Questions tagged [squid]

Squid is a FOSS package licensed under the GNU GPL and is primarily used as a web proxy server and cache.

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Windows Defender - Windows Server 2019 client onboarding - via squid proxy server

I have prepared Azure environment, VMs:winsrv2019, winsrv2012. Both VMs are deployed in the isolated azure subnet (only traffic to security tools and to proxy server is allowed). In second subnet I ...
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35 views

Forwarding all traffic to transparent proxy

I want to redirect all of the traffic from my instance to another instance that’s running a transparent squid proxy, using IP tables rules and NOT changing the instance’s default route. is it done on ...
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Squid Proxy giving NONE/503 error

I set my addon IPs in netplan, and after that, I install SquidProxy on this server and use the default config, but I add with this tcp_outgoing_address my 10 IPs to Squid config. but I get 503 error ...
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Squid taking 2 minutes to fail over between parents

Squid Version 3.5.27 running on Ubuntu 18 VM. Certain applications are only accessible via our on-prem data centers, so as a work-around we configure a parent cache for internal domain names. ...
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What are the system requirements for a squid forward proxy?

I would like to set up a squid forward proxy to proxy data outbound data from hosts that have no internet access. The flow would be from application hosts located in a secure zone with no internet ...
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60 views

Configuring Squid to not log TCP connections (lots of “error:transaction-end-before-headers” showing up in logs)

We run Squid proxies in GCP, and are in the process of migrating from CentOS 7 to 8. I'm working on using the GCP Internal L4 load balancer to improve redundancy/failover, and have configured a ...
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53 views

Optimal ssl_bump configuration for whitelisted squid proxy

I've been banging my head against the wall for a few days now trying to get a whitelisted squid proxy to work. This is the first time working with squid 4.11 and don't remember having so many issues ...
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52 views

Persistent connection not working between the squid (version 4.13) and Apache (origin server)

I would be very happy if somebody could help. I am basically trying to make the connection between the Squid (version 4.13) proxy and the Apache server (origin) persistent. I've tried the ...
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26 views

How to route all traffic through another server using a single port before connecting to multiple transparent proxies?

I have the following environment : Server A : My server where all requests will originate from Server B : My server where I which to route all traffic from Multiple Proxies: C1, C2, C3, C4, etc : ...
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what to check when can't connect the port of Squid proxy server on remote server

I want to connect from local pc(Windows10) to the specific port on the remote server(Windows server2019). The port is of Squid proxy server. But, I tried checking with PowerShell command on the local ...
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How can I route usb modem packets with squid

I have two usb modems connected to a linux machine, both connections are made through wvdial and are working, I verified they work with: curl https://api.myip.com/ --interface pppx and ping www.google....
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How to connect an “SSLv3 only” web client to a web server that only accept TLS1.0 - TLS1.2

I have a legacy embedded HTTP client (very old) that supports SSLv3, TLS1.0, TLS1.1 and TLS1.2. I would like to remove SSLv3 for security reasons. I rebuilt the openssl library and wanted to verify if ...
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how to setup proxy server on internet in good security to be requested from IP addresses that I already know

My goal is that my colleages in our company can make https request via proxy server(Squid) outside of the company network to final destination API server. My colleages can make requests from company ...
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1answer
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Squid 3.5.20 No Internet Access

I installed Squid Proxy 3.5.20 on CentOS 7 The server is connected to the internet and pings Squid is running with no errors When I try to pass through Squid in Chrome I get no internet access for ...
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99 views

Squid HTTP Transparent Proxy for Spoofed DNS Requests

I'm working on a security project which requires a remotely-accessible transparent proxy. I have set up an Azure VM running Ubuntu 18.04 with squid running as a transparent proxy. I'm only concerned ...
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56 views

squid + icap not working if using tls interception, but both work separately

So I have a relatively simple squid configuration that offers a proxy over HTTPS, performs TLS interception via ssl-bump and passes on requests to an ICAP server. visible_hostname proxy forwarded_for ...
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75 views

Integration of Squid Proxy to Anonymous Open Proxies to cache html response from Anonymous proxies

I need to Cache html response from anonymous proxies using squid caching server. However my requirement is something as given: From client machine I need to connect to anonymous proxy with ...
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Squid in dual stack ipv4 / ipv6 reaching out for services only served on ipv4 interface

I am running a dual stack network and am running a server there (Squid, Apache, DHCP, Mail,...). The network is working properly. However not all services running on that server provide a listener on ...
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30 views

Which response headers are making Squid's refresh_pattern ineffective?

