[squid-users] TCP_DENIED/403 errors when ads blocking is activated
Nicolas
e.conti at gmx.net
Sat Dec 3 12:52:56 UTC 2022
Hello,
I installed squid on one of my servers, in order to block ads.
When I do not activate ads blocking, it works fine.
However, when I do activate ads blocking, some website are not accessible.
I can browse www.google.com for example, but I can't access www.linuxhint.com and a LOT of other websites.
Here's what appears in access.log :
1670071413.742 0 192.168.228.145 TCP_DENIED/403 3985 CONNECT linuxhint.com:443 - HIER_NONE/- text/html
Here's my squid.conf file :
acl localnet src 0.0.0.1-0.255.255.255 # RFC 1122 "this" network (LAN)
acl localnet src 10.0.0.0/8 # RFC 1918 local private network (LAN)
acl localnet src 100.64.0.0/10 # RFC 6598 shared address space (CGN)
acl localnet src 169.254.0.0/16 # RFC 3927 link-local (directly plugged) machines
acl localnet src 172.16.0.0/12 # RFC 1918 local private network (LAN)
acl localnet src 192.168.0.0/16 # RFC 1918 local private network (LAN)
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
acl ads dstdom_regex "/etc/squid/ad_block.txt"
http_access deny ads
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost manager
http_access deny manager
include /etc/squid/conf.d/*
http_access allow localnet
http_access allow localhost
http_access deny all
http_port 8080
cache_dir ufs /cachesquid 600 16 256
coredump_dir /var/spool/squid
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
Here's how I got the ad_block.txt file :
curl -sS -L --compressed "http://pgl.yoyo.org/adservers/serverlist.php?hostformat=nohtml&showintro=0&mimetype=plaintext" > /etc/squid/ad_block.txt
which is on my server :
-rw-r--r-- 1 root root 60609 2 déc. 16:40 /etc/squid/ad_block.txt
I don't see anything special in that file, which contains for example :
1-1ads.com
101com.com
101order.com
123freeavatars.com
180hits.de
180searchassistant.com
There's only one occurence of linux in that file :
grep -i "linux" /etc/squid/ad_block.txt
banner.linux.se
Do you know why I got those 403 errors? I gave one example only (www.linuxhint.com) but a LOT of websites are not accessible anymore as soon as I add that line in the squid.conf file :
http_access deny ads
Thank you for your help.
Nicolas.
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