unwanted printing - cracking?

[lumiwa]

Hi!

My system is FreeBSD 9.0 Release.

I have a HP printer connected through router which works. But the last two days I
found three printed papers:
two are empty and on the one is:
GET http://www.rackspace.com/ HTTP/1.1
Host: www.rackspace.com
User-Agent: Mozilla/4.0 (compatible, MSIE 6.0: Windows NT 5.1)
Axxept: */*
Accept-Language: zh-cn
Connection: Keep-Alive

and on the other two were:
GET http://proxyjudge1.proxyfire.net/fastenv HTTP/1.1
Host: proxyjudge1.proxyfire.net
and the other four lines are the same.

There are nothing in the log files.
I don't have a server and I have pf firewall which I hope works.

Thanks in advance.

Mitja