I cannot get Squid to cache anything with the following origin response headers. When I use curl repeatedly, I get the following response > curl -s -D - -o /dev/null -x "http://localhost:3128&...
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34 views

Can you ssh into a server given only an HTTPs address

I have a server that I have a domain name for. The DNS redirects the address ssh.example.com to https://example.com:12345/ssh/. Note: My server DNS needs to have a port as my server isn't accessible ...
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How to make Squid cache files with AWS auth headers

I want to cache images that I get from AWS S3. My HTTP request contains "x-amz-content-sha256", "x-amz-date", and "authorization" headers. Squid can fetch the images fine,...
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Issue with Difference In Proxies

I have been recently diving deep into making proxies using servers and such. There are multiple proxy companies where their proxy IPs are traced back to https://www.hetzner.com/. These proxies provide ...
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How to force streamed image objects to be cached by Squid Forward Proxy

I am accessing images stored on storage like AWS S3 or GCS. I am using a node library called Got to fetch an image, and I stream the response into an image processor. I am using Got with a tunnel ...
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25 views

How can I allow a single address to access multiple URL in Squid?

We have squid setup and it is blocking everything and allowing some specific sites for all users. Now we have 1 user who wants to access skype and hotmail. If we add skype and hotmail to allow_sites....
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what is the correct syntax to declare ports in squid?

what is the correct syntax to declare ports in squid? In Squid official says (edited): acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port ...
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1k views

what are the whatsapp port numbers?

Update question about whatsapp ports: According to official facebook: 5222 443 According to screwloose: TCP: 4244,5222,5223,5228,5242 TCP/UDP: 50318,59234 UDP: 3478,45395 According to quora: TCP ...
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Transparent Proxy with Squid 4.10 not working

Squid 4.10 on Ubuntu Server 20.04 I have tried so many things and spent this entire week researching on how to get this working. To get an idea of what I am trying to do here, take a look at these ...
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163 views

How to block mime_types by https with Squid?

I have this rule to block extensions: acl bl_ext url_regex -i "/path_to/bl_ext.txt" http_access deny workdays bl_ext Example content file "bl_ext.txt": \.avi([a-zA-Z][0-9]*)?(\?.*)...
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Use of :80 in proxy URL

Setting some Squid proxies up, and trying to figure out some behavior. Squid in a pass-all configuration, with the linux node set to forward 80 to port 3128, which Squid is listening on. I do have an ...
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50 views

Change path of cookie using Squid

I am using squid reverse proxy on Windows. I already tried using it for http and https and it is working fine. However, this time, I want to try changing the path of cookie so that same JSESSIONID ...
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How to redirect multiple subdomains through gateway server to internal app server with single IP address on different ports for each subdomain?

I am having a problem with trying to redirect subdomain url to a Application server that have apps on different ports but a single IP address. Basically, here are the steps: Client outside the network ...
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Squid doesn't save AD changes

My Squid-Proxy does not safe group changes in my active directory. So if a user becomes member of another group(meaning the Administrator changes his group settings) winbind will recognize it, but ...
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winbind works but Squid acts wrong

I am trying to get a Squid Proxy running with Kerberos+Samba+Winbind, which is connected to my AD. Everything works great so far! krb auth working wbinfo -u, -a, -g working I made some new testing-...
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198 views

Squid Proxy with SSL and Gmail

I am trying to get squid to work with SSL so i can open up gmail but only with access to our domain, here is my config coredump_dir /var/spool/squid workers 4 http_port 3128 ssl-bump \ ...
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34 views

Squid Block/deny/disable cookies?

