{"id":52080,"date":"2025-09-29T15:56:08","date_gmt":"2025-09-29T12:56:08","guid":{"rendered":"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/"},"modified":"2025-09-29T15:56:08","modified_gmt":"2025-09-29T12:56:08","slug":"common-vpn-issues-in-networking-and-fixes","status":"publish","type":"post","link":"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/","title":{"rendered":"Common Vpn Issues in Networking and Fixes"},"content":{"rendered":"<p><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Why_VPN_problems_happen\" >Why VPN problems happen<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Connection_wont_establish\" >Connection won&#8217;t establish<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Quick_checks\" >Quick checks<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Fixes_to_try\" >Fixes to try<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Connection_drops_or_unstable_VPN\" >Connection drops or unstable VPN<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Common_causes\" >Common causes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#How_to_troubleshoot\" >How to troubleshoot<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Slow_VPN_performance\" >Slow VPN performance<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Why_it_happens\" >Why it happens<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Speed_fixes\" >Speed fixes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#DNS_leaks_and_name_resolution_problems\" >DNS leaks and name resolution problems<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Why_DNS_leaks_matter\" >Why DNS leaks matter<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#How_to_fix_DNS_issues\" >How to fix DNS issues<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#ipv6_leaks\" >ipv6 leaks<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Fixes\" >Fixes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#VPN_blocked_by_network_or_service\" >VPN blocked by network or service<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Why_this_happens\" >Why this happens<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Workarounds\" >Workarounds<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Split_tunneling_problems\" >Split tunneling problems<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Fixes-2\" >Fixes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Firewall_or_antivirus_conflict\" >Firewall or antivirus conflict<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Steps_to_resolve\" >Steps to resolve<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Routing_and_MTU_issues\" >Routing and MTU issues<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#What_to_try\" >What to try<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Client_crashes_or_freezes\" >Client crashes or freezes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Fixes-3\" >Fixes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#When_to_collect_logs_and_ask_for_help\" >When to collect logs and ask for help<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Platform-specific_quick_commands\" >Platform-specific quick commands<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Windows\" >Windows<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#macOS\" >macOS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Linux_systemd_NetworkManager\" >Linux (systemd NetworkManager)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Good_practices_to_prevent_problems\" >Good practices to prevent problems<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/infinitydomainhosting.com\/kb\/common-vpn-issues-in-networking-and-fixes\/#Summary\" >Summary<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Why_VPN_problems_happen\"><\/span>Why VPN problems happen<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>If <a href=\"https:\/\/infinitydomainhosting.com\/kb\/how-to-configure-2fa-step-by-step\/\">a<\/a> VPN doesn\u2019t behave like you expect, it\u2019s usually one of a few things: network settings, the VPN client, the server you chose, or something on your device like a firewall. I\u2019ll walk you through the common symptoms and practical fixes you can try now.<\/p>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Connection_wont_establish\"><\/span>Connection won&#8217;t establish<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: the client never connects, shows &#8220;authentication failed,&#8221; or times out.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Quick_checks\"><\/span>Quick checks<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Confirm your subscription or account credentials are valid.<\/li>\n<p><\/p>\n<li>Make sure your internet connection works without the VPN.<\/li>\n<p><\/p>\n<li>Check system time and date , bad clocks can break certificate checks.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Fixes_to_try\"><\/span>Fixes to try<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Restart the VPN app and your device.<\/li>\n<p><\/p>\n<li>Try a different server in the VPN app.<\/li>\n<p><\/p>\n<li>Switch VPN protocol (e.g., from OpenVPN UDP to <a href=\"https:\/\/www.hostinger.com\/tutorials\/tcp-protocol\" target=\"_blank\" rel=\"noopener\">tcp<\/a>, or to WireGuard\/IKEv2) , TCP on port 443 often helps behind restrictive networks.