aria2c -x 16 -s 16 --referer="https://allowed-domain.com" "http://dl3.restricted-server.com/file.zip" Note: Only use this if not violating your data center's AUP (Acceptable Use Policy). Many system administrators make the mistake of using a consumer VPN (NordVPN, ExpressVPN) to bypass dl3/dl4 blocks. This is not the better way. Consumer VPNs are often throttled or blocked by data centers because their IP ranges are publicly listed.
export http_proxy="http://your-vps-ip:3128" wget http://dl3.example.com/file.iso A private proxy uses a clean, unblacklisted IP. Data centers cannot distinguish it from normal HTTPS traffic. Plus, you control the logging and encryption. Better Solution #4: Request a Specific Exception from Your Data Center This is the most overlooked better method. Instead of fighting the restriction, contact your data center's NOC (Network Operations Center) with a business justification . aria2c -x 16 -s 16 --referer="https://allowed-domain
Note: The keyword phrase is slightly ungrammatical ("better" at the end seems out of place). I have interpreted the user’s intent as addressing the restriction message and providing a "better" solution. The article will treat the phrase as a technical notification and explain how to handle it effectively. If you have ever tried to download large datasets, Linux ISOs, or AI model weights from shared hosting platforms, you have likely encountered a frustrating wall of text that reads: "Downloading from dl3 and dl4 servers is restricted by our data center." For the average user, this message is cryptic. For system administrators and data engineers, it is a familiar headache. But what does this error actually mean? Why are these specific servers (dl3 and dl4) singled out? And most importantly, what is the better way to get your data without running into this roadblock? Consumer VPNs are often throttled or blocked by