Optional argument specifies the digest algorithm to use. The SHA1 digest algorithm is the default and is currently the only algorithm supported -sha1. The "none" name can be used to match transactions where the ACL could not compute the server name using any information source that was both available and allowed to be used by the ACL options at the ACL evaluation time. An ACL option below may be used to restrict what information sources are used to extract the server names from: --client-requested The server name is SNI regardless of what the server says.
If the server certificate is unavailable, then the name is "none". When the server certificate is unavailable, the consensus server name is SNI. Combining multiple options in one ACL is a fatal configuration error. All sources used by the master transaction in the past are considered by the ACL. Caching currently does not affect these rules. The source of the cached response does not have any effect on future transaction that use the cached response without revalidation.
This may change. ENDIF acl aclname any-of acl1 acl ACLs from multiple any-of lines with the same name are ORed. You can't give the same name to two different types of ACL elements. It will generate a syntax error. You can put different values for the same ACL name on different lines. Squid combines them into one list. This is the primary access control list. Notes : An access list rule consists of an allow or deny keyword, followed by a list of ACL element names.
An access list consists of one or more access list rules. Access list rules are checked in the order they are written. List searching terminates as soon as one of the rules is a match. In other words, all ACL elements of the rule must be a match in order for the rule to be a match. This means that it is possible to write a rule that can never be matched.
For example, a port number can never be equal to both 80 AND at the same time. If none of the configured rules match, then Squid reverses the action of the last configured rule. Consult directive-specific documentation for that directive default behavior.
Relying on these implicit defaults is dangerous because Squid action may "unexpectedly" change when you add or remove the last configured rule. It is best to end your rules with an explicit rule that will match any transaction. For example: acl myclients src As an example, we will assume that you would like to prevent users from accessing cooking recipes. One way to implement this would be to deny access to any URLs that contain the words "cooking" or "recipe.
Note that these regular expressions are case-sensitive, so a url containing "Cooking" would not be denied. Another way is to deny access to specific servers which are known to hold recipes. For example: acl Cooking2 dstdomain www. Subsequent ACL evaluations may be able to use the cached lookup result if any.
If a directive does not support a required asynchronous DNS lookup, then modern Squids use "none" instead of the actual domain name to determine whether a dstdomain ACL matches, but you should not rely on that behavior. Using Ident You can use ident lookups to allow specific users access to your cache.
This requires that an ident server process runs on the user's machine s. In your squid. This does not directly alter access to the users request.
Is there a way to do ident lookups only for a certain host and compare the result with a userlist in squid. Additionally, if you use a ident ACL in squid. However, Squid does not wait for the lookup to complete unless the ACL rules require it.
Consider this configuration: acl host1 src However, requests from Using Proxy Authentication Another option is to use proxy-authentication. In this scheme, you assign usernames and passwords to individuals. When they first use the proxy they are asked to authenticate themselves by entering their username and password.
In Squid this authentication is handled via external processes. Do you have a CGI program which lets users change their own proxy passwords? All elements of an access entry are AND'ed together e.
This is impossible because any IP address could only match one or the other. This should instead be rewritten as: acl ME src You rather wanted to deny access to non-members. This is the correct example:. Since dummy is a static ACL that always matches and has nothing to do with authentication you will find that the access is just denied.
I downloaded a definition of list in squidblacklist. One of the example I download is squid-torrent. This is my squid.
Help, how to fix this error, I like using a list of definition, because its easy for me to download from the web for the list, instead of searching all torrent site and add-in to my blockesite list. After, checking and removing the duplicate of acl list in my squid-torrent. Access control configuration prevents your request from being allowed at this time.
Please contact your service provider if you feel this is incorrect. How come, isohunt, torrentz. A higher level of Quality in a blacklist that trumps the competition, we carry multiple ports, including SquidGuard and DansGuardian compatible formats. We are the worlds leading publisher of blacklists tailored for Squid proxy. We also carry Squid Native ACL format for those whom do not wish to use third party plugins, upstream proxies or helpers to achieve filtering.
Thanks for this info. I just recently installed squid on my Windows OS. I have created several ACL rules and it worked fine. However, I wanted to extensively filter the organization. I created several groups defined by their mac addresses.
Whereas, level1 — can access all sites, level2 can access all sites except youtube and facebook, level3 — some sites defined on ACL and the rest not defined should not be allowed. I discovered that if someone changed their ip address manually, they can bypass web filtering. I need help on this one. Thanks in advance. I have figured out how to remove referer from header for request going to a destination, as under.
Is it possible to deny this selectively for sites originating the referer? Example — referrer should be stripped for xyz. Thanks for this great tutorial. The following three examples are all acceptable to squid. Squid will try to calculate the subnet if it is not included, however, it is a good practice to add the correct subnet when the acl is written.
One of the problems of using dst is that it must make a host lookup before it can process the request and this may take too long. Better to use dstdomain. This type is useful only when squid will use several ip addresses. It is used to indicate which ip address for squid to use. This may be very useful for setting up squid so that it will listen on two separate networks with different ip addresses.
These types use domain names. Be careful with domain names because of the difference between domain names and subdomains. The dst type only checks the domain one time, so that if it changes you will not have the correct information. However, when using dstdomain, squid will check it every time it is accessed, which is a safer situation. If a domain is not configured correctly, then it will not be able to complete the reverse lookup and fail.
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