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i have linux, umbunto10.4 and need to disable firewall and proxy in order to access internet and emails etc. I need my laptop for work/email and cannot use it now, can someone help me to resolve this asap please and thank you so much
From your problem I'm assuming that you are using a firewall but have not configured it properly. for example when you install firestarter (a gui firewall) the default settings will ensure that all traffic out of your computer is not affected and only what you want is allowed in. yet if you change this setting so that even outgoing traffic is blocked, you can basically not access the internet at all. the fact that disabling the firewall is allowing you to access the internet points to this.
considering that firestarter is the most common firewall tool I am assuming that you have this in your system. check under policy. the outbound traffic policy should have the "permissive by default" checked. the inbound traffic policy should also not have any rules. this is the default setting, and is more than enough for most cases.