{"id":49,"date":"2026-06-25T04:55:19","date_gmt":"2026-06-25T04:55:19","guid":{"rendered":"http:\/\/jhp.ccb.mytemp.website\/?p=49"},"modified":"2026-09-19T17:28:23","modified_gmt":"2026-09-19T11:58:23","slug":"fortigate-lan-internet-configuration","status":"publish","type":"post","link":"https:\/\/networkfix.in\/en\/tutorials\/fortinet\/fortigate-lan-internet-configuration\/","title":{"rendered":"How to Configure a FortiGate Firewall for LAN Internet Access"},"content":{"rendered":"<h1 class=\"wp-block-heading\"><\/h1>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">Configuring a FortiGate firewall for secure LAN internet access is one of the first tasks every network administrator performs after deploying a new firewall. Whether you are setting up a branch office, a home lab, or an enterprise network, the initial configuration determines how users access the internet while maintaining security and performance.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-opt-id=1469797147  fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mlwonxngeomz.i.optimole.com\/w:1024\/h:683\/q:mauto\/f:best\/http:\/\/networkfix.in\/wp-content\/uploads\/2026\/06\/Fortigate_internet-access.png\" alt=\"\" class=\"wp-image-97\" srcset=\"https:\/\/mlwonxngeomz.i.optimole.com\/w:1024\/h:683\/q:mauto\/f:best\/https:\/\/networkfix.in\/wp-content\/uploads\/2026\/06\/Fortigate_internet-access.png 1024w, https:\/\/mlwonxngeomz.i.optimole.com\/w:300\/h:200\/q:mauto\/f:best\/https:\/\/networkfix.in\/wp-content\/uploads\/2026\/06\/Fortigate_internet-access.png 300w, https:\/\/mlwonxngeomz.i.optimole.com\/w:768\/h:512\/q:mauto\/f:best\/https:\/\/networkfix.in\/wp-content\/uploads\/2026\/06\/Fortigate_internet-access.png 768w, https:\/\/mlwonxngeomz.i.optimole.com\/w:360\/h:240\/q:mauto\/f:best\/https:\/\/networkfix.in\/wp-content\/uploads\/2026\/06\/Fortigate_internet-access.png 360w, https:\/\/mlwonxngeomz.i.optimole.com\/w:1536\/h:1024\/q:mauto\/f:best\/https:\/\/networkfix.in\/wp-content\/uploads\/2026\/06\/Fortigate_internet-access.png 1536w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In this comprehensive guide, you&#8217;ll learn how to configure a FortiGate firewall running FortiOS 7.x for LAN internet connectivity. By the end of this tutorial, your firewall will be able to provide IP addresses to LAN clients, route internet traffic through the WAN interface, perform source NAT, and enforce security policies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide is suitable for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Network Engineers<\/li>\n\n\n\n<li>Security Engineers<\/li>\n\n\n\n<li>System Administrators<\/li>\n\n\n\n<li>Students preparing for Fortinet certifications<\/li>\n\n\n\n<li>Anyone deploying a FortiGate firewall for the first time<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Network Topology<\/h1>\n\n\n\n<pre class=\"wp-block-code\"><code>                Internet\n                    \u2502\n               ISP Router\n                    \u2502\n                 WAN1 Port\n              +-------------+\n              | FortiGate   |\n              +-------------+\n                    \u2502\n                 LAN Port\n                    \u2502\n                 Switch\n                    \u2502\n      \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n      \u2502             \u2502             \u2502\n     PC-1          PC-2         Laptop\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Prerequisites<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Before you begin, ensure that you have:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A FortiGate firewall running FortiOS 7.x<\/li>\n\n\n\n<li>Administrative access to the GUI or CLI<\/li>\n\n\n\n<li>An active ISP connection<\/li>\n\n\n\n<li>A computer connected to the LAN interface<\/li>\n\n\n\n<li>The ISP gateway IP address<\/li>\n\n\n\n<li>DNS server information (Google DNS, Cloudflare DNS, or your ISP DNS)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Step 1 \u2013 Configure the WAN Interface<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The WAN interface connects your FortiGate firewall to your Internet Service Provider (ISP).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Navigate to:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Network \u2192 Interfaces<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Select&nbsp;<strong>WAN1<\/strong>&nbsp;and configure the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Interface Role: WAN<\/li>\n\n\n\n<li>Addressing Mode:\n<ul class=\"wp-block-list\">\n<li>DHCP (recommended if assigned automatically by the ISP)<\/li>\n\n\n\n<li>Static IP (if provided by the ISP)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Gateway<\/li>\n\n\n\n<li>Administrative Access (HTTPS, Ping, SSH as required)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Click&nbsp;<strong>OK<\/strong>&nbsp;to save the configuration.