Artifical restrictions placed on tethering make it difficult to work from home for those not fortunate to have a high-speed ISP
* Your mobile provider cannot:
** Entirely prove this method (link:https://github.com/RiFi2k/unlimited-tethering[among some others]) is being used
* Your mobile provider can (if no VPN, or Tor, or I2P, or proxy is used):
** Check for specific domains being connected to that only a Windows PC would connect to, but not an Android phone, to assume the current month is all tethered traffic
** Using link:https://en.wikipedia.org/wiki/Deep_packet_inspection[DPI software], traffic can be shaped/tampered/manipulated/throttled based on certain criteria(s), such as Video Streaming (making YouTube videos or Netflix buffer more, some like T-Mobile force lower video quality)
A paid VPN is recommended since it's easy to route all traffic through it, and shouldn't reduce speeds (if the VPN connection is on a device with link:https://en.wikipedia.org/wiki/AES_instruction_set#x86_architecture_processors[AES-NI support])
WARNING: VPNs don't grant privacy, Tor and I2P do; these can easily be used alongside a VPN if desired +
For this guide, VPNs are used for the intention of hiding traffic from your mobile provider, and ensuring web content isn't blocked +
*`Ultimately, usage of a VPN is optional`*
.Good paid VPN providers do the following (includes my VPN provider recommendations)
[%collapsible]
====
* Transparent communication, and all software used is open-source
* Use only dedicated/physical/bare metal servers (faster and more secure than virtual servers, called "VPS" or "VDS")
* Servers are only located in countries with lots of transit capability (for South America, is only Brazil)
* No fake server locations (unless for streaming purposes on specific domains/websites, and is stated as such)
* All server locations allow all forms of traffic except outbound port 25 (to prevent email spam abuse)
* Word of mouth advertising; not shoved in your face by sponsored YouTube videos and Google Ads
* VPN's company is not based in a tax haven country; tax haven = profitability is heavily considered, meaning they'd likely sell your data to earn more profit
* Ability to link:https://airvpn.org/faq/port_forwarding/[select ports to forward] (not just a randomized port on connection, as is the case with PIA/Private Internet Access)
For your own research, avoid all websites recommending VPNs under the parent company "Kape Technologies": https://restoreprivacy.com/private-internet-access-kape-crossrider/
* Recommendations:
. link:https://airvpn.org[AirVPN] | link:https://airvpn.dev[AirVPN #2] | link:http://airvpn3epnw2fnsbx5x2ppzjs6vxtdarldas7wjyqvhscj7x43fxylqd.onion[AirVPN via Tor]
. link:https://mullvad.net[Mullvad] | link:http://o54hon2e2vj6c7m3aqqu6uyece65by3vgoxxhlqlsvkmacw6a7m7kiad.onion[Mullvad via Tor]
. Cryptostorm (best at bypassing VPN blocking due to competitors not having the "port striping" feature, which is link:https://archive.is/6LyZf[documented] on how it's done)
. link:https://www.ovpn.com[OVPN]
TIP: Trust-worthy free VPN providers, but have slow network speeds: +
1. link:https://riseup.net/en/vpn[Riseup] | link:http://vww6ybal4bd7szmgncyruucpgfkqahzddi37ktceo3ah7ngmcopnpyyd.onion/en/vpn[Riseup via Tor] +
2. link:https://cryptostorm.is/wireguard[Cryptostorm] | link:http://kzaeunogz6s75ptgy6ifjzwwy75xdfenenswvrczd7mewxgrad5a.b32.i2p/[Cryptostorm via I2P] (I2P > Tor when available) | link:http://stormwayszuh4juycoy4kwoww5gvcu2c4tdtpkup667pdwe4qenzwayd.onion/wireguard[Cryptostorm via Tor]
"Our free WireGuard server works the same as our "Cryptofree" service: bandwidth is throttled to roughly 160kbps down, 130kbps up. Not fast enough to watch any HD videos, but plenty of bandwidth for sending an email, browsing a website, IRC, etc."
