Phys - For Old Browsers
The right column of URLs marked "Phys" is for users of old
browsers that do not support virtual name domains, & only
support physical domain names.
docs/ vhosts/ name-based.html
Some ancient clients are not compatible with name-based
virtual hosting. For name-based virtual hosting to work,
the client must send the HTTP Host header. This is required
by HTTP/1.1, and is implemented by all modern HTTP/1.0
browsers as an extension.
Browsers I've checked all emit HTTP/1.0 requests & fetch
- Lynx: Apache reporting it as: "Lynx/2.8.4rel.1
- Mozilla: Apache reporting it as: "Mozilla/5.0 (X11; U;
FreeBSD i386; en-US; rv:0.9.7) Gecko/20020527"
- Netscape: Apache reporting it as: "Mozilla/3.04 (X11;
I; FreeBSD 4.5-RELEASE i386)"
- Opera: Apache reporting it as: "Mozilla/4.0
(compatible; MSIE 5.0; Linux 2.4.2 i386) Opera 6.0
Www or Not
The official names begin with a www. eg: http://www.berklix.com
Variations on names, eg without www. are possible: EG http://www.berklix.com
usually work, but are Not guaranteed to always work.
This is not a fault but desired behaviour, & involves
an understanding of DNS technology & the current status
of cluster & individual node statuses of domains. If you
really need to know more ask the domain administrator.
Www, Www1, Www2 etc
Variations on names are possible: www is the default web
server, which is usually the same as www1, www may be
switched to www2 during upgrades etc. (Ditto for mx, mx1, mx2
& ftp, ftp1, ftp2 ).