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://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 Www3 Www4 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 www3 or www4 during upgrades etc. (Ditto for
mx, mx1, mx2, mx3 mx4 & ftp, ftp1, ftp2, ftp3 ftp4 ).