HI All; Squid integration with AD kerberos auth was working properly for me. Today faced issue, as users are getting login prompt while accessing Proxy. Not sure what went wrong. here is my configuration and also cache.log o/p. Need urgent help.
============================================================== # # Recommended minimum configuration: #### AD SSO Integration ##### auth_param negotiate program /usr/lib64/squid/squid_kerb_auth -s HTTP/proxy02.abcd.gov...@abcd.gov.eu -d auth_param negotiate children 10 auth_param negotiate keep_alive on #auth_param basic credentialsttl 2 hours acl ad_auth proxy_auth REQUIRED #### AD Group membership #### external_acl_type AD_Group ttl=300 negative_ttl=0 %LOGIN /usr/lib64/squid/squid_ldap_group -P -R -b "DC=ABCD,DC=GOV,DC=EU" -D svcproxy -W /etc/squid/pswd/pswd -f "(&(objectclass=person)(userPrincipalName=%v)(memberof=cn=%a,ou=InternetAccess,ou=Groups,dc=ABCD,dc=GOV,dc=EU))" -h ABCD.GOV.EU -s sub -v 3 -d acl AVWSUS external AD_Group lgOnlineUpdate acl windowsupdate dstdomain "/etc/squid/sitelist/infra_update_site" acl manager proto cache_object acl localhost src 127.0.0.1/32 ::1 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 # Example rule allowing access from your local networks. # Adapt to list your (internal) IP networks from where browsing # should be allowed acl AVSRVR src xx.xx.8.123 # Cloud SEPM Server acl localnet src 10.0.0.0/8 # RFC1918 possible internal network acl localnet src 172.16.0.0/12 # RFC1918 possible internal network acl localnet src 192.168.0.0/16 # RFC1918 possible internal network acl localnet src fc00::/7 # RFC 4193 local private network range acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines # acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT # Recommended minimum Access Permission configuration: # # Only allow cachemgr access from localhost http_access allow manager localhost http_access deny manager # Deny requests to certain unsafe ports http_access deny !Safe_ports # Deny CONNECT to other than secure SSL ports http_access deny CONNECT !SSL_ports # We strongly recommend the following be uncommitted to protect innocent # web applications running on the proxy server who think the only # one who can access services on "localhost" is a local user #http_access deny to_localhost # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS # # Example rule allowing access from your local networks. # Adapt localnet in the ACL section to list your (internal) IP networks # from where browsing should be allowed http_access allow AVSRVR windowsupdate http_access allow AVWSUS windowsupdate http_access deny all http_access allow ad_auth # And finally deny all other access to this proxy http_access deny all # Squid normally listens to port 3128 http_port 8080 never_direct allow all cache_peer x.x.2.108 parent 8080 0 default dns_nameservers x.x.2.108 # We recommend you to use at least the following line. #hierarchy_stoplist cgi-bin ? # Uncomment and adjust the following to add a disk cache directory. cache_dir ufs /var/spool/squid 2048 16 256 # Leave coredumps in the first cache dir coredump_dir /var/spool/squid # Log forwarding to SysLog access_log syslog:local1.info squid # Add any of your own refresh_pattern entries above these. refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 ================================================== Cache.log- ==================================== 2016/07/21 14:52:53| squid_kerb_auth: ERROR: gss_accept_sec_context() failed: Unspecified GSS failure. Minor code may provide more information. 2016/07/21 14:52:53| authenticateNegotiateHandleReply: Error validating user via Negotiate. Error returned 'BH gss_accept_sec_context() failed: Unspecified GSS failure. Minor code may provide more information. ' =================================== Also observed Squid_ldap_group helper throwing ERR when checking user group membership. but user is part of the said group in AD. ======================================================================== #/usr/lib64/squid/squid_ldap_group -P -R -b "DC=ABCD,DC=GOV,DC=EU" -D svcproxy -W /etc/squid/pswd/pswd -f "(&(objectclass=person)(userPrincipalName=%v)(memberof=cn=%a,ou=InternetAccess,ou=Groups,dc=ABCD,dc=GOV,dc=EU))" -h ABCD.GOV.EU -s sub -v 3 -d 853438 lgOnlineUpdate Connected OK group filter '(&(objectclass=person)(userPrincipalName=853438)(memberof=cn=lgOnlineUpdate,ou=InternetAccess,ou=Groups,dc=ABCD,dc=GOV,dc=EU))', searchbase 'DC=ABCD,DC=GOV,DC=EU' ERR ========================================== Thanks & Regards Nilesh Suresh Gavali =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. 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