[squid-users] URL access based on AD group membership

Nilesh Gavali nilesh.gavali at tcs.com
Mon Jun 20 09:21:47 UTC 2016


Thanks Eliezer for reply.
Its is working now for be perfectly with below command with -d option 
gives helpful debug info to troubleshoot.

external_acl_type AD_Group %LOGIN /usr/lib64/squid/squid_ldap_group -P -R 
-b "DC=ABCD,DC=GOV,DC=IN" -D svcproxy -w 123456789 -f 
"(&(objectclass=person)(userPrincipalName=%v)(memberof=cn=%a,ou=InternetAccess,ou=Groups,dc=ABCD,dc=GOV,dc=IN))" 
-h abcd.gov.in -s sub -v 3 -d

Currently I have configure squid with AD kerberos auth. also url access 
restricted based on  AD group membership.

Now I observed, is that when I add any user to one of the AD group which 
allowed in squid.  it is not accepting the changes until I restart the 
squid service.
Is this the way squid behave or do I need to follow different procedure. 
So as user added to AD group it will recognised by squid on the fly 
without restarting squid service.


Thanks & Regards
Nilesh Suresh Gavali
Tata Consultancy Services
3rd Floor, Tithebarn House
Tithebarn Street
Liverpool - L2 2NZ
United Kingdom
Mailto: nilesh.gavali at tcs.com
Website: http://www.tcs.com
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                        Consulting
____________________________________________

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and registered with Registrar of Companies, Mumbai, India - No: 11-84781
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 Registered  in UK : 18 Grosvenor Place, London SW1X 7HS - BR :007627




From:   Eliezer Croitoru <eliezer at ngtech.co.il>
To:     'Nilesh Gavali' <nilesh.gavali at tcs.com>
Cc:     squid-users at lists.squid-cache.org
Date:   20/06/2016 10:06
Subject:        RE: [squid-users] URL access based on AD group membership



Hey Nilesh,
 
Did you tried to test it in any way outside of squid?
Like in a command line as a self running program?
 
Eliezer
 
----
Eliezer Croitoru
Linux System Administrator
Mobile: +972-5-28704261
Email: eliezer at ngtech.co.il

 
From: squid-users [mailto:squid-users-bounces at lists.squid-cache.org] On 
Behalf Of Nilesh Gavali
Sent: Friday, June 17, 2016 5:25 PM
To: squid-users at lists.squid-cache.org
Subject: [squid-users] URL access based on AD group membership
 
Team; 
Need expert help here, 
here is my set up - as of now squid integrated with Windows 2012R2 AD, SSO 
with kerberos - working fine. 
Now I want to restrict Internet access for user based on their AD group 
membership. I tried loads of options from various site but no luck. not 
sure what is going wrong. 
here is my squid config, and cache.log o/p. 

============================= 
# 
# Recommended minimum configuration: 
# 

auth_param negotiate program /usr/lib64/squid/squid_kerb_auth -s 
HTTP/proxy02.abcd.gov.in at ABCD.GOV.IN 
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 %LOGIN /usr/lib64/squid/squid_ldap_group -P -R 
-b "DC=ABCD,DC=GOV,DC=IN" -D svcproxy -w 123456789 -f 
"(&(objectclass=person)(userPrincipalName=%u)(memberof=cn=%g,ou=InternetAccess,ou=Groups,dc=ABCD,dc=GOV,dc=IN))" 
-h abcd.gov.in -s sub -v 3 -d 

acl infrateam external AD_Group lgInternetAccess 
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 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 uncommented 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 deny infrateam windowsupdate 
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 xx.xx.2.108 parent 8080 0 default 
#dns_nameservers DNSSVR.abcd.gov.in 
dns_nameservers XX.XX.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 

# 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 o/p- 
Connected OK 
group filter '(&(objectclass=person)(
userPrincipalName=da.853438 at ABCD.GOV.IN)(memberof=cn=lgInternetAccess,ou=InternetAccess,ou=Groups,dc=abcd,dc=gov,dc=in))
', searchbase 'DC=ABCD,DC=GOV,DC=IN' 
====================================== 


Thanks & Regards
Nilesh Suresh Gavali
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