Hello, the user I enter for authentication is a on-domain user account. And basically it does work, because eventually, after hitting the "OK" button six times, I am successfully authenticated. I just can't figure out why this only happens on IE, with Firefox I enter the credentials once and everything works fine. No, I'm testing with IE9, not 11. Regards Mana -----Ursprüngliche Nachricht----- Von: Amos Jeffries [mailto:squid3@xxxxxxxxxxxxx] Gesendet: Dienstag, 17. Juni 2014 08:33 An: squid-users@xxxxxxxxxxxxxxx Betreff: Re: AW: Squid 3.3.8 NTLM problems On 17/06/2014 5:45 p.m., Manfred Mayer IT wrote: > Hello, > > thanks for your suggestions on the config, I changed the lines as you proposed. But I'm still having the issue with the multiple popups at first logon with IE. Do you have any idea to this? > > Thanks and regards > Mana It is worth being aware of several things: * NTLM is a domain-based protocol, it can only be used with on-domain computers or user accounts. * that NTLM protocol was officialy deprecated by MS back in 2006. * that all MS software written since then has preferred Kerberos and at most allowed falback to NTLMv2. * NTLMv2 is not able to be used by any non-domain machine. So the problem is to find out why the non-domain machines are not correctly using Basic authentication (not having on-domain NTLM credentials to use). BTW, is IE 11 being used or something older? Amos Email secured by [Rapunzel IT] Rapunzel Naturkost GmbH, Rapunzelstraße 1, D-87764 Legau Registergericht Memmingen HRB 14736 | Sitz der Gesellschaft: Legau Ust Id Nr. DE 129088402 Geschäftsführer: Joseph Wilhelm | Margit Epple | Andreas Wenning Telefon: +49 (0)8330 / 529 - 0