We are trying to connect to proxy to provide internet access to the server . We get unauthorized acc

We are trying to connect to proxy to provide internet access to the server . We get unauthorized access error while trying a curl on google.com

The same credentials work on other flavours like redhat.

We used the below :-

export http_proxy=http://Username:Password@proxyip:port

export https_proxy=http://Username:Password@proxyip:port

export ftp_proxy=http://Username:Password@proxyip:port

we also tried

export http_proxy=http://domain\\Username:Password@proxyip:port

but didnt help. Kindly suggest.