[CentOS-mirror] best way to get local copy of vault

[WL]

I'm trying to create a local copy of CentOS-5.6 repo. The corporate
network blocks a lot of outgoing ports including rsync. The ones I
know that work include http{,s}, ftp and ssh. Given this limitation,
what is the best way to get a local copy besides the following?

wget -c -m -np -D vault.centos.org -R '*=?' http://vault.centos.org/5.6/

The connection gets refused after a while. Is it because the server
blocks such "mirroring" activities? My download speed is around
60KB/s.

--WL