Firewalls & Co.

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

Bluetooth Firewalls

2019-08-22

Bluetooth Firewall Trial (4.6@1,309) Ǥ 12 / Bluetooth Firewall (4.5@687; ~EUR 3.25) 6 Review 12/2013
LightningWall (4@116) 5 $Contains no known trackers \o/$ LastUpdate: 2017-07-27 Firewall; Tasker support; experimental Bluetooth included; deals with incoming and outgoing connections per interface

Internet Firewalls

2019-08-22

If not specified otherwise, these apps require root.

Savebit (4.6@48) 2 $Contains no known trackers \o/$ LastUpdate: 2016-04-09
NoRoot Firewall (4.5@76,830) 3 LastUpdate: 2016-08-31 / NoRoot Firewall Beta (4.4@2,207) 5 LastUpdate: 2016-09-01 Testbericht 12/2013; Review 1/2014 | ?/2014; Intro 2/2014; Anleitung; Video Intro 10/2018; no root required
Postern (4.4@5,502) 4 $Contains no known trackers \o/$
InternetGuard Data Saver Firewall (4.4@4,221) Ǥ 10
LostNet NoRoot Firewall (4.4@3,688) 5 LastUpdate: 2014-07-06
NetGuard - no-root firewall (4.3@12,947) Ǥ 9 Github; Intro 10/2015; Vorstellung 11/2015 | 11/2015 | 12/2015; Anleitung 8/2016 | 11/2017; Video Anleitung 3/2019 can also block ads
AFWall+ (Android Firewall +) (4.2@8,532) 9 / AFWall+ (Donate) (4.6@574; ~EUR 7.50) 8 Github; Kurzvorstellung 12/2012; Vorstellung 11/2012 | 2/2013; Intro 2/2013; Einführung & Tutorial 5/2014 (Vertiefung 9/2017) | 4/2019; Wiki; Official Support Page (XDA); Apps einfach über Orbot routen; Video Howto 4/2016; open source continuation of DroidWall
DroFireWall (Firewall for All) (4.2@709) 8 LastUpdate: 2017-03-26
CIA Firewall - Internet Security Noroot Firewall (4.2@446) Ǥ 9
Karma Firewall (4.2@372) 1 $Contains no known trackers \o/$
Firewall Protect Guard (4.2@59) Ǥ 9 LastUpdate: 2017-08-24 no root needed
NetPatch Firewall (4.1@336) Ǥ 4 $Contains no known trackers \o/$ LastUpdate: 2017-08-01 no root needed; 7-day trial (iAP for full version)
Mobiwol: NoRoot Firewall (4@9,901) Ǥ 17 Test 1/2013; no root required
LightningWall (4@116) 5 $Contains no known trackers \o/$ LastUpdate: 2017-07-27 Firewall; Tasker support; experimental Bluetooth included; deals with incoming and outgoing connections per interface
VPN Safe Firewall - Free Proxy (3.9@946) Ǥ 10 LastUpdate: 2017-08-06
Connection Tracker (3.8@245) 4 LastUpdate: 2014-10-26 Not really a firewall, but rather a connection tracker
NetSaver Pro No Root-Firewall (2.9@17) Ǥ 8 LastUpdate: 2017-07-07

Firewalls & more

2019-08-22

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 Video Review 4/2012 | 11/2012; Review 6/2012; Vorstellung 10/2012; Vorstellung 5/2013; incl. traffic-shaping & firewall

Various Firewall related tools

2019-08-22

Knock on Ports (4.6@32) 4 $Contains no known trackers \o/$ Github
Port Knocker (4.5@161) 3 $Contains no known trackers \o/$
PortKnocker (4.5@93) 5 $Contains no known trackers \o/$ LastUpdate: 2011-05-25
Network Mapper (4.3@250; ~EUR 1.25) 7 $Contains no known trackers \o/$ LastUpdate: 2018-01-13
Common Port Checker (4.3@15) 1 LastUpdate: 2016-08-29
Knock the Port (3.8@46) 1 $Contains no known trackers \o/$
Fwd: port forwarder (3.5@266) Ǥ 6 Github
Port Checker (2.7@22) Ǥ 4

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)
Mehr Datenkontrolle durch Firewall-App (4/2016)

2019-08-23

IzzyOnDroid

Firewalls & Co.

Bluetooth Firewalls

Internet Firewalls

Firewalls & more

Various Firewall related tools