On 29/05/17 23:47, Vieri wrote:
Hi,
I'm unable to block specific file downloads in http/https traffic. For example,
I'd like to block .cab files from being downloaded.
Here's what I have:
# grep cab /usr/local/proxy-settings/denied.filetypes
\.cab(\?.*)?$
# grep -v ^# squid.test.conf | grep -v ^$
http_access allow localhost manager
http_access deny manager
http_port 3228 tproxy
https_port 3229 tproxy ssl-bump generate-host-certificates=on
dynamic_cert_mem_cache_size=16MB cert=/etc/ssl/squid/proxyserver.pem
acl localnet src 10.0.0.0/8 # 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 interceptedhttp myportname 3228
acl interceptedhttps myportname 3229
acl denied_filetypes urlpath_regex -i
"/usr/local/proxy-settings/denied.filetypes"
acl denied_mimetypes_req req_mime_type -i application/x-cab
acl denied_mimetypes_rep rep_mime_type -i application/x-cab
http_access deny denied_mimetypes_req
http_access deny denied_mimetypes_rep
http_access deny denied_filetypes
In cache.log I see:
Content-Type: application/x-cab
Content-Disposition: attachment;filename="fake.cab";filename*=UTF-8''fake.cab
BTW if I replace the following:
acl denied_mimetypes_req req_mime_type -i application/x-cab
acl denied_mimetypes_rep rep_mime_type -i application/x-cab
with
acl denied_mimetypes_req req_mime_type -i application/x-
acl denied_mimetypes_rep rep_mime_type -i application/x-
then the cab file downloads are correctly blocked. This is obviously too
restrictive.
This must be a dumb mistake on my behalf.
What am I missing?
Several things:
1) http_access is tested only for requests.
response/reply messages are controlled though http_reply_access.
<http://www.squid-cache.org/Doc/config/http_reply_access>
2) rep_mime_type ACL (note the 'p') tests reply headers, thus for use in
http_reply_access and will not work in http_access.
3) req_mime_type ACL (note the 'q') tests request headers. It is for
upload file types (POST, PUT etc).
Amos
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