What does ubuntu use for a firewall?

[debiani386]

Knute Johnson wrote:
>> On Friday 26 January 2007, debiani386 wrote:
>>     
>>> also note that some firewalls will give you options to automatically
>>> allow a process to execute with out permission by the super user (aka
>>> root).
>>>       
>> How about fixing the DATE on your machine???
>>
>> Jan 26th??
>>     
>
> I know that you weren't asking me but ubuntu does something screwy to 
> my clock when I go back to XP, it is off about 6 hours.  I'm in PDT 
> so that isn't the GMT difference.
>
>   

Im wondering what this has to do with firewalls? and furthermore, this 
topic really had nothing to do about firewalls, i just have trial 
software that i rely on heavily and im not about to pay for it (im not 
paying over 100 dollars for software that i badly need). So i end up 
having to set my clock back.

--cj