I wanted to try blocking cookies for matched URLs. I read this Squid - Users - "unset" or "remove" cookies on static content from the backend server and found I could do that, ...
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25 views

How to setup squid to proxy the requests to a specific url?

I have this in nginx and squid should do the same: server { listen 8081; server_name localhost; location / { proxy_pass http://localhost:8999/...
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23 views

Squid outgoing address configuration with 2 interfaces

I'm trying to forward the traffic from one network (net1) to another network (network2) via a squid proxy which has 2 interfaces (eth1 and eth0) using the tcp_outgoing_address option. My network is as ...
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197 views

Prevent Squid Proxy to change the outgoing request's IP address as it's own

We are trying to forward the traffic of our virtual machine to Squid Proxy. When the requests are bumped by Squid Proxy and leaves the proxy, all the request's source Ips are changed from the client's ...
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119 views

OpenVPN via proxy not sure what's happening, Clarification about theory?

I'm currently running OpenVPN and a squid proxy on a small VPS. In the config file of the VPN I'm using OpenVPN proxy options to connect to the proxy before the VPN. The interesting part of the ...
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26 views

Squid - Source DNS queries from different interfaces, by ACL

I am using CentOS7, squid-3.5, and a Synology RT2600ac (router). What I'm trying to do: The Synology has features called Safe Access and another called Traffic Control. The features allow my to ...
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Traffic to web caching proxy from non proxy-configured client?

Before even attempting to setup something that wouldn't work, I'd like to understand if the following configuration has a logic. Basically we want to stop Chromebooks to steal bandwidth on updates. ...
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237 views

Squid Proxy Multiple Ports based different outgoing address configuration not working

I have squid Configuration in ubuntu 20 with multiple listening ports and each port has different outgoing address assigned by using "tcp_outgoing_address" directive. but In Ubuntu my ...
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23 views

Squid would not use user authentication

I have set up Squid on CentOS 8 VPS and configured it as follows auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/passwd auth_param basic casesensitive on auth_param basic realm ...
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171 views

Squid proxy ignores squidguard rewrite url, domains and forwards to blocked url (squid 3.5)

I've squid 3 setup on ubuntu server (DISTRIB_RELEASE=18.04) squid proxy version: 3.5.27 with the below config. When i try to access any url for example a porn site, which is blocked in squidGuard ...
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Ubuntu Linux Squid Proxy + Windscribe VPN

I am running into an interesting VPN/Proxy scenario and looking for help! My goal: run a proxy server that my clients can connect to and have the outbound traffic from the proxy server route through a ...
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46 views

Configure Nginx to route call to upstream server using corporate http proxy

I have a third party application which need to access an HTTPS URI on a remote location. Here are my constraints: Access to remote URI need to go through a corporate HTTP PROXY Calls need to have ...
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50 views

iptables tproxy with statistic --mode nth

I`m using squid now. and i run 4 squid for load-balance and i trying to change my iptables rule. this is my current rules. iptables -t nat -A PREROUTING -p tcp --dport 443 -m state --state NEW -m ...
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When I enable basic http auth in squid proxy .conf file it fails to start the squid service

I have setup squid proxy in my AWS linux instance and it is working as expected. here is the working squid.conf file. acl artifactory dstdomain xyz.abc.defg.com acl codebuild_us_east_1 src 34.228.4....
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320 views

Adding multiple outgoing IP addresses in Squid with different ports [duplicate]

I have a Squid proxy server running on CentOS 8, the server itself was supplied with an additional /27 subnet. The problem I'm having at the moment is that all outbound connections seem to be going ...
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171 views

Squid IP Routing Issue

I have a squid server installed with 30 additional proxy addresses. Whenever I try to use one of these proxy addresses with a browser, like chrome, my IP shows as the main server IP as opposed to the ...

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