Slackware 10.2 Apache Log file
/var/log/apache/...
Display IP Address
On a remote server to display the IP of the the requesting computer I used this
<?php
$ip = getenv('REMOTE_ADDR');
PRINT("$ip");
?>
You might be able to use http://checkip.dyndns.org:8245/ and clean it up a bit with grep and or sed
Save Page Results as Text File
Using the php page from above on my hosted site, so from my home computer I can use lynx ro return just my IP address, (you use this on the client to store the IP address in a text file).
lynx -dump "http://www.virtual-weltanschauung.com/t3.php" > ip.log
Whereas with a web brower it would simply display the IP number, this puts it wherever you want it.
See my Linux tidbits part http://www.virtual-weltanschauung.com/pmwiki/pmwiki.php?n=Main.Tidbits