Squid proxy regular expression txt" ident_regex This acl permits the use of regular expressions with usernames. The reason is that squid can't see the full URL for HTTPS requests, only the domain. If i access a To create a filter that uses an expression, click on the target categories tab and either create a new category or edit an existing one. After running squid3 -k parse squid says there is no problem, and if an user is trying to access to an alternative Facebook link such as (for instance): test. facebook\. Jul 25, 2020 · In this first part we can disable the rule by checking the Disabled box, we put a name, the order, which clients are affected depending on all the options it gives us, in this case the ips range 192. com$ http_access deny denylist http_access allow all I know what's wrong with my regex. You have to do a dstdomain for HTTPS connections. 0. facebook. 1 in ubuntu machine. *facebook\. 10-192. demo. Redirect blocked URLs to an info page. " I couldn't find what's the current regex engine used in Squid. 4 We restart squid ~# systemctl restart squid. regex101. Hi everyone, I'm trying to deny all urls except for only whitelisted regular expressions. I adapted this for testing and set it to stare all because of this statement on their website, "The following configuration obtains SNI by parsing TLS Client Hello (due to a matching peek rule at step1) and then either splices bank connections OR stares at the TLS Server Hello (due to a matching stare rule) and bumps non-bank connections (due to the default bump-after-stare rule). Sep 25, 2017 · The problem was in the regex I was using. Which can help you craft desired regular expression for use within redirector. Improve this question. com which is a testing environment. The focus will be on using Squid to control which domains are accessible to a user, either through blacklisting or whitelisting. Sometimes we’ve found out that, when using the proxy it’s trying to access the same link via IP address, however, if we replace the IP address with the correct domain name, the link will work correctly, in this situation, we need to create a URL rewrite/redirect rule Squid is a very powerful proxy server. yahoo. Transparent HTTP proxy: ticked; Transparent Aug 29, 2022 · But I want allow squid user to access test. Nov 27, 2015 · I have problem with regex used in blocking URLS in Squid. URLs matching Python regular expressions can be redirected using regular expression substitution, databases of filename-to-url mappings, alternative config files, or child redirectors. mpeg$ \. q3d q3d. It's down to the way proxy CONNECT works and not a Squid issue. I configured acl like below. Enter the expression you want to filter on in the expression box and then click save. Installing Squid and squidGuard¶ How to Restrict Web Access By Time Using Squid Proxy Server on CentOS 6. my squid. Extended reading. regular-expression; proxy; web; squid; https; Share. txt" http_access deny porn porn. The first option defines an access control list using the whitelist file. # Match the most common video files extensions acl movies urlpath_regex -i \. avi$ \. Oct 17, 2019 · Introduction Squid is a web proxy with caching and forwarding capabilities, however, this post will not be concerned with caching web content. conf: acl white /etc/squid/whitelist redirector_access white deny. To configure the whitelist in squid, two extra options are needed in /etc/squid. com the proxy refuses the connection. gourmet-chef. Enforce the use of domain names/prohibit the use of IP addresses in URLs. 1 (28 Feb 2023), GNUregex has been removed by this pull request. Squid can use regular expressions to filter URLs matching specific patterns (url_regex type); if you don't care about the URL-type and the hostname, you can use the urlpath_regex type instead. *\. php. ” Note that when IP addresses are used in URLs (instead of domain names), Squid may have to do a DNS lookup to determine whether the ACL matches: If a domain name for the IP address is already in the Squid’s “FQDN cache”, then Squid can immediately compare the destination domain against the Feb 6, 2023 · @jonathanlee. Can be used to provide access control based on parts of the URL or a case insensitive match of the URL, and much more. . com and now squid is stopping the URLs. Changed the regex with this one: \b(iphone|prod)\b. Transparent Proxy Settings. * ^. prod. com\. This can be useful for blocking undesired domains, such as those associated with malware or advertisements. Print Go Up Pages 1 May 2, 2014 · Use Alternate DNS servers for proxy: unticked; You can if needed select additional interfaces by holding down shift key whilst selecting interfaces. You can do a url_regex only for HTTP connections. Description: "Modern operating systems provide a functioning regex library, so we don't need to carry one anymore. mov$ # Match JPG images from URLs Matches using a regular expression on the complete URL. I have only this regular expression in my file "squid_sites. I feel like I have a good grasp on most of this, but the inclusion of HTTPS is confusing me and regular expressions are, well, not really regular at all LOL. pyredir is a flexible but simple redirector for Squid implemented in Python. redtube. The safe search option doesn't filter out all I want it to unfortunately. Nov 10, 2023 · Block access to URLs matching a list of regular expressions or words for some users. com; regexr. 