On 6/01/21 6:21 am, Wolfgang Paul Rauchholz wrote:
I run a home server under Centos 7 and squid 3.5.20. The config is still
work in progress as I started only today. Any tipps&tricks are welcomed
The function is as expected when working from my LAN. But when I tested
today from my cell phone from outside I received a few TCP_DENIED for
web pages that are not part of the blacklists and I can access from my LAN.
I also tried a few apps (e.g. Twitter, Linkedin, etc..) and none worked.
Underneath the config as-is.
Any idea why I cannot connect?
The provided squid.conf has two types of access permitted through this
proxy:
1) non-LAN traffic is allowed to anything on the whitelist.
2) LAN traffic is allowed to anything on the whitelist AND anything not
on the blacklist(s).
So the key question is whether the domains you tried are (or were) on
the whitelist when you access them from outside the LAN.
I have two more question I fiddled with and has no success:
* Is there a possibility to re-direct certain MACs from the LAN
through Squid and others can go direct?
Getting traffic to the proxy is entirely the OS duty. Most OS can route
or NAT IPv4 packets based on MAC.
Note that if the client is not opening connections to the proxy by
itself then you need to follow one of the interception configurations on
the Squid machine. see
<https://wiki.squid-cache.org/ConfigExamples/Intercept/LinuxRedirect>
Squid needs separate http_port's for the intercepted traffic and the
normal proxy traffic.
* Is there a good howto that describes in detail how autdetect proxy
works with wpad.dat. I want that when users are on LAN they go
through squid, but when they are travelling they can go direct.
I suggest you have a read of the FAQs
(<https://wiki.squid-cache.org/SquidFaq/ConfiguringBrowsers>) about how
proxies can be used by Browsers. In particular the section "Recommended
network configuration" and links from there.
Thanks for your help,
Wolfgang
#acl localnet src 172.16.0.0/12 <http://172.16.0.0/12> # RFC1918
possible internal network
#acl localnet src 192.168.0.0/16 <http://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
# Add wo-lar LAN IP
acl lan src 10.5.2.0/24 <http://10.5.2.0/24>
FYI: this is what "localnet" ACL is supposed to be set to.
As the squid.conf file itself says:
# Adapt localnet in the ACL section to list your (internal) IP networks
# Basic user auth
#auth_param basic program /usr/lib64/squid/basic_ncsa_auth
/etc/squid/.htpasswd
#auth_param basic children 5
#auth_param basic realm Squid Basic Authentication
#auth_param basic credentialsttl 5 hours
#acl password proxy_auth REQUIRED
#http_access allow password
FYI: if you ever want to enable auth this should all be down below the
blacklist http_access lines.
#
# Recommended minimum Access Permission configuration:
#
# 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
Please re-enable the above lines. They are protecting against whole
groups of security attacks.
# Only allow cachemgr access from localhost
http_access allow localhost manager
http_access deny manager
# 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
#
acl allowdomains dstdomain "/etc/squid/whitelists/domains"
acl porn dstdomain "/etc/squid/blacklists/porn/domains"
acl drugs dstdomain "/etc/squid/blacklists/drugs/domains"
http_access allow allowdomains
http_access deny porn
http_access deny drugs
# 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 localhost
http_access allow lan
# And finally deny all other access to this proxy
http_access deny all
request_header_access Referer deny all
request_header_access X-Forwarded-For deny all
You have configured "forwarded_for off" and are not using the clients
X-Forwarded-For header. Which means the above setting does nothing useful.
request_header_access Via deny all
request_header_access Cache-Control deny all
The above breaks HTTP in bad ways. Your clients will not be having a
good experience without Cache-Control.
Amos
_______________________________________________
squid-users mailing list
squid-users@xxxxxxxxxxxxxxxxxxxxx
http://lists.squid-cache.org/listinfo/squid-users
