On 07/16/2011 05:40 AM, Jatin K wrote: > On Saturday 16 July 2011 10:18 AM, g wrote: >> On 07/16/2011 04:25 AM, Jatin K wrote: >> <> >> >>> Sorry, that was my mistake :-( >> >> that happens. but does make things difficult to help. >> >>> actually I got the solution what was needed, from this list. >> >> and was so noted. wherein, a little more info would be nice. >> >> did blocking work with; >> >> [1] iptables -A INPUT ! -s 172.16.158.111 -p tcp --dport 21 -j DROP >> or >> [2] iptables -A INPUT -s ! 172.16.158.111 -p tcp --dport 21 -j DROP >> >> syntax tends to indicate that [2] is correct, as [1] would tend to >> indicate "NOT source". > > > [2] worked for me this is what i recall having used, and more logical. > ...by the way we need to indicate ! like '!' ( in > single quote) > > iptables -A INPUT -s '!' 172.16.158.111 -p tcp --dport 21 -j DROP this is not as i recall using, nor is it as such in man page or in 'Red Hat Linux Firewalls'. in man page, when shown as an option, [!] is used. when in description, "!" is used. (with 2 exceptions) in 'Red Hat Linux Firewalls', examples are show without quotes. so, [1] did you find without single quote to not work and then tried with single quotes? or, [2] are you using "echo" to send line to iptables? and please, excuse my questioning, as at this time i do not have a networking system available to experiment with, and your answers will help when i do. thank you. -- peace out. tc.hago, g . **** in a free world without fences, who needs gates. ** help microsoft stamp out piracy - give linux to a friend today. ** to mess up a linux box, you need to work at it. to mess up an ms windows box, you just need to *look* at it. ** The installation instructions stated to install Windows 2000 or better. So I installed Linux. ** learn linux: 'Rute User's Tutorial and Exposition' http://rute.2038bug.com/index.html 'The Linux Documentation Project' http://www.tldp.org/ 'LDP HOWTO-index' http://www.tldp.org/HOWTO/HOWTO-INDEX/index.html 'HowtoForge' http://howtoforge.com/ ****
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