{"id":22428,"date":"2022-12-22T02:08:19","date_gmt":"2022-12-22T02:08:19","guid":{"rendered":"https:\/\/nsfocusglobal.com\/?p=22428"},"modified":"2026-04-17T18:07:42","modified_gmt":"2026-04-17T18:07:42","slug":"introduction-to-nsfocus-waf-web-decoding-function","status":"publish","type":"post","link":"https:\/\/nsfocusglobal.com\/pt-br\/introduction-to-nsfocus-waf-web-decoding-function\/","title":{"rendered":"Introduction to NSFOCUS WAF Web Decoding Function"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><p>WAF web decoding function can decode base64-encoded data. After that, WAF performs attack detection by identifying attack signatures and provides prevention. The web decoding function is configured per website.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Web Decoding Configuration<\/strong><\/h2>\n\n\n\n<p>Step 1. Choose<strong> Security Management<\/strong> &gt;<strong> Website Protection<\/strong>, select a website group, click <strong>Web Decoding<\/strong>, and then click <strong>Create<\/strong> in the upper-right corner of the page.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/1-3.png\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"500\" src=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/1-3-1024x500.png\" alt=\"Red circular no entry sign with a white horizontal bar.\" class=\"wp-image-22437\" srcset=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/1-3-1024x500.png 1024w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/1-3-300x146.png 300w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/1-3-768x375.png 768w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/1-3-1536x750.png 1536w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/1-3-600x293.png 600w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/1-3.png 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p>Step 2. Edit the policy.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Policy Name: is user-defined.<\/li><li>Decoding Mode: click the Add icon to add decoding modes and the Delete icon to delete decoding modes. A maximum of ten decoding modes can be added. Currently, only base64 decoding is supported, and later more decoding modes will be supported.<\/li><li>Protocol: HTTP or HTTPS.<\/li><li>URI_Path: does not include the resource file name, and must start with a slash (\/). The following match options are supported: equal to, inclusive, and regular expression.<\/li><li>Parameter: indicates the parameter name. The following match options are supported: equal to, inclusive, and regular expression.<\/li><\/ul>\n\n\n\n<p>Note that every website can be configured with a maximum of 100 decoding policies. A policy can be configured with a maximum of 30 parameters.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Testing Case<\/strong><\/h2>\n\n\n\n<p>Step 1. Construct a test character string and encode it with the base64 algorithm.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/4-1.png\"><img decoding=\"async\" width=\"613\" height=\"329\" src=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/4-1.png\" alt=\"Red circular no entry sign with a white horizontal bar.\" class=\"wp-image-22429\" srcset=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/4-1.png 613w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/4-1-300x161.png 300w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/4-1-600x322.png 600w\" sizes=\"(max-width: 613px) 100vw, 613px\" \/><\/a><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/5-2.png\"><img decoding=\"async\" width=\"611\" height=\"231\" src=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/5-2.png\" alt=\"Red circular no entry sign with a white horizontal bar.\" class=\"wp-image-22435\" srcset=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/5-2.png 611w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/5-2-300x113.png 300w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/5-2-600x227.png 600w\" sizes=\"(max-width: 611px) 100vw, 611px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p>Step 2. Assign the base64-encoded character to a parameter.<\/p>\n\n\n\n<p>Take the parameter name NSFOCUS as an example.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/6-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"611\" height=\"355\" src=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/6-1.png\" alt=\"Red circular no entry sign with a white horizontal bar.\" class=\"wp-image-22431\" srcset=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/6-1.png 611w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/6-1-300x174.png 300w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/6-1-600x349.png 600w\" sizes=\"(max-width: 611px) 100vw, 611px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p>Step 3. Edit the web decoding policy.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/7-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"601\" height=\"450\" src=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/7-1.png\" alt=\"Red circular no entry sign with a white horizontal bar.\" class=\"wp-image-22439\" srcset=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/7-1.png 601w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/7-1-300x225.png 300w\" sizes=\"(max-width: 601px) 100vw, 601px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p>Step 4.&Acirc;&nbsp; Perform the decoding.<\/p>\n\n\n\n<p>The parameter value is successfully decoded and intercepted by WAF SQL injection protection module.<\/p>\n\n\n\n<p>Protection logs can be viewed under <strong>Logs &amp; Reports<\/strong>&Acirc;&nbsp;&gt;&Acirc;&nbsp;<strong>Security Protection Logs<\/strong>&Acirc;&nbsp;&gt;&Acirc;&nbsp;<strong>Web Security Logs<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/8.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"500\" src=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/8-1024x500.png\" alt=\"Red circular no entry sign with a white horizontal bar.\" class=\"wp-image-22441\" srcset=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/8-1024x500.png 1024w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/8-300x146.png 300w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/8-768x375.png 768w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/8-1536x750.png 1536w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/8-600x293.png 600w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/8.png 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/9.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"500\" src=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/9-1024x500.png\" alt=\"Red circular no entry sign with a white horizontal bar.\" class=\"wp-image-22443\" srcset=\"https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/9-1024x500.png 1024w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/9-300x146.png 300w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/9-768x375.png 768w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/9-1536x750.png 1536w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/9-600x293.png 600w, https:\/\/nsfocusglobal.com\/wp-content\/uploads\/2022\/12\/9.png 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/div><\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p>WAF web decoding function can decode base64-encoded data. After that, WAF performs attack detection by identifying attack signatures and provides prevention. The web decoding function is configured per website. Web Decoding Configuration Step 1. Choose Security Management &gt; Website Protection, select a website group, click Web Decoding, and then click Create in the upper-right corner [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":35729,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[21],"tags":[487],"class_list":["post-22428","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-waf","tag-knowledge-base"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Introduction to NSFOCUS WAF Web Decoding Function - NSFOCUS<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Introduction to NSFOCUS WAF Web Decoding Function - NSFOCUS\" \/>\n<meta property=\"og:description\" content=\"WAF web decoding function can decode base64-encoded data. 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