{"id":20883,"date":"2025-09-08T10:50:20","date_gmt":"2025-09-08T10:50:20","guid":{"rendered":"https:\/\/www.webhosting.uk.com\/kb\/?p=20883"},"modified":"2026-03-03T11:28:19","modified_gmt":"2026-03-03T11:28:19","slug":"how-to-apply-firewall-rules-on-virtual-servers","status":"publish","type":"post","link":"https:\/\/www.webhosting.uk.com\/kb\/how-to-apply-firewall-rules-on-virtual-servers\/","title":{"rendered":"How to Apply Firewall Rules on Virtual Servers"},"content":{"rendered":"<p><em>This article applies to Hyperslice VPS and Hyperslice Cloud Servers.<\/em><\/p>\n<p>You can set firewall rules for the network interfaces of Hyperslice virtual servers.<\/p>\n<p>Important: Any rules set here will be executed before any rules configured on the software firewall installed on the server. If a rule appears not to be working, check that you do not have a conflicting rule on your server.<\/p>\n<p>There are two types of rules:<\/p>\n<p>ACCEPT \u2013 Allows traffic from the source destination(s)<br \/>\nDROP\u00a0\u2013 Blocks traffic from the source destination(s)<\/p>\n<p>Firewall rules are applied in order from\u00a0first to last, the last being the\u00a0default firewall action.<\/p>\n<p>If you only want to allow access to specific ports, set the Default firewall action to DROP and then create firewall rules for the traffic you do want to allow.<\/p>\n<h3>Adding a Firewall Rule<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-17769 size-full\" src=\"https:\/\/www.eukhost.com\/kb\/wp-content\/uploads\/2023\/02\/Pasted-19.png\" alt=\"Firewall Rule\" width=\"878\" height=\"395\" \/><\/h3>\n<ol>\n<li>Click On\u00a0Firewall Management<\/li>\n<li>Next to your Interface, enter the following:\n<ol>\n<li>Choose Accept or Block for your rule<\/li>\n<li>Source IP Address\n<ol>\n<li>Leavethe\u00a0 field empty to apply this rule to all source IPs<\/li>\n<li>Enter hyphen-separated IPs to apply the rule to an IP range (e.g. 192.168.1.1-192.168.1.10)<\/li>\n<li>Enter the IPs with a slash to apply to a CIDR\u00a0 (e.g. 192.168.1.1\/24)<\/li>\n<\/ol>\n<\/li>\n<li>Destination Port\n<ol>\n<li>Leave the field empty to apply the rule to all ports.<\/li>\n<li>Enter colon-separated ports to apply the rule to a port range (e.g. 1024:1028)<\/li>\n<li>Enter comma-separated ports to apply the rule to the list of ports (e.g. 80,443,21)<\/li>\n<\/ol>\n<\/li>\n<li>Choose the protocol (TCP, UDP or ICMP).<\/li>\n<\/ol>\n<\/li>\n<li>Click\u00a0Add Rule<\/li>\n<li>Repeat these steps to apply additional rules<\/li>\n<li>Click\u00a0Apply Firewall Rules to active you rules.<\/li>\n<\/ol>\n<h3>Re-Ordering Rules<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-17731 size-full\" src=\"https:\/\/www.eukhost.com\/kb\/wp-content\/uploads\/2023\/02\/Pasted-8.png\" alt=\"Up and Down arrow buttons\" width=\"196\" height=\"134\" \/><\/p>\n<ol>\n<li>Use the Up and\u00a0Down\u00a0arrow buttons in the left column to change firewall rule positions.<\/li>\n<\/ol>\n<h3>Setting the Default Firewall Rule<\/h3>\n<p>The default firewall rule is always processed last. Any traffic that does not match one of your firewall rules will have the default rule applied to it.<\/p>\n<p>If you want to explicitly only allow traffic you have specified in your rules, then you should set this to Drop.<\/p>\n<ol>\n<li>Set Action to Accept or Drop<\/li>\n<li>Click\u00a0Save Default Firewall Rules<\/li>\n<li>Click\u00a0Apply Firewall Rules<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-17732 size-full\" src=\"https:\/\/www.eukhost.com\/kb\/wp-content\/uploads\/2023\/02\/Pasted-9.png\" alt=\"Apply Firewall Rules\" width=\"669\" height=\"172\" \/><\/p>\n<p>By applying and ordering firewall rules correctly, you can control network access to your Hyperslice virtual servers and improve overall security. Always review rule order and default actions to ensure traffic is handled as expected.