====
WARNING: **Rooting is a very bad idea, as it will entirely break the security model of Android.** +
If you're considering using an unused phone to tether from (which is rooted, and contents were already wiped), check the bands it supports on link:https://www.kimovil.com/[Kimovil].
== Requirements
* Magisk, and by that accord *root*; link:https://github.com/ghost-420/Ez_Magisk[installing Magisk (via recovery)]
* Magisk, and by that accord *root*; link:https://github.com/Iazos/Ez_Magisk[installing Magisk (via recovery)]
* The link:https://f-droid.org/en/packages/com.termux/[Termux] terminal emulator (link:https://wiki.termux.com/wiki/Termux_Google_Play[from F-Droid only])
* Install Busybox Magisk module
* Installing Busybox Magisk module
. Magisk -> Modules (puzzle piece icon)
. Search for 'busybox' to find "Busybox for Android NDK", then install it
== Recommended/optional
* Access to a VPN provider that respects its users (no traffic shaping)
.**Recommended (for root)**
[%collapsible]
====
* Google Play Store, alternatively through link:https://gitlab.com/AuroraOSS/AuroraStore/-/releases[Aurora Store]
* link:https://play.google.com/store/apps/details?id=com.draco.ktweak[KTweak for higher network speeds], using its 'throughput' profile
** link:https://play.google.com/store/apps/details?id=com.draco.ktweak[KTweak for higher network speeds], using its 'throughput' profile
* Kernel with the "xt_HL.ko" module (netfilter's TTL packet mangling) enabled
** Known kernels with support (and seem high-quality):
*** Freak07's link:https://forum.xda-developers.com/t/kernel-23-07-2021-android-11-kirisakura-1-1-8-for-asus-zenfone-8-aka-sake.4295287/[Kirisakura] for ASUS ZenFone 8
If there's no output, the commands succeeded (kernel has "xt_HL.ko" support)
TIP: If your preferred custom kernel does not support `--ttl-set` and `--hl-set`, inform them of this repository +
For kernel tweakers: link:https://web.archive.org/web/20210423030541/https://forum.xda-developers.com/t/magisk-stock-bypass-tether-restrictions.4262265/[an aid with enabling "xt_HL.ko" support through Magisk]
== 1. Configure props
NOTE: ↵ is the kbd:[Enter / Return] key
====
=== Don't meet the root requirement?
* This is the preferred way, if...
** The ROM used explicitly stops Android from snitching:
** Always set TTL to 65 on the devices being tethered to
*** Adjusting TTL alone could work on a few telecoms, but it's meant as a supplemental step for telecoms with smarter detections
NOTE: Some router firmware (Asuswrt-Merlin, DD-WRT, Tomato, OpenWrt) can set TTL for all devices connected to it.
TIP: Skip straight to the "About" section, then "3. Test TTL & HL change on the tethered device"; these are the only root-less sections
== About
* Your telecom cannot:
** Directly prove this method (link:https://github.com/RiFi2k/unlimited-tethering[among some others]) is being used
*** Telecoms do know about this, but the offensive (this guide) is much stronger than the defensive, their defense being: DPI software, and the OS (Android and iOS) telling the telecom that it's tethered +
This guide can solve the OS problem unless it's iOS (buy the latest Google Pixel next time, it has proper firmware & hardware & software security as iPhones do)
* Your telecom can (if no traffic encryptor such as Tor or a VPN is used):
** Check for specific domains being connected to that only a Windows PC or Mac would connect to, but not an Android phone.