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Example Static Configuration<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>IP Address<\/td><td>203.0.113.10\/30<\/td><\/tr><tr><td>Gateway<\/td><td>203.0.113.9<\/td><\/tr><tr><td>DNS<\/td><td>8.8.8.8, 1.1.1.1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">After configuring the interface, verify that the WAN status is&nbsp;<strong>Up<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Step 2 \u2013 Configure the LAN Interface<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Next, configure the LAN interface that will connect your internal users.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Navigate to:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Network \u2192 Interfaces<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Edit the&nbsp;<strong>LAN<\/strong>&nbsp;interface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example configuration:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>IP Address<\/td><td>192.168.1.1\/24<\/td><\/tr><tr><td>Administrative Access<\/td><td>HTTPS, Ping, SSH<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The LAN IP becomes the default gateway for all connected devices.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Step 3 \u2013 Configure the DHCP Server<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Instead of assigning IP addresses manually, configure the FortiGate as the DHCP server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Go to:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Network \u2192 Interfaces<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Edit the LAN interface and enable the DHCP Server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended configuration:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Start IP<\/td><td>192.168.1.100<\/td><\/tr><tr><td>End IP<\/td><td>192.168.1.200<\/td><\/tr><tr><td>Default Gateway<\/td><td>192.168.1.1<\/td><\/tr><tr><td>DNS Server<\/td><td>Same as System DNS<\/td><\/tr><tr><td>Lease Time<\/td><td>86400 seconds<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Once enabled, clients connected to the LAN automatically receive network settings.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Step 4 \u2013 Configure System DNS<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">DNS enables users to resolve domain names such as&nbsp;<strong>google.com<\/strong>&nbsp;into IP addresses.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Navigate to:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Network \u2192 DNS<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended public DNS servers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Primary DNS: 8.8.8.8<\/li>\n\n\n\n<li>Secondary DNS: 1.1.1.1<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Alternatively, use your organization&#8217;s internal DNS servers if required.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Step 5 \u2013 Configure the Default Route<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Without a default route, internet traffic cannot leave the firewall.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Navigate to:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Network \u2192 Static Routes<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Create a new static route.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Configuration:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Destination<\/td><td>0.0.0.0\/0<\/td><\/tr><tr><td>Gateway<\/td><td>ISP Gateway<\/td><\/tr><tr><td>Interface<\/td><td>WAN1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Save the configuration.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Step 6 \u2013 Create the Firewall Policy<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Firewall policies determine which traffic is allowed to pass through the firewall.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Go to:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Policy &amp; Objects \u2192 Firewall Policy<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Create a new policy with the following settings:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Name<\/td><td>LAN-to-Internet<\/td><\/tr><tr><td>Incoming Interface<\/td><td>LAN<\/td><\/tr><tr><td>Outgoing Interface<\/td><td>WAN1<\/td><\/tr><tr><td>Source<\/td><td>All<\/td><\/tr><tr><td>Destination<\/td><td>All<\/td><\/tr><tr><td>Service<\/td><td>ALL<\/td><\/tr><tr><td>Action<\/td><td>ACCEPT<\/td><\/tr><tr><td>Schedule<\/td><td>Always<\/td><\/tr><tr><td>NAT<\/td><td>Enabled<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Enabling Source NAT allows multiple internal devices to share a single public IP address.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Step 7 \u2013 Verify Internet Connectivity<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">After completing the configuration, verify that internet access is working correctly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Run the following CLI commands:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>execute ping 8.8.8.8\n\nexecute ping www.google.com\n\nget router info routing-table all\n\ndiagnose ip route list\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Successful responses confirm that routing and DNS resolution are functioning correctly.