dns name based redirection

I run dnscache at home and tonight (Sat Nov 24 04:53:51 EST 2001) decided to shut off AIM ads, maybe replace their ad with whatever image I wanted to serve from my own server. Replacing their ads is step two; for now I've learned they just display a generic AOL logo when your host is unable to reach theirs.

If you ever have a need or are interested in redirecting someone's dns, it's fairly simple to set up.

Assumed:

dnscache already installed and running on ethX
127.0.0.53 interface setup (or other ip with port 53 free)
tinydns rpm or binaries installed 

# 1. cd to starting point
cd /var/services/tinydns/
# 2. tell tinydns to send/receive just from its own interface
echo 127.0.0.53 > env/IP
cp env/IP env/IPSEND
# 3. cd to main data directory
cd root/
# 4. make this a root server. this line creates A, PTR, SOA, NS, ...
echo ".:127.0.0.53:a" >> data
# 5. add A record to whatever IP you want, here the normal loopback
echo "+ads.web.aol.com:127.0.0.1" >> data
# 6. add to cdb
make
# 7. jump over to dnscache
cd /var/services/dnscache/root/servers/
# 8. forward all ads.web.aol.com queries to the server 127.0.0.53
echo 127.0.0.53 > ads.web.aol.com
# 9. test it out, restart stuff if it doesn't work
host -t any ads.web.aol.com 127.0.0.53
With regards to my initial goal of replacing AIM ads instead of just disabling them, in Apache I'll probably do something like... 
<VirtualHost ads.web.aol.com>
        RewriteEngine on 
        RewriteRule /image/(.*)    /aimtemplate.gif
</VirtualHost>

<VirtualHost global.msads.net>
        RewriteEngine on 
        RewriteRule /ads/(.*)    /img/dot_clear.gif
</VirtualHost>

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