Hello, I am implementing customized error messages based on this information: http://wiki.squid-cache.org/Features/CustomErrors I have some problems though: 1. Is there any way to find out the proxy server's ip address that handled the request? At the beginning I thought it was %I, but now I think this refers to the http server, not the proxy server. I am aware of %L, but I would rather not use that. 2. The %o tag (message returned by external acl helper) is not url-unescaped, so the error message reads: bla+bla+bla. Best regards, Alan