Hi.
OK, so you are not using a VPN network. But it could also be on the WiFi router... either using a VPN network on the router or a poorly configured router regarding the internet gateway and the like. But I'm just guessing now, I'm not saying that it is.
Have you tried downloading links from your PuTTY terminal via a web browser on your PC ? Did it work ?
As for the WGET command, the Linux system is case sensitive. So you have to use lowercase letters. For example, use this form:
wget -d -O /tmp/test_file.gz URL_LINK
-d for debug
-O to redirect output file
URL_LINK to replace with the URL address to download the file