** Use link:https://en.wikipedia.org/wiki/Deep_packet_inspection[DPI software] to shape traffic based on certain criteria(s), such as Video Streaming (throttling YouTube videos and/or Netflix, and/or forcing lower video quality)
* A paid VPN is recommended since it's easy to route all traffic through it, and shouldn't reduce speeds, given the following criteria:
** Protocol used is WireGuard (fastest, expect on unreliable links), IKEv2 (best on unreliable links), or SoftEther (reasonably fast and best at bypassing DPI). +
** If the speeds are lower than expected on all protocols, connect to the VPN on a different device, specifically one with link:https://en.wikipedia.org/wiki/AES_instruction_set#x86_architecture_processors[AES-NI supported]
WARNING: VPNs don't grant privacy, Tor and I2P do; these can easily be used alongside a VPN if desired +
For this guide, VPNs are used for the intention of hiding traffic from your telecom, and ensuring web content isn't blocked +
*`Ultimately, usage of a VPN is optional`*
.Good paid VPN providers do the following (and VPN recommendations)
[%collapsible]
====
* Transparent communication
* Use only dedicated/physical/bare metal servers
** Dedis are faster and more secure than virtual servers ("VPS" / "VDS")
** No hard drives installed in the servers is a good bonus
* No fake (geo-located) server locations
** Unless they are stated as such
* All server locations allow all traffic except outbound port 25 (to prevent email spam abuse)
* Ability to link:https://airvpn.org/faq/port_forwarding/[select ports to forward].
** AirVPN, hide.me, and TorGuard have the best implementations of port forwarding
*** link:https://teddit.net/r/VPNTorrents/comments/oqnnrq/list_of_vpns_that_allow_portforwarding_2021/[List of VPNs that allow P2P and Port Forwarding]
* Recommendations based on the above criteria and personal experiences:
. link:https://airvpn.org[AirVPN]
** Mirrors: link:https://airvpn.dev[AirVPN #2] | link:http://airvpn3epnw2fnsbx5x2ppzjs6vxtdarldas7wjyqvhscj7x43fxylqd.onion[AirVPN via Tor]
. link:https://mullvad.net[Mullvad]
** Mirror: link:http://o54hon2e2vj6c7m3aqqu6uyece65by3vgoxxhlqlsvkmacw6a7m7kiad.onion[Mullvad via Tor]
. link:https://hide.me[hide.me] (supports IKEv2 and SoftEther; the other recommendations don't)
====
== 1. Configure props
. Launch Termux
. ``su``
. ``settings delete system tether_entitlement_check_state;settings delete global tether_dun_required``
. ``props``
. `$ su`
. `# settings delete system tether_entitlement_check_state;settings delete global tether_dun_required`
* Disable "battery optimizations" for Termux and Termux:Boot in your phone's Settings
* link:https://f-droid.org/en/packages/com.termux.boot/[Install Termux:Boot] and disable "battery optimizations" for Termux and Termux:Boot in your phone's settings
* Make the script:
. `$ mkdir -p ~/.termux/boot` +
. `$ cd ~/.termux/boot` +
. `$ nano set-tether-ttl.sh`
NOTE: Replace "v4-rmnet_data2" with your network interface if it's different
$ `mkdir -p ~/.termux/boot` +
$ `cd ~/.termux/boot` +
$ `nano set-tether-ttl.sh`
[source, shell]
----
#!/data/data/com.termux/files/usr/bin/sh
su -c "iptables -t mangle -A POSTROUTING -o +rmnet+ -j TTL --ttl-set 64;iptables -t mangle -A POSTROUTING -o rndis+ -j TTL --ttl-set 64;ip6tables -t mangle -A POSTROUTING -o +rmnet+ -j HL --hl-set 64;ip6tables -t mangle -A POSTROUTING -o rndis+ -j HL --hl-set 64"
su -c "iptables -t mangle -A POSTROUTING -o v4-rmnet_data2 -j TTL --ttl-set 64 && \
$ `chmod +x set-tether-ttl.sh; sh set-tether-ttl.sh`
NOTE: If there's no output, the commands succeeded (script works correctly)
* Launch the script:
** `$ chmod +x set-tether-ttl.sh && sh set-tether-ttl.sh`
Termux:Boot will automatically run set-tether-ttl.sh after startup/boot, though it will break if the interface name changes, which I cannot test nor know if this happens on Android, and if it does it may be specific to a ROM
====
.AFWall+ method (will not work on ROMs with their own Firewall app, such as CalyxOS)
.AFWall+ (will not work on ROMs with their own Firewall app, such as CalyxOS)
Anonymous
2 years ago