Hi, Running squid-2.6STABLE-6.el5 (RHEL5) here. Trying to configure NTLM authentication. I successfully configured krb/samba and have verified successful authentication using: $ /usr/bin/ntlm_auth --username=jbaird password: NT_STATUS_OK: Success (0x0) I can also enumerate groups and users successfully using "wbinfo -u" and "wbinfo -g" However, when I add the squid-2.5-basic helper to ntlm_auth, I receive "ERR": $ /usr/bin/ntlm_auth --helper-protocol=squid-2.5-basic na+jbaird <password> ERR I believe this is causing my squid configuration to fail: <snip> # NTLM configuration auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 30 acl NTLMUsers proxy_auth REQUIRED http_access allow all NTLMUsers </snip> Does anyone have any tips on how to troubleshoot? Should I be using a different helper-protocol for ntlm_auth? Thanks, Josh