[Samba] ntlm authentication issues

[Marcio Demetrio Bacci]

Hi,

I set up Squid 4.6 on Debian 10 and I'm having problems with browser
authentication on a Windows station.

I did the tests on the command line and apparently it's OK.

root at proxy:/etc/squid/acls# /usr/bin/ntlm_auth
--helper-protocol=squid-2.5-basic
Registered MSG_REQ_POOL_USAGE
Registered MSG_REQ_DMALLOC_MARK and LOG_CHANGED
lp_load_ex: refreshing parameters
Initialising global parameters
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
Processing section "[global]"
EMPRESA+mane XXXXX
NT_STATUS_OK: The operation completed successfully. (0x0)
OK

Here are my configuration files:

#/ETC/SAMBA/SMB.CONF
[global]
    netbios name = PROXY
    workgroup = EMPRESA
    security = ADS
    realm = EMPRESA.COM.BR
    encrypt passwords = yes
    username map = /etc/samba/user.map

    log file = /var/log/samba/%m.log
    log level = 3 passdb:5 auth:5

    idmap config * : backend = tdb
    idmap config * : range = 3000-7999

    idmap config EMPRESA:backend = ad
    idmap config EMPRESA:schema_mode = rfc2307
    idmap config EMPRESA:range = 10000-999999
    idmap config EMPRESA:unix_nss_info = yes
    idmap config EMPRESA:unix_primary_group = yes

    winbind refresh tickets = Yes
    winbind use default domain = yes
    winbind separator = +
    winbind enum users = yes
    winbind enum groups = yes

    vfs objects = acl_xattr
    map acl inherit = yes
    store dos attributes = yes

    template shell = /bin/bash
    template homedir = /home/%U

    dedicated keytab file = /etc/krb5.keytab
    kerberos method = secrets and keytab

    load printers = no
    printing = bsd
    printcap name = /dev/null
    disable spoolss = yes


#ETC/NSSWITCH.CONF
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         compat winbind
group:          compat winbind
shadow:         compat
gshadow:        files

hosts:          files dns
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis


#/ETC/KRB5.CONF
[libdefaults]
    dns_lookup_realm = false
    dns_lookup_kdc = true
    default_realm = EMPRESA.COM.BR


#/ETC/SQUID/SQUID.CONF

http_port 3128

cache_mem 512 MB
cache_swap_low 80
cache_swap_high 90

maximum_object_size 512 MB
minimum_object_size 0 KB

maximum_object_size_in_memory 4096 KB

cache_replacement_policy heap LFUDA
memory_replacement_policy heap LFUDA

quick_abort_min -1 KB

detect_broken_pconn on

fqdncache_size 1024

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

access_log /var/log/squid/access.log
cache_log /var/log/squid/cache.log

cache_dir aufs /var/spool/squid 600 16 256

auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-basic
auth_param ntlm children 20 startup=0 idle=1
auth_param ntlm keep_alive on

visible_hostname "Monitoramento de Acesso à Internet"
### acls
#acl manager proto cache_object
acl localhost src 192.168.1.17/32
acl to_localhost dst 192.168.1.17/32
acl SSL_ports port 22 80 3456 443 563 587 993 2811 3001 3322 7071 8443 9191
10000 23000
acl Safe_ports port 21 # ftp
acl Safe_ports port 70 # gopher
acl Safe_ports port 80 # http
acl Safe_ports port 88 # kerberos
acl Safe_ports port 123 # ntp
acl Safe_ports port 210 # wais
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 3456 # Siafi
acl Safe_ports port 389 # ldap
acl Safe_ports port 443 # https
acl Safe_ports port 488 # gss-http
acl Safe_ports port 563 # snews
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl Safe_ports port 3001         # imprenssa nacional
acl Safe_ports port 8080 # http
acl Safe_ports port 8443 # http
acl Safe_ports port 1025-65535 # unregistered ports

acl purge method PURGE
acl CONNECT method CONNECT

# ---- Windows Update ----
acl microsoft url_regex "/etc/squid/acls/ms-update"
acl atualizacoes dstdomain microsoft.com
http_access allow microsoft
http_access allow atualizacoes

http_access allow localhost
http_access allow purge localhost
http_access deny purge
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports

acl autenticados proxy_auth REQUIRED
http_access deny !autenticados

acl sites_liberados url_regex -i "/etc/squid/acls/sites-permitidos"
http_access allow sites_liberados

acl extensoes_bloqueadas url_regex -i "/etc/squid/acls/extensoes-proibidas"
http_access deny extensoes_bloqueadas

### Bloqueia sites por URL
acl sites_bloqueados url_regex -i "/etc/squid/acls/sites-proibidos"
http_access deny sites_bloqueados

### Rede LAN #####
acl rede_usuarios src 192.168.0.0/24

http_access allow rede_usuarios
acl extensoes_bloqueadas url_regex -i "/etc/squid/acls/extensoes-proibidas"
acl sites_liberados url_regex -i "/etc/squid/acls/sites-permitidos"
http_access allow sites_liberados
http_access deny extensoes_bloqueadas
http_access allow autenticados
http_access deny all

error_directory /usr/share/squid/errors/pt-br

coredump_dir /var/spool/squid

Can anybody help me?

Regards,

Márcio Bacci