131 1 1 gold badge 1 1 silver badge 5 5 Feb 17, 2016 · I've got working regex's but the problem seems to be that the squid reverse proxy regex input does not accept negative lookahead. acl porn url_regex "/etc/squid3/porn. *domain\. 168. com problem is that this is REGEX rule, and at this point it means, that Squid will be block all URLs containing same letters for example Jan 1, 2017 · The proxy server Squid (Squid Web Proxy Cache) has the ability to read a list of ips from a text file and block those ips from clients using the proxy. I decided to design a regular expression (regex) to parse these URLs and block them. 5 Now we should be able to see the redirector in action. This is perfect for blocking ad servers for your internal clients. acl aclname url_regex [-i] pattern Feb 25, 2025 · The dstdomain means to search the hostname in the URL for the string “www. On the other Jul 5, 2013 · I am using squid proxy 3. Mar 15, 2015 · For anyone else like me that stumbles across this post looking for an answer. Follow asked Mar 15, 2015 at 19:35. The regular expressions used in Squid are provided by the GNU Regex library which is documented in the section 7 and 3 regex manpages. asf$ \. Have different access rules based on time of day, day of the week, date etc. Squid regex use GNU regex (see serverfault question) and GNU regex can not understand (?!. domain. 1. sex. conf: acl denylist dstdom_regex ^(?!. Then go back to the common or group ACL tab and select the action (deny, allow, etc. Regular expression – Wikipedia; Bonus Online regular expression testers. For some reasons, when using squid proxy, some apps/websites/url/link doesn’t work or can’t load correctly. It can filter traffic based on time, regular expressions on path/URI, source and destination IP addresses, domain, browser, authenticated user name, MIME type, and port number (protocol). Mar 1, 2022 · As of the release of squid-6. * The patterns match against the domain name: dstdom_regex means destination (server) regular expression pattern matching. Redirect banners to an empty GIF. acl writers proxy_auth_regex ^writer Extended ACL Lists Mar 20, 2013 · In short, I want to filter HTTPS with squid and squidguard, and get rid of google search images for certain ip groups. 3; How to Setup Squid Proxy Service on Matches using a regular expression on the complete URL. com; www . Acl for dstdomain is working fine. I want to allow only urls matching our pattern through our proxy server. I personally only use squid on my VPN interface preferring to keep my LAN connection clear of any filtering or encryption. In this example all usernames that start with student. com . in squid conf the whitelist is configured to first allow then the blacklist comes, so you don't need to manually edit the squid conf file. Utilities are provided for generating database files from file archives. ident_regex: regular expression pattern matching on the user's name; src_as: source (client) Autonomous System number; dst_as: destination (server) Autonomous System number; proxy_auth: user authentication via external processes; proxy_auth_regex: user authentication via external processes; snmp_community: SNMP community string matching Dec 28, 2019 · chmod +x /etc/squid/redirect. *games. " Oct 25, 2022 · The Issue. ) for your target category. mpg$ \. 20 that belongs to Technical Service in the Daytime schedule previously created. com. Mar 1, 2007 · With the whitelist maintained by squid, a much faster squid reload (re-reading the configuration file) is all that is required. I don't want to block all facebook URLs but only alternatives. The below regex working as expected for the server that should catch "/cloud", "/cloud/", "/cloud/ " and so on. *youtube\. acl student ident_regex ^student proxy_auth_regex When you use proxy_auth_regex you will be able to target users for special needs. I probably forgot some features, but it can be hard to cover the entire list right here. acl aclname url_regex [-i] pattern Jul 16, 2024 · squid-proxy installtion & configuration → proxy_auth_regex: regular expression pattern matching on user authentication via external processes; snmp_community: SNMP community string matching; Mar 11, 2018 · The above regex will match everything. 2; 14 Tips to Easily Optimize Nginx Performance on Ubuntu; How to Setup Squid Proxy Server on Google Cloud Platform (GCP) How to Install and Configure Squid Proxy Server on Fedora 16; How to Setup Squid Proxy Server on Linux CentOS 6. wmv$ \. Jul 7, 2016 · I have several proxy rule files for Squid, and all contain rules like: acl blacklisted dstdom_regex ^. *(demo)). txt looks like that. syc oultlq ccte qiisaaf nku nmatag weja wyfqv mwxl eacgt dxdghrg iphud lrgor trce dudvj