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This article applies to Hyperslice VPS and Hyperslice Cloud Servers. You can set firewall rules for the network interfaces of Hyperslice virtual servers. Important: Any rules set here will be&hellip;<\/p>\n<p><a href=\"https:\/\/www.webhosting.uk.com\/kb\/how-to-apply-firewall-rules-on-virtual-servers\/\" class=\"more-link\">Read More<\/a><\/p>\n<div class='heateorSssClear'><\/div><div  class='heateor_sss_sharing_container heateor_sss_horizontal_sharing' data-heateor-sss-href='https:\/\/www.webhosting.uk.com\/kb\/how-to-apply-firewall-rules-on-virtual-servers\/'><div class='heateor_sss_sharing_title' style=\"font-weight:bold\" >Spread the love<\/div><div class=\"heateor_sss_sharing_ul\"><a aria-label=\"Facebook\" class=\"heateor_sss_facebook\" href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https%3A%2F%2Fwww.webhosting.uk.com%2Fkb%2Fhow-to-apply-firewall-rules-on-virtual-servers%2F\" title=\"Facebook\" rel=\"nofollow noopener\" target=\"_blank\" style=\"font-size:32px!important;box-shadow:none;display:inline-block;vertical-align:middle\"><span class=\"heateor_sss_svg\" style=\"background-color:#0765FE;width:40px;height:40px;display:inline-block;opacity:1;float:left;font-size:32px;box-shadow:none;display:inline-block;font-size:16px;padding:0 4px;vertical-align:middle;background-repeat:repeat;overflow:hidden;padding:0;cursor:pointer;box-sizing:content-box\"><svg style=\"display:block;\" focusable=\"false\" aria-hidden=\"true\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"100%\" height=\"100%\" viewBox=\"0 0 32 32\"><path fill=\"#fff\" d=\"M28 16c0-6.627-5.373-12-12-12S4 9.373 4 16c0 5.628 3.875 10.35 9.101 11.647v-7.98h-2.474V16H13.1v-1.58c0-4.085 1.849-5.978 5.859-5.978.76 0 2.072.15 2.608.298v3.325c-.283-.03-.775-.045-1.386-.045-1.967 0-2.728.745-2.728 2.683V16h3.92l-.673 3.667h-3.247v8.245C23.395 27.195 28 22.135 28 16Z\"><\/path><\/svg><\/span><\/a><a aria-label=\"X\" class=\"heateor_sss_button_x\" href=\"https:\/\/twitter.com\/intent\/tweet?text=How%20to%20Apply%20Firewall%20Rules%20on%20Virtual%20Servers&url=https%3A%2F%2Fwww.webhosting.uk.com%2Fkb%2Fhow-to-apply-firewall-rules-on-virtual-servers%2F\" title=\"X\" rel=\"nofollow noopener\" target=\"_blank\" style=\"font-size:32px!important;box-shadow:none;display:inline-block;vertical-align:middle\"><span class=\"heateor_sss_svg heateor_sss_s__default heateor_sss_s_x\" style=\"background-color:#2a2a2a;width:40px;height:40px;display:inline-block;opacity:1;float:left;font-size:32px;box-shadow:none;display:inline-block;font-size:16px;padding:0 4px;vertical-align:middle;background-repeat:repeat;overflow:hidden;padding:0;cursor:pointer;box-sizing:content-box\"><svg width=\"100%\" height=\"100%\" style=\"display:block;\" focusable=\"false\" aria-hidden=\"true\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 32 32\"><path fill=\"#fff\" d=\"M21.751 7h3.067l-6.7 7.658L26 25.078h-6.172l-4.833-6.32-5.531 6.32h-3.07l7.167-8.19L6 7h6.328l4.37 5.777L21.75 7Zm-1.076 16.242h1.7L11.404 8.74H9.58l11.094 14.503Z\"><\/path><\/svg><\/span><\/a><a aria-label=\"Linkedin\" class=\"heateor_sss_button_linkedin\" href=\"https:\/\/www.linkedin.com\/sharing\/share-offsite\/?url=https%3A%2F%2Fwww.webhosting.uk.com%2Fkb%2Fhow-to-apply-firewall-rules-on-virtual-servers%2F\" title=\"Linkedin\" rel=\"nofollow noopener\" target=\"_blank\" style=\"font-size:32px!important;box-shadow:none;display:inline-block;vertical-align:middle\"><span class=\"heateor_sss_svg heateor_sss_s__default heateor_sss_s_linkedin\" style=\"background-color:#0077b5;width:40px;height:40px;display:inline-block;opacity:1;float:left;font-size:32px;box-shadow:none;display:inline-block;font-size:16px;padding:0 4px;vertical-align:middle;background-repeat:repeat;overflow:hidden;padding:0;cursor:pointer;box-sizing:content-box\"><svg style=\"display:block;\" focusable=\"false\" aria-hidden=\"true\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"100%\" height=\"100%\" viewBox=\"0 0 32 32\"><path d=\"M6.227 12.61h4.19v13.48h-4.19V12.61zm2.095-6.7a2.43 2.43 0 0 1 0 4.86c-1.344 0-2.428-1.09-2.428-2.43s1.084-2.43 2.428-2.43m4.72 6.7h4.02v1.84h.058c.56-1.058 1.927-2.176 3.965-2.176 4.238 0 5.02 2.792 5.02 6.42v7.395h-4.183v-6.56c0-1.564-.03-3.574-2.178-3.574-2.18 0-2.514 1.7-2.514 3.46v6.668h-4.187V12.61z\" fill=\"#fff\"><\/path><\/svg><\/span><\/a><\/div><div class=\"heateorSssClear\"><\/div><\/div><div class='heateorSssClear'><\/div>","protected":false},"author":28,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1847],"tags":[],"class_list":["post-20883","post","type-post","status-publish","format-standard","hentry","category-virtual-server"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.9 (Yoast SEO v27.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Applying Firewall Rules in Linux<\/title>\n<meta name=\"description\" content=\"Ensure robust security for your system by mastering the application of firewall rules. 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