CODEWITHSUNDEEP
androidconnectioniptables
Aprel
Aprel

Reputation: 1179

ANDROID : Iptables blocking of incomming connections

I want to block all incoming connections with iptables on my android device. I know that Google apps, like play store, etc. Need some incoming connections (f.e. for GTalkSerivice) and they will be not running after blocking. But I want just use my browser and so I know browser doesn't need incoming connections. So I tried to block all incoming connections with:

iptables -A INPUT --j DROP

The problem is now, that all of connections are blocked and my browser is also off-line. Why is it so?

Upvotes: 1

Views: 3153

Answers (1)

Nikolay Elenkov
Nikolay Elenkov

Reputation: 52936

The thing is, iptables doesn't block connections, but packets. What you've done is block all incoming packets, so it's normal that you get no response. You need to add something like this to let packets form already established connections (ones you have initiated by opening a web page, etc.) through:

iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

Blocking all incoming connections will break a lot of things so use with caution.

Upvotes: 2

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