Checking websites for malicious content!

These can be done online:

Try:
http://linkscanner.explabs.com/linkscanner/default.aspx
http://www.siteadvisor.com/#

And the name was with DNS

Find out dns server ip address under:

Windows  C:\>ipconfig /all

Linux:  $ cat /etc/resolv.conf

Wildcard DNS: refer this

Wildcard DNS and apache virtual host setup here

Rewrite rules in apache and IIS

Well we can control how the server serves stuff to clients by defining rewrite rules.

As servers are dumb, its important to explain well about the rewrite rules. For example you should explicity say when a rule matches a URL pattern, no need to seek for further rules('L' flag).

The most interesting part is the regular expressions used for rewrite rules. This I will discuss sometime later...But to do some hit and try use me.

Okie, first with apache:
The rewrite rules are handled by module mod_rewrite. This reads the rewrite conf file configured in httpd.conf.

Include the rewrite rule path in httpd.conf >> VirtualHost >>
    Include /path/to/rewrite.conf

Define a rewrite rule file /path/to/rewrite.conf
All set. Ok now the details on rewrite rules:

#This says that rewrite engine is on. This can be configured in httpd.conf as well.
RewriteEngine   On

#for debugging only
RewriteLog logs/rewrite.log
RewriteLogLevel 9

#check if a condition is true:
RewriteCond %{HTTP_HOST} ^local.xyz.com$

#if true above then only apply the below rule(s).
RewriteRule    ^/?$          /journal/index.html [PT]

#RewriteRule    has the syntax RewriteRule
Pattern Substitution [flags]

The important flags are:

L - Stop the rewriting process here and don't apply any more
rewriting rules
R - Redirect. Must have 'L' flag usually with this(to stop processing further)
N - Re-run the rewriting process
P -This flag forces the substitution part to be internally
forced as a proxy request and immediately
NC - No case .This makes the Pattern case-insensitive
PT - pass through to next handler . Works with alias..Used rarely??.

Lots more on Configuration Directives for apache rewrite rules go here:

Gotcha : To apply a rewrite rule based on the request parameter you *have* to use
RewriteCond  %{QUERY_STRING} ^param=value
By default the RewriteRule does not apply for request parameter

On ISAPI rewrite rules for IIS:

Though it is supposed to be a clone of apache mod_rewrite to help IIS do the redirections there are some differences. There are more ISAPI_Rewrite directives for IIS like RewriteHeader ,etc
More or less the syntax match (thank god) and should be easy if u know apache rewrites.

More on IIS rewrite rules here