Thread: how to close ports with GUFW?

hello,
here i'm trying become ubuntu expert, small non profit work, starting zero...i installed gufw firewall, because read on forums firestarter no longer recomended, , gufw easier use.
went shieldsup site, read on forum, , told me have ports open. telnet, ftp, , http. others listed "stealth".
read here "stealth" "drop", , means. learn how close ports gufw. read on 1 site says change "gufw setting to: 12345 allow anywhere". can't find on gufw interface have. how do that?
understand, problem if ports open, right? though read shieldsup site gives "wrong" diagnosis because check router, not computer. still, i'd know how close ports (assuming that's necessary).

also, read "hardware" firewalls better "software" firewalls. have gufw software firewall, right? don't know difference.

shieldsup looking @ router, not pc. router has ports open management, can't stop happening if want manage remotely.

hardware firewall software running on appliance. reason better tuned purpose, , hardned against attacks while software firewall runs on pc (or other computer device) on top of general purpose os has bunch of other software on it. other software problem lies. vulnerability in other software makes firewall useless. software firewall slower since process priority given user functions instead of services.

gufw software firewall in sense run on server or destop.
in end gufw uses iptables actual backend firewall process 90% of hardware firewalls.

in end ok have few services open internet, because need them. helps security if change default port each srvice similar different (ssh 22 -> ssh 2222) helps prevent bot attacks.

if have more questions, happy try , answer them.


edit:
forgot, dont run firewalls on workstations, have found gets in way of doing actual work. rely on filters @ perimeter , intelligent spam filters in email.

not if compromised, when. people go long time without issue, , others don't.

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