Am Fre, 2003-08-15 um 18.46 schrieb Payal Rathod: > On Wed, Aug 13, 2003 at 09:22:25AM +0200, Ralf Spenneberg wrote: > > --dport requires the definition of a protocol beforehand. It is only > > defined when the protocol is either udp or tcp. Omitting the protocol or > > using all does not work because icmp, esp, ah, etc. do not have a port. > > Ok. Got it now. Thanks a lot Ralf for the excellent mails so far. > > > Book: Intrusion Detection f?r Linux Server http://www.spenneberg.com > > Why is this ? in "f?r Linux Server" It is the german word fuer. ue is a german umlaut. One character spelled Ü. This is a german book I wrote last year. You will find several chapters online. But they are german because so far I have not found an english/american publisher willing to publish it. Cheers, Ralf -- Ralf Spenneberg RHCE, RHCX Book: Intrusion Detection für Linux Server http://www.spenneberg.com IPsec-Howto http://www.ipsec-howto.org Honeynet Project Mirror: http://honeynet.spenneberg.org