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Useful CLI Configuration<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The following example performs the entire basic setup from the CLI.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>config system interface\n    edit \"wan1\"\n        set mode static\n        set ip 203.0.113.10\/30\n        set allowaccess ping https ssh\n    next\nend\n\nconfig router static\n    edit 1\n        set gateway 203.0.113.9\n        set device \"wan1\"\n    next\nend\n\nconfig firewall policy\n    edit 1\n        set name \"LAN-to-Internet\"\n        set srcintf \"lan\"\n        set dstintf \"wan1\"\n        set srcaddr \"all\"\n        set dstaddr \"all\"\n        set action accept\n        set service \"ALL\"\n        set schedule \"always\"\n        set nat enable\n    next\nend\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Troubleshooting FortiGate Internet Access<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">If internet connectivity is not working after completing the configuration, review the following checks:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Verify WAN Interface Status<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Confirm that the WAN interface is operational and has received the correct IP address.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>get system interface\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Verify Routing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ensure that a default route exists.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>get router info routing-table all\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Verify Firewall Policy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Check that traffic matches the LAN-to-WAN firewall policy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Review the hit counters in the GUI or use:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>diagnose firewall iprope lookup\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Verify NAT<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ensure Source NAT is enabled on the outbound firewall policy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Without NAT, private IP addresses cannot communicate with the public internet.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Verify DNS Resolution<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Test DNS resolution directly from the firewall.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>execute ping www.google.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If IP-based pings succeed but hostname resolution fails, review your DNS configuration.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Capture Traffic<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Use the built-in packet sniffer to verify that packets are leaving the WAN interface.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>diagnose sniffer packet any \"host 8.8.8.8\" 4\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Use Debug Flow<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Debug Flow helps determine why traffic is denied or dropped.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>diagnose debug enable\ndiagnose debug flow filter addr 192.168.1.100\ndiagnose debug flow trace start 100\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"How to Configure SD-WAN on FortiGate Firewall (FortiOS 7.x)\" width=\"750\" height=\"422\" src=\"https:\/\/www.youtube.com\/embed\/pQKul0qHM8A?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Real-World Validation Checklist<\/h2>\n<p>After completing the configuration, validate the entire traffic path rather than checking only whether the policy exists.<\/p>\n<ol>\n<li>Connect a LAN client and confirm it receives the expected IP address, gateway and DNS settings.<\/li>\n<li>Ping the FortiGate LAN gateway from the client.<\/li>\n<li>Test an external IP address to separate routing\/NAT problems from DNS problems.<\/li>\n<li>Test a hostname such as <code>www.google.com<\/code> to verify DNS resolution.<\/li>\n<li>Check the firewall policy hit counter and confirm the expected policy is matching the session.<\/li>\n<li>Check the session table to verify that the connection is established and the source is being translated.<\/li>\n<li>Use packet capture or Debug Flow if traffic is still failing.<\/li>\n<\/ol>\n<p>A useful troubleshooting rule is to verify the path in this order: <strong>client \u2192 LAN interface \u2192 firewall policy \u2192 NAT \u2192 default route \u2192 WAN \u2192 DNS\/application response<\/strong>. This prevents changing several unrelated settings at the same time.<\/p>\n\n<h2 class=\"wp-block-heading\">Common Deployment Mistakes<\/h2>\n<ul>\n<li>LAN clients receive an IP address but have the wrong default gateway.<\/li>\n<li>The firewall policy exists but does not match the actual source or destination interface.