<\/li>\n<p><\/p>\n<li>If you see certificate errors, re-install the VPN client or import the correct CA cert as instructed by your provider.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Connection_drops_or_unstable_VPN\"><\/span>Connection drops or unstable VPN<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: VPN connects, then disconnects randomly or loses traffic intermittently.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Common_causes\"><\/span>Common causes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Unreliable internet connection or poor Wi\u2011Fi signal.<\/li>\n<p><\/p>\n<li>Server overload or distance causing packet loss.<\/li>\n<p><\/p>\n<li>Router settings like aggressive NAT timeouts.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_to_troubleshoot\"><\/span>How to troubleshoot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Test from a different network (mobile hotspot) to rule out local ISP\/router issues.<\/li>\n<p><\/p>\n<li>Change to a nearby server or one labeled \u201cless crowded.\u201d<\/li>\n<p><\/p>\n<li>Enable the VPN client\u2019s auto-reconnect or use a kill switch if offered.<\/li>\n<p><\/p>\n<li>Update router firmware and check for settings that close idle connections , lengthen NAT timeouts if possible.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Slow_VPN_performance\"><\/span>Slow VPN performance<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: web pages load slowly, streaming buffers, large downloads take ages.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_it_happens\"><\/span>Why it happens<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Encryption and routing add overhead.<\/li>\n<p><\/p>\n<li>Server congestion or too much geographic distance.<\/li>\n<p><\/p>\n<li>ISP throttling of VPN traffic or poor last-mile connectivity.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Speed_fixes\"><\/span>Speed fixes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Pick a closer or less busy server.<\/li>\n<p><\/p>\n<li>Try a faster protocol like WireGuard or IKEv2 if your provider supports it.<\/li>\n<p><\/p>\n<li>Switch from UDP to TCP (or vice versa) and test. UDP is often faster; TCP can be more reliable over lossy links.<\/li>\n<p><\/p>\n<li>Temporarily disable resource-heavy background apps and cloud sync while testing.<\/li>\n<p><\/p>\n<li>Run speed tests with and without the VPN to quantify the difference.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"DNS_leaks_and_name_resolution_problems\"><\/span><a href=\"https:\/\/infinitydomainhosting.com\/index.php?rp=\/knowledgebase\/128\/How-to-manage-your-DNS-settings-for-your-domain.html\">DNS<\/a> leaks and <a href=\"https:\/\/www.hostinger.com\/domain-name-search\" target=\"_blank\" rel=\"noopener\">name<\/a> resolution problems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: websites load but show your real location on <a href=\"https:\/\/www.hostinger.com\/tutorials\/what-is-dns\" target=\"_blank\" rel=\"noopener\">dns<\/a> leak tests, or some <a href=\"https:\/\/www.hostinger.com\/domain-name-search\" target=\"_blank\" rel=\"noopener\">domains<\/a> fail to resolve while connected.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_DNS_leaks_matter\"><\/span>Why DNS leaks matter<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>A DNS leak exposes which domains you visit to your ISP or local network even when other traffic is encrypted.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_to_fix_DNS_issues\"><\/span>How to fix DNS issues<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Enable the VPN client\u2019s DNS leak protection setting if present.<\/li>\n<p><\/p>\n<li>Manually set your device\u2019s DNS servers to the VPN provider\u2019s DNS or to trusted resolvers (e.g., 1.1.1.1, 9.9.9.9).<\/li>\n<p><\/p>\n<li>Flush local <a href=\"https:\/\/www.a2hosting.com\/kb\/getting-started-guide\/internet-and-networking\/clearing-the-dns-cache-on-your-computer\/\" target=\"_blank\" rel=\"noopener\">dns cache<\/a> after changes:<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<pre><code>Windows: ipconfig \/flushdns<br \/>\nmacOS (modern): <a href=\"https:\/\/www.hostinger.com\/tutorials\/sudo-and-the-sudoers-file\/\" target=\"_blank\" rel=\"noopener\">sudo<\/a> killall -HUP mDNSResponder<br \/>\n<a href=\"https:\/\/www.hostinger.com\/tutorials\/linux-commands\" target=\"_blank\" rel=\"noopener\">linux<\/a> (systemd): sudo resolvectl flush-caches<\/code><\/pre>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"ipv6_leaks\"><\/span><a href=\"https:\/\/www.hostinger.com\/tutorials\/ipv4-vs-ipv6\" target=\"_blank\" rel=\"noopener\">ipv6<\/a> leaks<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: IPv6-based IP shows your real address while IPv4 uses the VPN.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Fixes\"><\/span>Fixes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Disable IPv6 on the device or in the router if the VPN doesn\u2019t support IPv6 tunneling.<\/li>\n<p><\/p>\n<li>Use a VPN that explicitly supports IPv6 or performs IPv6 leak protection.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"VPN_blocked_by_network_or_service\"><\/span>VPN blocked by network or service<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: the VPN connects but specific services or websites refuse traffic, or the VPN is outright blocked.