You're initiating the traffic on the device but not receiving responses?
 Or are you trying to run a server socket on the device but
off-device originating traffic can't seem to connect?

I don't think there is any firewall on the device, though I wouldn't be
surprised if carriers needed to do some NAT to conserve ipv4 addresses.
 Are you using mobile data or wifi?

R

On Tue, Mar 20, 2012 at 2:09 AM, praveen <[email protected]> wrote:

> Hi,
> I want to know whether any default firewall is there in android(2.3)
> like iptables in Linux, if so is it possible to disable it through my
> application without rooting.
> my application involves sending and receiving packets in a network.
> but am not getting any reply. but the same works perfectly in
> emulator(2.2)
> through the system. but no reply is getting if i load the same apk in
> my android device.
>
> is there any way i can overcome this difficulty?
>
> Thanks in advance
> Praveen.
>
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