Hello, Thank You for your answer. I know that its off topic now, but can you get me some directions how this can be done? Thank You 2013/1/10 Eliezer Croitoru <eliezer@xxxxxxxxxxxx>: > Hey Franisek, > > This is no squid problem. > since it's intercept proxy the client tries to do a dns lookup for the > www.example.com but since it dosn't have any way to get the dns result for > this domain it shows the client the problem it has. > Firefox dont know to what IP send the requests. > In this situation the client dont even send a request at all that squid can > intercept. > > Handle this kind of network issues in another level then squid\application. > > Regards, > Eliezer > > > On 1/10/2013 3:11 PM, Frantisek Remias wrote: >> >> OK, the problem is that it still show browser default error message >> like before when the domain cannot be resolved >> >> The error message is like >> >> "Server not found. Check if the address for typing errors such as >> ww.example.com of www.example.com" in firefox. >> >> I need to show custom page instead of this browser default page when >> there is no internent connection >> >> 2013/1/10 Amos Jeffries <squid3@xxxxxxxxxxxxx> >>> >>> >>> On 10/01/2013 9:38 p.m., Frantisek Remias wrote: >>>> >>>> >>>> Hello, >>>> >>>> thank you for the response. >>>> >>>> If I set the browser to use proxy a there is temporarily no internet >>>> connection..then it shows the custom page (the ERR_DNS_FAIL one). BTW: >>>> Is it possible to define another custom page when the internet >>>> connection is not available (so it will shows different one when there >>>> is DNS problem and another if internet connection is unavailable?) >>> >>> >>> >>> How is Squid to know about connection unavailable? It is not making a >>> connection, just doing DNS lookup at this point to determine where the >>> connection might go in future. It is entirely possible (and normal) that >>> routing make the DNS go through one upstream link and HTTP packets >>> through >>> another. >>> >>> >>>> If I dont set the browser to use proxy (meaning it will use >>>> transparent mode proxy). It shows default browser error message like >>>> "Internet Explorer cannot display the webpage" or "Server not >>>> found...Firefox cant found the server at www.".... in firefox. What I >>>> need is to show the squid custom page in this case there isnt internet >>>> connection available >>> >>> >>> >>> Interfaces these days offer scripted hooks. So... >>> >>> You configure Squid with: >>> http_port 3128 intercept name=port1 >>> http_port 3129 intercept name=port2 >>> acl port2 myportname port2 >>> deny_info ERR_CUSTOM port2 >>> http_access deny port2 >>> >>> Then you make a script which changes the iptables rules sending traffic >>> to >>> port #2 of Squid when the link goes down and sending traffic to port #1 >>> of >>> Squid when it goes up. >>> >>> Amos
