Linux Proxy Controller/Forwarder

I need a Linux-based proxy controller/forwarded that will take requests from users, and use a proxy from our database to relay it. Preferably, you would use something out-of-the-box like Squid Proxy Server and modify it to achieve the below.




Sample DB structure: [login to view URL]




1. User specifies proxy conditions (ie. “city”) to one of their assigned ports (“PortID”)

2. User specifies {UserID}.[login to view URL]:{PortID} in their browser

3. If more than X concurrent threads for PortID for the particular UserID, deny the request. The proxy controller should be able to limit the number of concurrent threads per port for each user

4. "[login to view URL]" selects working proxy from DB based on PortID conditions in #1

> If requested URL contains “google” but google != 1 for the proxy, then a new proxy is assigned

5. If request fails, new proxy matching conditions in #2 is assigned

6. Repeat #4 until the request is successful

7. "[login to view URL]" passes the response back to user's browser

Note that the proxy server should be able to:

- Intercept requests (ie. “[login to view URL]”) and change proxy based on it

- Query the DB for a proxy to use based on the user’s port conditions

- Forward user requests to the selected HTTPs/Socks4/Socks5 proxy from the DB

- Limit the number of concurrent threads to forward proxies and user's port




1. User sets proxy criteria in the DB ("PortID")

> ie. PortID "1" for UserID "a698j64p" is set to country=US, city=New York, isp=Comcast, rotate_seconds=300

>> In the above, user created PortID where they only want proxies from Comcast ISP in New York, and the proxy should rotate every 5 minutes

2. User will configure HTTP(s) or Socks4/5 proxy in their browser that points to: {UserID}.[login to view URL]:{PortID}

> ie. [login to view URL]

3. If PortID for UserID has over X simultaneous threads/connections, deny it with an error (we want to limit the number of concurrent threads per port). Otherwise, continue to next step

4. "[login to view URL]" fetches PortID criteria from #1 and selects matching proxies in the DB

> ie. SELECT [login to view URL],proxy_ip,proxy_port

FROM lists

LEFT JOIN logs ON [login to view URL] = [login to view URL]

LEFT JOIN ports ON [login to view URL] = [login to view URL]

WHERE [login to view URL] LIKE "comcast" AND lists.total_fail_users < 3 AND lists.total_fail_reqs < 3 AND lists.current_threads < lists.max_threads AND ([login to view URL] IS NULL OR logs.last_used < (NOW() - INTERVAL 60 MINUTE) AND ports.userID="a698j64p" AND ports.port=1

SELECT [login to view URL],[login to view URL],[login to view URL] FROM lists

LEFT JOIN logs ON [login to view URL] = [login to view URL]

LEFT JOIN ports ON lists.port=[login to view URL]

WHERE [login to view URL] < 5 OR [login to view URL] IS NULL


- total_fail_users: # of users that encountered failure on the proxy

- total_fail_reqs: #of requests (across all users) that encountered failure on the proxy

- current_threads: To not overwhelm proxies, we might have to limit the number of concurrent threads connecting to it. This column will contain the current number of current threads (although I am not sure MySQL is the most optimal to use for this because of the massive amount of reads/writes required)

- last_used: When the proxy was last used by the user

5. "[login to view URL]" forwards GET/POST request (with all headers)

a) If proxy fails:

- "[login to view URL]" updates total_fail_reqs++ and total_fail_users++

- Add "last_used" for proxy with current timestamp

- Select different proxy and perform request again (user's connection should not drop)

> if no remaining proxies, output error message and continue retrying every X seconds

b) If proxy is a success, return response to user

- Reset total_fail_reqs and total_fail_users

- Add "last_used" for proxy with current timestamp

NOTE: Please include your intended stack and any similar projects in the bid.

Evner: Linux, MySQL, Nginx, Shell Script, Squid Cache

Se mere: squid forward proxy example, how to use squid proxy, linux transparent proxy, open source proxy server, linux http proxy server, squid cache_peer https, caching proxy, squid proxy forward to another proxy, linux proxy site, linux proxy rtsp, red hat linux proxy settings, linux proxy filtering gateway, setting linux proxy server use multiple outbound ips, linux proxy scanner script, wol linux proxy, curl linux proxy, linux proxy scanner, linux proxy farm setup, linux proxy scanner scripts, linux proxy script user

Om arbejdsgiveren:
( 7 bedømmelser ) Toronto, Canada

Projekt ID: #18661026

7 freelancere byder i gennemsnit $519 på dette job


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