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_this_happens\"><\/span>Why this happens<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p>Some networks (work, school, certain countries) block common VPN ports or deep-packet <a href=\"https:\/\/support.hostinger.com\/en\/articles\/2152545-how-to-inspect-website-elements-in-your-browser\" target=\"_blank\" rel=\"noopener\">inspect<\/a> VPN traffic. Streaming services sometimes block known VPN IP ranges.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Workarounds\"><\/span>Workarounds<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Use obfuscation or stealth modes if your provider offers them; these hide VPN traffic patterns.<\/li>\n<p><\/p>\n<li>Connect over TCP 443 (<a href=\"https:\/\/www.hostinger.com\/tutorials\/what-is-ssl\" target=\"_blank\" rel=\"noopener\">https<\/a> port) to blend with regular web traffic.<\/li>\n<p><\/p>\n<li>If a service blocks VPN IPs, try a different server or a <a href=\"https:\/\/www.a2hosting.com\/kb\/a2-hosting-customer-portal\/ordering-a-dedicated-ip-address\/\" target=\"_blank\" rel=\"noopener\">dedicated ip<\/a> from your provider.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Split_tunneling_problems\"><\/span>Split tunneling problems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: apps that should use the VPN bypass it, or apps that should bypass the VPN get forced through it.<\/p>\n<p><!--KB_CAT_BLOCK--><\/p>\n<figure class=\"kb-cat-placeholder\" style=\"margin:1.75rem 0;display:block;\">\n<div class=\"kb-cat-wrap\" style=\"position:relative; overflow:hidden; border-radius:12px; box-shadow:0 10px 36px rgba(0,0,0,0.14);\"><img src=\"https:\/\/infinitydomainhosting.com\/kb\/assets\/img\/cat-default.webp\" alt=\"Common Vpn Issues in Networking and Fixes\" loading=\"lazy\" decoding=\"async\" style=\"max-width:100%;height:auto;display:block;border-radius:12px;box-shadow:0 8px 28px rgba(0,0,0,0.12);\" \/><\/p>\n<div class=\"kb-cat-gradient\" style=\"position:absolute; inset:0; background:linear-gradient(180deg, rgba(9,23,60,0.66) 0%, rgba(11,30,70,0.45) 40%, rgba(11,30,70,0.15) 100%);\"><\/div>\n<div class=\"kb-cat-textbox\" style=\"position:absolute; inset:auto 5% 7% 5%; color:#fff; text-align:center; display:flex; flex-direction:column; gap:.4rem; align-items:center; justify-content:flex-end;\">\n<div class=\"kb-cat-title\" style=\"font-weight:800; font-size:clamp(20px,3.6vw,34px); line-height:1.2; letter-spacing:.2px; text-shadow:0 1px 2px rgba(0,0,0,.35);\">Common Vpn Issues in Networking and Fixes<\/div>\n<div class=\"kb-cat-meta\" style=\"opacity:1; font-weight:600; font-size:clamp(13px,2.6vw,16px); line-height:1.45; text-shadow:0 1px 2px rgba(0,0,0,.28);\">Why VPN problems happen If a VPN doesn\u2019t behave like you expect, it\u2019s usually one of a few things: network settings, the VPN client, the server you chose, or something\u2026<\/div>\n<div class=\"kb-cat-desc\" style=\"opacity:1; font-weight:500; font-size:clamp(12px,2.4vw,15px); line-height:1.5; max-width:900px; text-wrap:balance; text-shadow:0 1px 2px rgba(0,0,0,.25);\">Computer Security<\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Fixes-2\"><\/span>Fixes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Review split tunneling rules in the VPN client , add or remove apps\/routes as needed.<\/li>\n<p><\/p>\n<li>On systems that support it, use explicit route <a href=\"https:\/\/www.hostinger.com\/tutorials\/linux-commands\" target=\"_blank\" rel=\"noopener\">commands<\/a> or profile settings to control traffic.<\/li>\n<p><\/p>\n<li>Test with simple targets (e.g., open a browser to check IP) to confirm behavior after changes.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Firewall_or_antivirus_conflict\"><\/span>Firewall or antivirus conflict<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: VPN client crashes, can&#8217;t bind to adapter, or connection is blocked at startup.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Steps_to_resolve\"><\/span>Steps to resolve<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Temporarily disable firewall\/antivirus to test whether they <a href=\"https:\/\/www.hostinger.com\/tutorials\/how-to-block-a-website-on-chrome\" target=\"_blank\" rel=\"noopener\">block the<\/a> VPN.<\/li>\n<p><\/p>\n<li>Add the VPN client or its network adapter to the firewall\u2019s allow list.<\/li>\n<p><\/p>\n<li>Ensure your firewall permits the protocol and port the VPN uses.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Routing_and_MTU_issues\"><\/span>Routing and MTU issues<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: some websites fail to load, large transfers stall, or you see fragmentation errors.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_to_try\"><\/span>What to try<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Check your routing table to confirm the default route goes through the VPN when connected (windows: route print; macOS\/Linux: netstat -rn or ip route).<\/li>\n<p><\/p>\n<li>Reduce MTU size if packets are being fragmented. Common method: test with ping to find the largest working size and adjust the VPN adapter MTU accordingly.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Client_crashes_or_freezes\"><\/span>Client crashes or freezes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>Symptoms: the app becomes unresponsive, fails to start, or behaves erratically.