/a>\n 10.0.0.0\/8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Private-Use Networks\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0RFC 1918<\/a>\n 127.0.0.0\/8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Loopback\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 1122, Section\u00a03.2.1.3<\/a>\n 169.254.0.0\/16\u00a0\u00a0\u00a0\u00a0\u00a0 Link Local\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 3927<\/a>\n 172.16.0.0\/12\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Private-Use Networks\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 1918<\/a>\n 192.0.0.0\/24\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 IETF Protocol Assignments\u00a0  RFC 5736<\/a>\n 192.0.2.0\/24\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 TEST-NET-1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 5737<\/a>\n 192.88.99.0\/24\u00a0\u00a0\u00a0\u00a0\u00a0 6to4 Relay Anycast\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 3068<\/a>\n 192.168.0.0\/16\u00a0\u00a0\u00a0\u00a0\u00a0 Private-Use Networks\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 1918<\/a>\n 198.18.0.0\/15\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Network Interconnect\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Device Benchmark Testing\u00a0\u00a0  RFC 2544<\/a>\n 198.51.100.0\/24\u00a0\u00a0\u00a0\u00a0 TEST-NET-2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 5737<\/a>\n 203.0.113.0\/24\u00a0\u00a0\u00a0\u00a0\u00a0 TEST-NET-3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 5737<\/a>\n 224.0.0.0\/4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Multicast\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 3171<\/a>\n 240.0.0.0\/4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Reserved for Future Use\u00a0\u00a0\u00a0  RFC 1112, Section\u00a04<\/a>\n 255.255.255.255\/32\u00a0 Limited Broadcast\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 919, Section\u00a07<\/a>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  RFC 922, Section\u00a07<\/a>\n<\/pre>\n
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.
\nIts amazing how ofter I have come accross organisations not taking these into account when planning schemes.<\/p>\n","protected":false},"excerpt":{"rendered":"
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.\u00a0 The most current appears to be RFC6890 although badly formatted into tables.\u00a0\u00a0 The prior version RFC5735 has a section 4 which is much more usable. Address […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[7,11],"tags":[],"class_list":["post-218","post","type-post","status-publish","format-standard","hentry","category-networking","category-security","post-preview"],"_links":{"self":[{"href":"https:\/\/iddles.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/218","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iddles.co.uk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iddles.co.uk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iddles.co.uk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/iddles.co.uk\/index.php\/wp-json\/wp\/v2\/comments?post=218"}],"version-history":[{"count":0,"href":"https:\/\/iddles.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/218\/revisions"}],"wp:attachment":[{"href":"https:\/\/iddles.co.uk\/index.php\/wp-json\/wp\/v2\/media?parent=218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iddles.co.uk\/index.php\/wp-json\/wp\/v2\/categories?post=218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iddles.co.uk\/index.php\/wp-json\/wp\/v2\/tags?post=218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}