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I'm on that all-you-can-eat tariff with Three as well, but tethered data is normally limited to 30GB/month or so. Did you make any account changes to get unlimi
by RossM 9y ago
I'm on that all-you-can-eat tariff with Three as well, but tethered data is normally limited to 30GB/month or so. Did you make any account changes to get unlimited or are you bypassing the tethering detection? I haven't seen unlimited tether plans, but it would mean I could work virtually anywhere.
- baby 9y agoChange your ttl to 65 and you'll be fine
- ahakki 9y agoCould you expand on this? I have always wondered how carriers recognize tethering vs normal use.
- pferde 9y agoThe TTL (time-to-live) field of outgoing packets is one of the ways to detect when someone has another device behind the connected device (phone). The traffic from this device has an extra hop to go through, so TTL of every TCP packet will be decreased by one, compared to packets originating from the phone, when it reaches the ISP. This, together with the fact that default TTL different OSes set for packets they send is well known, and virtually no user ever changes these defaults, means that if the ISP detects different packets with TTL for example 64 and 63 coming from you, you very likely have something tethered to your phone. There are tools like https://github.com/p0f/p0f https://github.com/p0f/p0f (it does much more, than just this, though) to make exploiting this technique easy. I remember we used p0f to detect unauthorized connection sharing in a certain university dorm network, and caught quite a few people.