telnet us.archive.ubuntu.com 80
Connected to us.archive.ubuntu.com.
Escape character is '^]'.
HEAD /ubuntu/pool/main/libc/libcrypt-openssl-rsa-perl/libcrypt-openssl-rsa-perl_0.28-1build1_amd64.deb HTTP/1.0
HTTP/1.1 404 Not Found
Date: Wed, 08 Jul 2015 23:39:14 GMT
Server: Apache/2.4.7 (Ubuntu)
Connection: close
Content-Type: text/html; charset=iso-8859-1
Connection closed by foreign host.
$ telnet us.archive.ubuntu.com 80
Trying 91.189.91.13...
Connected to us.archive.ubuntu.com.
Escape character is '^]'.
HEAD /ubuntu/pool/main/libc/libcrypt-openssl-rsa-perl/libcrypt-openssl-rsa-perl_0.28-1build1_amd64.deb HTTP/1.1
Host: us.archive.ubuntu.com
HTTP/1.1 200 OK
Date: Wed, 08 Jul 2015 23:39:42 GMT
Server: Apache/2.2.22 (Ubuntu)
Last-Modified: Tue, 22 Oct 2013 09:14:20 GMT
ETag: "62a2-4e950d3635300"
Accept-Ranges: bytes
Content-Length: 25250
Content-Type: application/x-debian-package
Connection closed by foreign host.