Firewalls & Co.

A firewall with trackers built-in is like a shelter with unlocked grenades built-in. Just saying.

Bluetooth Firewalls

2021-01-06

Bluetooth Firewall Trial (4.5@1,907) Ǥ 12 3 / Bluetooth Firewall (4.6@897; ~EUR 3.25) 6 $Contains no trackers known to us \o/$ LastUpdate: 2019-01-05
LightningWall (4@125) 5 $Contains no trackers known to us \o/$ LastUpdate: 2017-07-27 Firewall; Tasker support; experimental Bluetooth included; deals with incoming and outgoing connections per interface

Internet Firewalls

2021-01-06

If not specified otherwise, these apps require root.

Savebit (4.5@50) 2 $Contains no trackers known to us \o/$ LastUpdate: 2016-04-09
NetGuard - no-root firewall (4.3@21,012) Ǥ 10 $Contains no trackers known to us \o/$ Github; Intro 10/2015; Vorstellung 11/2015 | 11/2015 | 12/2015; Intro 8/2017; Anleitung 8/2016 | 11/2017 | 9/2018 | 7/2019; Video Anleitung 3/2019 can also block ads
InternetGuard Data Saver Firewall (4.3@13,783) Ǥ 11 3
NoRoot Firewall (4.2@97,374) 4 1 / NoRoot Firewall Beta (4.1@3,184) 6 1 Anleitung 8/2016-1/2020; Video Intro 10/2018; no root required
Postern (4.2@5,769) 4 $Contains no trackers known to us \o/$ LastUpdate: 2018-10-27
DroFireWall (Firewall for All) (4.2@709) 8 2 LastUpdate: 2017-03-26
Firewall Protect Guard (4.2@59) Ǥ 9 2 LastUpdate: 2017-08-24 no root needed
AFWall+ (Android Firewall +) (4.1@9,467) 10 $Contains no trackers known to us \o/$ / AFWall+ (Donate) (4.3@655; ~EUR 7.50) 8 $Contains no trackers known to us \o/$ Github; Einführung & Tutorial 5/2014 (Vertiefung 9/2017) | 4/2019; Wiki; Official Support Page (XDA); Apps einfach über Orbot routen; Video Howto 4/2016; How-To 12/2020; open source continuation of DroidWall
NetPatch Firewall (4.1@753) Ǥ 4 $Contains no trackers known to us \o/$ no root needed; 7-day trial (iAP for full version)
VPN Safe Firewall - Free Proxy (4@1,149) Ǥ 10 5 LastUpdate: 2017-08-06
NetWall-Mini Free | Network Security FireWall (4@234) 4 8 LastUpdate: 2019-05-29
LightningWall (4@125) 5 $Contains no trackers known to us \o/$ LastUpdate: 2017-07-27 Firewall; Tasker support; experimental Bluetooth included; deals with incoming and outgoing connections per interface
Karma Firewall (3.9@655) 2 $Contains no trackers known to us \o/$
LostNet NoRoot Firewall (3.8@3,957) 5 2 LastUpdate: 2014-07-06
Protect Net: safe firewall for android no root (3.8@190) Ǥ 11 3
Mobiwol: NoRoot Firewall (3.6@11,139) Ǥ 17 4 LastUpdate: 2018-04-24 no root required
Connection Tracker (3.6@279) 4 4 LastUpdate: 2014-10-26 Not really a firewall, but rather a connection tracker
NetSaver Pro No Root-Firewall (2.9@17) Ǥ 8 1 LastUpdate: 2017-07-07

Firewalls & more

2021-01-06

Onavo Count | Data Usage (4.4@50) 12 LastUpdate: 2016-10-27 / Onavo Extend | Data Savings (4.2@23,655) 8 LastUpdate: 2015-06-15 incl. traffic-shaping & firewall

Various Firewall related tools

2021-01-06

Knock on Ports (4.7@159) 5 $Contains no trackers known to us \o/$ Github
PortKnocker (4.6@101) 5 $Contains no trackers known to us \o/$ LastUpdate: 2015-04-29
Port Knocker (4.4@203) 3 $Contains no trackers known to us \o/$ LastUpdate: 2018-03-09
Common Port Checker (4.3@15) 1 1 LastUpdate: 2016-08-29
Network Mapper (4.2@258; ~EUR 1.25) 7 $Contains no trackers known to us \o/$ LastUpdate: 2018-01-13
Knock the Port (3.7@55) 1 $Contains no trackers known to us \o/$
Fwd: port forwarder (3.1@449) Ǥ 6 10 LastUpdate: 2018-11-04 Github
Port Checker (2.2@34) Ǥ 4 2
Port Knocker (0@0) 1 $Contains no trackers known to us \o/$ Github

Further Readings:

Category Permissions
Best Android Firewall apps no root access required (2/2019)
Best Firewall Apps for Android (8/2018)
In der Praxis: Firewalls für Android (8/2016 - 1/2020)
Mehr Datenkontrolle durch Firewall-App (4/2016 - 1/2020)

2021-01-13

IzzyOnDroid

Firewalls & Co.

Bluetooth Firewalls

Internet Firewalls

Firewalls & more

Various Firewall related tools