{"id":3930,"date":"2026-05-12T09:34:05","date_gmt":"2026-05-12T09:34:05","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-is-nat-network-address-translation\/"},"modified":"2026-06-09T10:29:51","modified_gmt":"2026-06-09T10:29:51","slug":"what-is-nat-network-address-translation","status":"publish","type":"post","link":"https:\/\/lp.szlogic.cn\/ru\/glossary\/what-is-nat-network-address-translation","title":{"rendered":"A Clear Guide to NAT (Network Address Translation)"},"content":{"rendered":"<h2 class=\"wp-block-heading\" >&#x1f501; What Is NAT (Network Address Translation)?<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"390\" src=\"https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a69651e162e64fc4b16aa9e7d8ccc880.webp\" alt=\"What Is NAT (Network Address Translation)?\" class=\"wp-image-3927\" srcset=\"https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a69651e162e64fc4b16aa9e7d8ccc880.webp 1200w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a69651e162e64fc4b16aa9e7d8ccc880-300x98.webp 300w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a69651e162e64fc4b16aa9e7d8ccc880-1024x333.webp 1024w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a69651e162e64fc4b16aa9e7d8ccc880-768x250.webp 768w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a69651e162e64fc4b16aa9e7d8ccc880-18x6.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Network Address Translation (NAT)<\/strong> allows multiple devices on a private network to share one or a few public <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/glossary\/what-is-an-ipv4-address-and-why-ipv4-addresses-matter\">IPv4<\/a> addresses when accessing the Internet. It rewrites the source or destination IP address (and sometimes port numbers) of packets as they pass through a router or firewall, enabling private hosts to communicate with external networks securely and efficiently.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >&#x1f501; Why NAT Exists<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The primary purpose of NAT is to conserve <strong>public IPv4 addresses<\/strong> and provide an extra layer of privacy. Since IPv4 addresses are limited, NAT lets organizations use private IP ranges (e.g., 192.168.x.x or 10.x.x.x) internally while using a single public IP for all outbound traffic.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >&#x1f501; Main NAT Types<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Static NAT<\/strong> \u2014 One-to-one mapping between an internal IP and a public IP. Common for internal servers that must be reachable from the Internet.<\/p><\/li><li><p><strong>Dynamic NAT<\/strong> \u2014 Internal IPs are mapped to public IPs from a pool, created temporarily as needed.<\/p><\/li><li><p><strong>PAT (Port Address Translation)<\/strong> \u2014 Also known as <strong><em>NAT Overload<\/em><\/strong>. Multiple internal devices share a single public IP using different source ports. The most common NAT form is in home <a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/knowledge-center\/what-is-a-router-key-functions-types\">routers<\/a>.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >&#x1f501; How PAT Works<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a892796be1f6462baa4db5ab99e56889.png\" alt=\"What Is NAT (Network Address Translation)?\" class=\"wp-image-3928\" srcset=\"https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a892796be1f6462baa4db5ab99e56889.png 1536w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a892796be1f6462baa4db5ab99e56889-300x200.png 300w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a892796be1f6462baa4db5ab99e56889-1024x683.png 1024w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a892796be1f6462baa4db5ab99e56889-768x512.png 768w, https:\/\/lp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a892796be1f6462baa4db5ab99e56889-18x12.png 18w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">When a device on a <strong>private LAN<\/strong> (e.g., 192.168.1.10:50000) sends traffic to the Internet, the NAT device replaces the source with its <strong>public IP<\/strong> (e.g., 203.0.113.5:40000). It records the mapping so that when responses return to 203.0.113.5:40000, they are correctly forwarded back to 192.168.1.10:50000. This mapping allows multiple devices to share one external IP address.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >&#x1f501; Benefits of NAT<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Conserves <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/glossary\/what-is-an-ipv4-address-and-why-ipv4-addresses-matter\"><strong>IPv4 addresses<\/strong><\/a> by allowing many internal hosts to use one public IP.<\/p><\/li><li><p><strong>Hides internal network structure<\/strong>, enhancing privacy.<\/p><\/li><li><p><strong>Simplifies deployment<\/strong>, as end devices don\u2019t need public IPs or complex routing.