Disabling TCP connections

[tony j. podrasky]

How to stop/disable incoming TCP connections.

Hello Everyone;

I'm running Fedora 16 and an old version of Firefox/Mozilla
(this is my favorite/main computer).

I just checked my Fedora 23 box - and it does the same thing
(I've probably run Firefox once or twice for a short while
and really haven't done any surfing with it).

I've noticed, WITHIN SECONDS of bringing up Firefox, I have
a bunch of TCP connections that pop up when I do <netstat -t>.

If I shutdown Firefox, they begin to die off.

Here's a copy of a <netstat -t>

tonyp% netstat -t
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 fedora:53334 ec2-52-10-167-109:https ESTABLISHED
tcp 0 0 fedora:33274 lax28s15-in-f14.1e:http TIME_WAIT
tcp 0 0 fedora:50094 lax31s01-in-f14.1:https ESTABLISHED
tcp 0 0 fedora:33276 lax28s15-in-f14.1e:http ESTABLISHED
tcp 0 0 fedora:52642 proxy09.fedorapro:https ESTABLISHED
tcp 0 0 fedora:40964 67.203.2.67.rdns.:https ESTABLISHED
tcp 0 0 fedora:50100 lax31s01-in-f14.1:https TIME_WAIT
tcp 0 0 fedora:41470 lax31s01-in-f10.1:https ESTABLISHED
tcp 0 0 fedora:32894 72.21.91.29:http ESTABLISHED
tcp 0 0 fedora:39630 lax28s15-in-f3.1e:https ESTABLISHED
tcp 0 0 fedora:33278 lax28s15-in-f14.1e:http TIME_WAIT

Do I need to worry about this - or is it normal procedure for
browsers to connect to these places and give them information?

Can I disable/stop these connections?

[tony j. podrasky · Accepted solution]

The TCP connections are being generated by FIREFOX and THUNDERBIRD. You can assume whatever browser you're using is doing the same thing.

They are forwarding "who knows what" information (data collection) to several sources.

They seem to be benign.

They cannot be disabled because they are embedded in the application.