[CentOS-mirror] DOS attack downloading DVD isos
Nick at 141networks.com
Thu Nov 26 03:06:50 UTC 2009
To be 100% honest, I was going off the fedora mirroring tutorial, And
Was mistaken, It states this.
Redirecting ISO downloads to FTP
Apache 2.x and earlier can't distribute files larger than 2GB. This
means DVD images won't work. (lighttpd doesn't have this limitation).
Also, some people find FTP to be more efficient than HTTP for really
large files like ISO images. These Rewrite lines will redirect all HTTP
GET requests for *.iso files to a different FTP daemon. With this
method, HEAD requests used by the MirrorManager crawler for *.iso files
aren't rewritten, which gives better crawling results.
On 11/25/2009 10:00 PM, H. Peter Anvin wrote:
> On 11/25/2009 03:19 PM, Nick Olsen wrote:
>> A lot of mirrors do this anyways. ISO's are big files, HTTP wasn't made
>> to move big files. Most people do this just so the user has a better
>> chance of the download completing successfully.
> What makes you say that http was not made to move big files? There is
> absolutely nothing about http which makes it unsuitable for large files.
> I would personally consider a mirror redirecting http traffic to ftp to
> be broken. It's at the very best rude for people behind firewalls.
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