I have an old android phone, a Samsung Galaxy Y that I am using as a mobile 3G router and there's some things thats bothering me . I have installed Avast antivirus free on the said phone but when I try and turn on the firewall it says IP6 is not supported. I guess this has to do with the Android version on the phone but there's no updates through Samsung to support this feature. I have read a bit about using a custom Rom such as Cyagenmod on the device and I think I'll be trying that out. But, are there other ways I can make it more secure? I have blocked all texts and calls on the phone through the said AV software because I dont want calls on it, but I would like to add a feature to the tethering so I could log in to it using a browser and maybe even access the SD-card and use it as a server. How can I otherwise make the device more secure as a router? It would be great if I could somehow tether it to manage all connections through TOR or similar and a firewall. All experience welcome since I have none myself. I'm dreaming away here but does anyone know of such features or apps to set up?