ftp question

checking my logs i started getting things like below. What should i do about this? as far as i can tell they havnt gotten in but id like to know how i can prevent them from doing that if at all possible. i dont think i can though. what would you guys do?

http://img385.imageshack.us/img385/9962/ftphz4.png

whois on p15198425.pureserver.info returned nothing
pinging p15198425.pureserver.info returned the ipaddy: 212.227.92.14

whois for the ip address returned is:
% This is the RIPE Whois query server #2.
% The objects are in RPSL format.
%
% Note: the default output of the RIPE Whois server
% is changed. Your tools may need to be adjusted. See
% http://www.ripe.net/db/news/abuse-pr...-20050331.html
% for more details.
%
% Rights restricted by copyright.
% See http://www.ripe.net/db/copyright.html

% Note: This output has been filtered.
% To receive output for a database update, use the "-B" flag

% Information related to '212.227.68.0 - 212.227.108.255'

inetnum: 212.227.68.0 - 212.227.108.255
netname: SCHLUND-CUSTOMERS
descr: Schlund + Partner AG
descr: NCC#1999110113
country: DE
admin-c: UI-RIPE
tech-c: UI-RIPE
rev-srv: ns.schlund.de
rev-srv: ns2.schlund.de
status: ASSIGNED PA
mnt-by: SCHLUND-MNT
source: RIPE # Filtered

role: Schlund NCC
address: Schlund + Partner AG
address: Brauerstrasse 48
address: D-76135 Karlsruhe
address: Germany
remarks: For abuse issues, please use only abuse@schlund.com
remarks: For NOC issues, please look at our AS 8560
phone: +49 721 91374 50
fax-no: +49 721 91374 20
e-mail: abuse@schlund.com
admin-c: SPNC-RIPE
tech-c: SPNC-RIPE
nic-hdl: UI-RIPE
mnt-by: SCHLUND-MNT
source: RIPE # Filtered

% Information related to '212.227.0.0/16AS8560'

route: 212.227.0.0/16
descr: SCHLUND-PA-2
origin: AS8560
mnt-by: SCHLUND-MNT
source: RIPE # Filtered