question on ubuntu firewall


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i decided to go with ubuntu again after all. i did install gufw which is a front end graphical config for iptables. i made no changes other than to allow transmission p2p on the specified port. i ran a firewall leak test at grc and i passed stealth but failed on allowing ping.

i was then directed to this tutorial : here and i followed the instructions and i successfully passed the leak test now.

my question is how come right off the bat without manual configuration did i not pass the grc test at first ? by my following that guide have a i compromised my system at all ?

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I'm not sure that dropping pings and such is a "best practice" as far as TCP/IP protocol adherence goes.

Sure, it makes you more "stealthy", but not sure it is a huge aid in security.

Make sure you have no unnecessary outward-facing services with open ports (ssh and the like, unless you use them). Keep up-to-date with patches, and you should be alright.

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I'm not sure that dropping pings and such is a "best practice" as far as TCP/IP protocol adherence goes.

Sure, it makes you more "stealthy", but not sure it is a huge aid in security.

Make sure you have no unnecessary outward-facing services with open ports (ssh and the like, unless you use them). Keep up-to-date with patches, and you should be alright.

well after the change i did pass the grc leak test now 100%, so i assume thats a good thing. the only port i have allowed in gufw is for transmission.

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