<\/li>\n<li>Source NAT is not enabled on the Internet access policy.<\/li>\n<li>The default route points to the wrong upstream gateway.<\/li>\n<li>DNS is configured incorrectly, making IP connectivity appear to work while websites fail.<\/li>\n<li>Diagnostic tests are performed from the wrong FortiGate interface or source address.<\/li>\n<\/ul>\n\n<h1 class=\"wp-block-heading\">Best Practices<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">To improve security and long-term manageability, follow these recommendations:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Change the default administrator password immediately.<\/li>\n\n\n\n<li>Restrict administrative access to trusted management networks.<\/li>\n\n\n\n<li>Keep FortiOS updated with the latest security patches.<\/li>\n\n\n\n<li>Create meaningful names for firewall policies and interfaces.<\/li>\n\n\n\n<li>Back up the firewall configuration after every major change.<\/li>\n\n\n\n<li>Use security profiles such as Antivirus, IPS, Web Filtering, and Application Control where appropriate.<\/li>\n\n\n\n<li>Monitor logs regularly to identify abnormal traffic patterns.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Frequently Asked Questions<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">How do I configure internet access on a <a href=\"https:\/\/docs.fortinet.com\" data-type=\"link\" data-id=\"https:\/\/docs.fortinet.com\">FortiGate<\/a> firewall?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Configure the WAN interface, assign an IP address to the LAN interface, enable DHCP, configure DNS, create a default route, and add a firewall policy with Source NAT enabled.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why is my FortiGate not providing internet access?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Common causes include a missing default route, disabled NAT, incorrect DNS settings, WAN interface issues, or a firewall policy that does not match the traffic.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Do I need to enable NAT?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. For most internet deployments, Source NAT must be enabled so that private IP addresses can access public networks.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Can I configure the FortiGate entirely from the CLI?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. FortiGate supports complete configuration through the CLI, making it ideal for automation and scripted deployments.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Which DNS servers should I use?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Google DNS (8.8.8.8 and 8.8.4.4) or Cloudflare DNS (1.1.1.1 and 1.0.0.1) are common choices, though enterprise environments often use internal DNS servers.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Conclusion<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Configuring a FortiGate firewall for LAN internet access is a straightforward process when completed in the correct order. By configuring the WAN and LAN interfaces, enabling DHCP, defining DNS settings, creating a default route, and applying a firewall policy with Source NAT, you establish a secure and reliable internet connection for your users.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Additionally, verifying connectivity with diagnostic commands and following best practices helps prevent common deployment issues. As your network grows, you can extend this configuration with VLANs, SD-WAN, VPNs, security profiles, high availability, and centralized management through FortiManager.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If this guide helped you, explore our other Fortinet tutorials covering VPN configuration, SD-WAN deployment, security profiles, troubleshooting, and advanced FortiOS administration. You can also subscribe to the\u00a0<strong><a href=\"https:\/\/Networkfix.in\" data-type=\"link\" data-id=\"https:\/\/Networkfix.in\">Netwo<\/a>rkFix<\/strong>\u00a0YouTube channel for in-depth, hands-on networking and cybersecurity tutorials.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Configuring a FortiGate firewall for secure LAN internet access is one of the first tasks every network administrator performs after deploying a new firewall. Whether you are setting up a branch office, a home lab, or an enterprise network, the initial configuration determines how users access the internet while maintaining [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":97,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","rank_math_title":"","rank_math_description":"","rank_math_focus_keyword":"","_dpc-meta-title":"","_dpc-meta-description":"","_dpc-keyword":""},"categories":[4],"tags":[],"class_list":["post-49","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fortinet"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>FortiGate LAN Internet Access Configuration: Step-by-Step Guide<\/title>\n<meta name=\"description\" content=\"Learn how to configure FortiGate LAN internet access with 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