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On Tue, 6 Aug 2002, Links at Momsview wrote: > Tom, > I''m not sure if you ever saw this document but it describes some of the > reasons you are seeing strange packets > after setting up NEW not SYN > http://www.linuxsecurity.com/resource_files/firewalls/IPTables-Tutorial/ipta > bles-tutorial.html#NEWNOTSYN > > If the section titled " State NEW packets but no SYN bit set" doesn''t appear > do a search for "feature in iptables". > > It describes a bug in the Microsoft IP stack that can cause these packets....

...t least once a week I receive such an attack coming from a different ip. I will read the articles. Thanks again to everyone. Regards, Rodrigo Lang. 2010/6/29 Kenny Watson <kwatson at geniusgroupltd.com> > Hi, you can use fail2ban > http://www.voip-info.org/wiki/view/Fail2Ban+(with+iptables)+And+Asterisk<http://www.voip-info.org/wiki/view/Fail2Ban+%28with+iptables%29+And+Asterisk> > > Which works well, when a pattern is found in a log file it addes in an > iptables rules to block the traffic for a period. > > On debian you can apt-get install fail2ban and on c...

...ill be of interest. On Tue, 6 Aug 2002, Links at Momsview wrote: > Tom, > I''m not sure if you ever saw this document but it describes some of the > reasons you are seeing strange packets > after setting up NEW not SYN > http://www.linuxsecurity.com/resource_files/firewalls/IPTables-Tutorial/ipta > bles-tutorial.html#NEWNOTSYN > Thanks. > > I didn''t notice where the actual ACCEPT was for these connections but I > assume they are on a Port by port basis. > Yes. > PS: I believe there may be some similar issues with the ICMP.DEF rules >...