On Thu, 17 Sep 2015 03:00:56 +1200 Amos Jeffries <squid3@xxxxxxxxxxxxx> wrote: > On 17/09/2015 12:37 a.m., Marko Cupać wrote: > > Hi, > > > > I'm trying to setup squid in a way that it authenticates users via > > kerberos and grants different levels of web access according to ldap > > query of MS AD groups.After some trials and errors I have found acl > > order which apparently does not trigger reauthentication (auth > > dialogues in browsers although I don't even provide basic auth). > > What makes you think browser dialog box has anything to do with Basic > auth? All it means is that the browser does not know what credentials > will work. The ones tried (if any) have been rejected with a challenge > response (401/407) for valid ones. It may be the browser password > manager. > > If you are using only Kerberos auth then users enter their Kerberos > username and password into the dialog to allow the browser to fetch > the Kerberos token (or keytab entry) it needs to send to Squid. > > > > Here's relevant part: > > > > http_access deny !Safe_ports > > http_access deny CONNECT !SSL_ports > > http_access allow localhost manager > > http_access deny manager > > http_access deny to_localhost > > # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS > > http_access deny !auth all > > http_access allow !basic_domains !basic_extensions basic_users > > http_reply_access allow !basic_mimetypes basic_users > > http_access allow !advanced_domains !advanced_extensions > > advanced_users http_access allow expert_users all > > # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS > > http_access allow localhost > > http_access deny all > > > > I'd like to know which acl triggered the ban, so I've created custom > > error page: > > > > error_directory /usr/local/etc/squid/myerrors > > deny_info ERR_BASIC_EXTENSION basic_extensions > > > > The problem is that my custom error page does not trigger when I > > expect it to (member of basic_users accessing URL with extension > > listed in basic_extensions) - ERR_ACCESS_DENIED is triggered > > instead. I guess this is because of last matching rule which is > > http_access deny all. > > Perhapse. > > But, basic_extensions is never the last listed ACL in a denial rule. > There is never a deny action associated with the ACL. That is why the > deny_info response template is not being used. > > > > > Is there another way how I can order acls so that I don't trigger > > reauthentication while triggering deny_info? > > Not without the ACL definition details. > > Amos Hi Amos, thank you for looking into this. Here's complete squid.conf (I changed just private details such as domain, DN, password etc. in external_acl_type). auth_param negotiate program /usr/local/libexec/squid/negotiate_kerberos_auth \ -r -s GSS_C_NO_NAME auth_param negotiate children 10 startup=2 idle=1 auth_param negotiate keep_alive on 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 # ldap query for group membership external_acl_type adgroups ttl=60 children-startup=2 children-max=10 %LOGIN \ /usr/local/libexec/squid/ext_ldap_group_acl -R \ -b "DC=example,DC=org" \ -D "CN=AD Query,OU=Users,OU=BG,OU=RS,DC=example,DC=org" \ -w "mylongpassword" \ -f "(&(objectclass=person)(sAMAccountName=%v)\ (memberof=CN=%a,OU=Web Services,OU=Groups,OU=BG,OU=RS,DC=example,DC=org))" \ -h dc.example.org # map ldap groups to squid acls acl basic_users external adgroups squid_basic acl advanced_users external adgroups squid_advanced acl expert_users external adgroups squid_expert # filter by dstdomain acl basic_domains dstdomain "/usr/local/etc/squid/basic_domains" acl advanced_domains dstdomain "/usr/local/etc/squid/advanced_domains" # filter by extension acl basic_extensions urlpath_regex -i "/usr/local/etc/squid/basic_extensions" acl advanced_extensions urlpath_regex -i "/usr/local/etc/squid/advanced_extensions" # require proxy authentication acl auth proxy_auth REQUIRED # custom error pages deny_info ERR_BASIC_DOMAIN basic_domains deny_info ERR_ADVANCED_DOMAIN advanced_domains deny_info ERR_BASIC_EXTENSION basic_extensions deny_info ERR_ADVANCED_EXTENSION advanced_extensions http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow localhost manager http_access deny manager http_access deny to_localhost # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS http_access deny !auth all http_access allow !basic_domains !basic_extensions basic_users http_access allow !advanced_domains !advanced_extensions advanced_users http_access allow expert_users all # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS http_access allow localhost http_access deny all ssl_bump splice localhost ssl_bump bump all error_directory /usr/local/etc/squid/myerrors http_port 127.0.0.1:3128 http_port 10.20.0.13:8080 ssl-bump generate-host-certificates=on \ dynamic_cert_mem_cache_size=4MB \ cert=/usr/local/etc/squid/myCA.pem sslcrtd_program /usr/local/libexec/squid/ssl_crtd -s /usr/local/etc/squid/ssl_db -M 4MB sslcrtd_children 10 startup=2 idle=1 cache_dir ufs /var/squid/cache 13000 16 256 coredump_dir /var/squid/cache 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 icap_enable on icap_send_client_ip on icap_send_client_username on icap_client_username_encode off icap_client_username_header X-Authenticated-User icap_preview_enable on icap_preview_size 1024 icap_service service_req reqmod_precache bypass=0 icap://127.0.0.1:1344/squidclamav adaptation_access service_req allow all icap_service service_resp respmod_precache bypass=0 icap://127.0.0.1:1344/squidclamav adaptation_access service_resp allow all -- Before enlightenment - chop wood, draw water. After enlightenment - chop wood, draw water. Marko Cupać https://www.mimar.rs/ _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users
