Como se configura o proxy squid3 para suportar autenticação http - rápida e suja

Question

Estou interessado na solução mais fácil, a autenticação não precisa nem mesmo testar pares de usuários / passagens ... só tem que fazer o desafio de autenticação http. Eu estou tentando testar http auth em um proxy para uma biblioteca que estou trabalhando.

Eu implementei um script que retorna "ok" para usar como meu programa, como em:

auth_param basic realm Squid proxy-caching web server auth_param basic
program /usr/local/bin/ok

o squid morre, é isso que aparece no meu log:

2012/03/13 13:09:24| WARNING: basicauthenticator #1 (FD 12) exited
2012/03/13 13:09:24| WARNING: basicauthenticator #2 (FD 14) exited
2012/03/13 13:09:24| WARNING: basicauthenticator #3 (FD 16) exited
2012/03/13 13:09:24| WARNING: basicauthenticator #4 (FD 18) exited
2012/03/13 13:09:24| Too few basicauthenticator processes are running
2012/03/13 13:09:24| storeDirWriteCleanLogs: Starting...
2012/03/13 13:09:24|   Finished.  Wrote 0 entries.
2012/03/13 13:09:24|   Took 0.00 seconds (  0.00 entries/sec).
FATAL: The basicauthenticator helpers are crashing too rapidly, need help!

Squid Cache (Version 3.1.19): Terminated abnormally.
CPU Usage: 0.014 seconds = 0.008 user + 0.006 sys
Maximum Resident Size: 5709824 KB
Page faults with physical i/o: 0

há uma referência na documentação que pode estar relacionada, mas não tenho certeza de como implementar:

#   If you use an authenticator, make sure you have 1 acl of type
#   proxy_auth.

atualmente tentando isso:

link

    

Answer 1

Ótimo artigo - link

acabou usando o seguinte: use a seu próprio risco ... como eu não sei o que faz.

#proxy auth
auth_param basic program /usr/local/libexec/ncsa_auth /usr/local/etc/passwd
auth_param basic children 5
auth_param basic realm Squid proxy-caching web server
auth_param basic credentialsttl 2 hours
auth_param basic casesensitive off
#auth_param basic program /usr/local/bin/err

acl ncsa_users proxy_auth REQUIRED
http_access allow ncsa_users

#
# Recommended minimum configuration:
#
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 allow localnet
http_access allow localhost

# And finally deny all other access to this proxy
http_access deny all


# Squid normally listens to port 3128
http_port 3128

# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /usr/local/var/cache 100 16 256

# Leave coredumps in the first cache dir
coredump_dir /usr/local/var/cache

# 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

    

Answer 2

Algo como isso deve funcionar:

acl example proxy_auth REQUIRED
http_access allow example

Por uma questão de consistência, esta é uma configuração que você pode usar com o LDAP:

auth_param basic program /usr/lib/squid/ldap_auth -ZZ -b "dc=example,dc=com" -f "(&(uid=%s)(!(gn=noaccess))(!(cn=noaccess)))" -h ldap.example.org -v 3
acl ldap proxy_auth REQUIRED
http_access allow ldap
http_access deny all

O que ele faz é tentar autenticar o usuário com uid contra o servidor LDAP ldap.example.org (preferencialmente usar um endereço IP), e ele não permitirá acesso quando gn for igual a "noaccess" ou cn for igual a "noaccess" .

Ele negará acesso a todo o resto.