<\/p>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Fixes-3\"><\/span>Fixes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<ul><\/p>\n<li>Update the VPN client to the latest version.<\/li>\n<p><\/p>\n<li>Reinstall the client and remove old configuration files if necessary.<\/li>\n<p><\/p>\n<li>Check logs in the app for errors and send them to support if you can\u2019t resolve the problem yourself.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"When_to_collect_logs_and_ask_for_help\"><\/span>When to collect logs and ask for help<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>If basic steps don\u2019t help, gather information before contacting support: VPN client logs, system logs, your public IP with and without VPN, the server you tried, and the exact error messages. That saves time and leads to faster resolution.<\/p>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Platform-specific_quick_commands\"><\/span>Platform-specific quick commands<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Windows\"><\/span>Windows<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<pre><code>ipconfig \/flushdns<br \/>\nipconfig \/release<br \/>\nipconfig \/renew<br \/>\nnetsh winsock reset<\/code><\/pre>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"macOS\"><\/span>macOS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<pre><code>sudo killall -HUP mDNSResponder<br \/>\n# Restart network service via System Settings or:<br \/>\nsudo ifconfig <interface> down<br \/>\nsudo ifconfig <interface> up<\/code><\/pre>\n<p><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Linux_systemd_NetworkManager\"><\/span>Linux (systemd NetworkManager)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<pre><code>sudo systemctl restart NetworkManager<br \/>\nsudo resolvectl flush-caches<br \/>\nip route show<\/code><\/pre>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Good_practices_to_prevent_problems\"><\/span>Good practices to prevent problems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<ul><\/p>\n<li>Keep the VPN client and device OS up to date.<\/li>\n<p><\/p>\n<li>Choose reputable VPN providers with clear support and documentation.<\/li>\n<p><\/p>\n<li>Use the protocol that balances speed and reliability for your needs.<\/li>\n<p><\/p>\n<li>Test the VPN after any router or major network change.<\/li>\n<p>\n  <\/ul>\n<p><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Summary\"><\/span>Summary<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><\/p>\n<p>VPN problems usually come from network settings, the chosen server\/protocol, client software, or device-level conflicts like DNS, IPv6, or firewalls. Start with basic checks: confirm internet access, switch servers, change protocols, <a href=\"https:\/\/www.a2hosting.com\/kb\/getting-started-guide\/internet-and-networking\/clearing-the-dns-cache-on-your-computer\/\" target=\"_blank\" rel=\"noopener\">flush dns<\/a>, and test on another network. If those steps don\u2019t fix it, collect logs and contact your VPN provider with specific error details. With a methodical approach you can resolve most issues quickly.<\/p>\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Why VPN problems happen If a VPN doesn\u2019t behave like you expect, it\u2019s usually one of a few things: network settings, the&hellip;<\/p>\n","protected":false},"author":1,"featured_media":52081,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[4594,86,4593,9,1,4591,3,5,10,4,11,88,8,2],"tags":[12828,12822,10799,12831,10674,12704,10755,7789,10818,11419,1781,12705,10820,7788,12830,12832,12707,10998,1089,12833,12826,12829,12825,12823,12827,12824],"class_list":["post-52080","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-networking","category-computer-security","category-databases","category-domains","category-general","category-ip-address","category-php-scripts","category-seo","category-servers","category-ssl-certificates","category-support","category-web-hosting","category-website-security","category-wordpress","tag-authentication-failures","tag-common-vpn-issues-in-networking-and-fixes","tag-connectivity-issues","tag-dns-issues","tag-firewall","tag-ipsec","tag-latency","tag-network-security","tag-network-issues","tag-network-troubleshooting","tag-networking","tag-openvpn","tag-packet-loss","tag-remote-access","tag-routing-issues","tag-split-tunneling","tag-ssl-vpn","tag-sysadmin","tag-vpn","tag-vpn-best-practices","tag-vpn-configuration","tag-vpn-errors","tag-vpn-fixes","tag-vpn-issues","tag-vpn-performance","tag-vpn-troubleshooting"],"_links":{"self":[{"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/posts\/52080","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/comments?post=52080"}],"version-history":[{"count":1,"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/posts\/52080\/revisions"}],"predecessor-version":[{"id":52082,"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/posts\/52080\/revisions\/52082"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/media\/52081"}],"wp:attachment":[{"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/media?parent=52080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/categories?post=52080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/infinitydomainhosting.com\/kb\/wp-json\/wp\/v2\/tags?post=52080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}