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >&#x1f501; Limitations of NAT<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Breaks end-to-end connectivity<\/strong>, complicating peer-to-peer or inbound access.<\/p><\/li><li><p><strong>Causes protocol issues<\/strong> when IP\/port data is embedded (e.g., SIP, FTP).<\/p><\/li><li><p><strong>Adds complexity<\/strong> to logging, troubleshooting, and scaling large deployments.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >&#x1f501; NAT and IPv6<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/knowledge-center\/understanding-ipv6-address-structure-benefits-and-transition\"><strong>IPv6<\/strong><\/a> offers virtually unlimited IP addresses, reducing the need for <strong>NAT<\/strong>. Instead of translation, IPv6 encourages <em>end-to-end communication<\/em> with privacy and firewall mechanisms. <strong>NAT66<\/strong> (IPv6-to-IPv6 translation) is generally discouraged except for specific use cases like address independence.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\" >&#x1f501; NAT Traversal Techniques<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Applications needing direct peer connections (like VoIP or video calls) use NAT traversal protocols such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>STUN \/ TURN \/ ICE<\/strong> \u2013 For WebRTC and real-time media.<\/p><\/li><li><p><strong>UPnP \/ NAT-PMP<\/strong> \u2013 For automatic port mapping in trusted environments.<\/p><\/li><li><p><strong>ALGs or static port forwarding<\/strong> \u2013 For legacy protocols requiring inbound access.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >&#x1f501; Best Practices for LINK-PP Customers<\/h2>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>Match deployment scale:<\/strong><\/p><ul><li><p>Home or SMB: Use PAT on edge routers.<\/p><\/li><li><p>Enterprise\/ISP: Use public address pools or CGNAT with detailed logging.<\/p><\/li><\/ul><\/li><li><p><strong>Enable NAT features:<\/strong> Support UPnP, dynamic mapping, and secure logging.<\/p><\/li><li><p><strong>Plan for <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/resources.l-p.com\/knowledge-center\/understanding-ipv6-address-structure-benefits-and-transition\"><strong>IPv6<\/strong><\/a><strong>:<\/strong> Choose dual-stack network devices to reduce NAT dependency.<\/p><\/li><li><p><strong>Security:<\/strong> Always pair NAT with a stateful firewall and updated firmware.<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Looking for high-performance <strong>Ethernet connectors and PoE modules<\/strong> compatible with NAT-enabled devices?<br\/>Explore LINK-PP\u2019s full range of <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>RJ45 connectors<\/strong><\/a> and <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\"><strong>LAN magnetics<\/strong><\/a> to ensure stable, efficient network operation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >&#x1f501; FAQ<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Is NAT the same as a firewall?<\/strong><br\/>A: No. NAT modifies IP\/port headers; a firewall filters traffic by policy. Many routers combine both.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Does NAT protect my network from all threats?<\/strong><br\/>A: Not entirely. NAT hides IPs but doesn\u2019t block malicious traffic\u2014firewalls are still required.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Should I disable NAT if I use IPv6?<\/strong><br\/>A: Yes, if possible. Use IPv6 with firewall protection instead of translation.<\/p>","protected":false},"excerpt":{"rendered":"<p>Learn how NAT (Network Address Translation) works, its types, benefits, limitations, and best practices for IPv6 and enterprise deployments.<\/p>","protected":false},"author":1,"featured_media":3929,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[22,23,25],"class_list":["post-3930","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-integrated-rj45-connectors","tag-link-pp-lan-transformers","tag-modular-jack"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/posts\/3930","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/comments?post=3930"}],"version-history":[{"count":3,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/posts\/3930\/revisions"}],"predecessor-version":[{"id":9256,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/posts\/3930\/revisions\/9256"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/media\/3929"}],"wp:attachment":[{"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/media?parent=3930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/categories?post=3930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lp.szlogic.cn\/ru\/wp-json\/wp\/v2\/tags?post=3930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}