<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> I see attempts about every other day. Because of this, I send e-mails to ISPs about every other day. After the third offense from within the same range, I block all access to our servers from that range, unless the ISP attempts to correct the problem. I also keep track of all attempts so that I can reference it later in case of a break in. <pre class="moz-signature" cols="72">Nathaniel Hall, GSEC Intrusion Detection and Firewall Technician Ozarks Technical Community College -- Office of Computer Networking <a class="moz-txt-link-abbreviated" href="mailto:halln@otc.edu">halln@otc.edu</a> 417-447-7535 </pre> Gerry Doris wrote: <blockquote cite="mid1102459609.29276.2.camel@jaguar.dorfam.ca" type="cite"> <pre wrap="">On Tue, 2004-12-07 at 15:24, Michael Yep wrote: </pre> <blockquote type="cite"> <pre wrap="">Hello In my LogWatch report I get many login attacks, many from the same IP address. sshd: Authentication Failures: root (218.232.109.187): 59 Time(s) adm (218.232.109.187): 2 Time(s) apache (218.232.109.187): 1 Time(s) nobody (218.232.109.187): 1 Time(s) operator (218.232.109.187): 1 Time(s) Invalid Users: Unknown Account: 43 Time(s) I have permitRootLogin set to NO, and I use strong passwords, but can I just add these IP addresses to hosts.deny? and if so how would I set that up Michael Yep Development / Technical Operations RemoteLink, Inc. </pre> </blockquote> <pre wrap=""> I had so many problems with the 218.0.0.0/24 domain that I totally blocked the entire domain. I believe this domain is in Korea. </pre> </blockquote> </body> </html>