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SRW2008 web interface will fail to log on user when web URL contains invalid characters

If the hostname of a SRW2008 switch contains non valid characters for FQDN (fully qualified domain names)  the web interface will not log the user on but repeat the log on screen in a loop.

Example:

The hostname of the switch is:  deau_ls001

(note the underscore in the name)

The companies domain name is:  acme.com

The DNS server of the zone acme.com will resolve an IP address for "deau_ls001.acme.com" as 192.168.1.254.

Then:

If you use following URL in the  webbrowser:  http://deau_ls001.acme.com.

The web site will appear, but any subsequent log on attempt will fail.

If you use the IP address in the URL instead:  http://192.168.1.254

The log on procedure completes successfully.

Recommendation: Use only valid characters in hostnames

Tested with firmeware: 1.0.2 and 1.0.4

Note about valid charatcters in domain names from wikipedia:

Restrictions on valid host names
Hostnames are composed of series of labels concatenated with dots, as are all domain names[1]. For example, "en.wikipedia.org" is a hostname. Each label must be between 1 and 63 characters long, and the entire hostname has a maximum of 255 characters.
RFCs mandate that a hostname's labels may contain only the ASCII letters 'a' through 'z' (case-insensitive), the digits '0' through '9', and the hyphen. Hostname labels cannot begin or end with a hyphen. No other symbols, punctuation characters, or blank spaces are permitted.

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