[SOVLED by '!' ]how to specify IP not equal to in iptables rules ????

[g]

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
.

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