Sniffer, Spoofer & Portscanner

It's not necessarily an evil intention behind these actions: it's fully legit to check your own network for possible vulnerabilities. Maybe some intruder is already inside? Or there's some service running that shouldn't be? Did the admin forget to close some port in the firewall?

From scanning foreign networks without explicit permission you should refrain, though. Not only this could trigger some (false?) alert (as nobody would have expected your action), but also could have legal consequences. Oh: and don´t forget to be aware of „sniffers“ riding piggy-back on the apps (ad/analytics modules calling home)

In case those words don't mean anything to you, some short explanations:

Sniffing: intercept and log traffic passing over a digital network
Spoofing: pretend to be someone/something different than you are (masquerade as another by falsifying data)
Portscan: Looking for the "open barn door" (which ports are open?)

Network Sniffer

2021-07-15

Postern (4.1@5,771) 4 $Contains no trackers known to us \o/$ LastUpdate: 2018-10-27
HttpCanary — HTTP Sniffer/Capture/Analysis (4.1@5,102) Ǥ 8 $Contains no trackers known to us \o/$ / HttpCanary (Premium) (3.6@708; ~EUR 6.00) Ǥ 6 $Contains no trackers known to us \o/$ User Manual
Sniffer Wicap Demo (3.8@1,908) Ǥ 12 $Contains no trackers known to us \o/$ / Sniffer Wicap Pro (4@277; ~EUR 7.50) Ǥ 13 $Contains no trackers known to us \o/$
TestelDroid (3.6@16) 8 $Contains no trackers known to us \o/$ LastUpdate: 2017-03-27
Packet Capture (3.4@5,069) Ǥ 7 3 LastUpdate: 2019-12-26
tPacketCapture (3.1@1,303) 3 $Contains no trackers known to us \o/$ LastUpdate: 2015-02-06 / tPacketCapture Pro (3.9@39; ~EUR 10.00) 3 $Contains no trackers known to us \o/$ LastUpdate: 2015-02-06
PCAPdroid - no-root network capture (3.1@7) 9 $Contains no trackers known to us \o/$ Github; Kurzvorstellung 2/2021: Mike's »App des Monats«
Sniffer Proxymon [ROOT] (3@408) Ǥ 8 $Contains no trackers known to us \o/$ transparent proxy
RRCpacketSniffer (2.4@11) 3 $Contains no trackers known to us \o/$ LastUpdate: 2015-11-30
BLE-Monitor (0@0) 6 $Contains no trackers known to us \o/$ Github
NetCloud (0@0) 4 $Contains no trackers known to us \o/$ LastUpdate: 2018-10-15 Github; proxy and package capturer
k3pler (0@0) 2 $Contains no trackers known to us \o/$ LastUpdate: 2019-07-02 Github; network connection blocker and packet analyzer

Network Spoofer

2021-07-15

Change My Mac Lite (4.3@1,301) Ǥ 10 3 / Change My MAC - Spoof Wifi MAC (4.1@7,332) Ǥ 10 3
Device ID Masker Free [Xposed] (4.2@24) 6 2 LastUpdate: 2018-06-13 requires XPosed framework
Device Emulator (4.1@566) 6 3 LastUpdate: 2018-02-07 requires XPosed framework
Wi-Fi Privacy Police (3.9@1,204) 5 $Contains no trackers known to us \o/$ LastUpdate: 2016-10-08 Github; Vorstellung 1/2015; protects against WiFi tracking
[root] Pry-Fi (3.8@6,893) Ǥ 10 $Contains no trackers known to us \o/$ LastUpdate: 2014-02-17 Vorstellung 2/2014; Intro 2/2014; Test 3/2014; protects against being WiFi-sniffed
ID Changer Exposed [No Reboot] (3.7@116) Ǥ 14 2 LastUpdate: 2017-07-02 IMEI, AndroidID, MACs
Wifi Mac Changer (3.6@9,845) 5 1 LastUpdate: 2018-10-21
Phone Id Changer (3.6@2,191) 8 3 LastUpdate: 2017-03-18 change IDs shown to current WiFi
MacSpoofer ALPHA version (3.6@297) 4 $Contains no trackers known to us \o/$ LastUpdate: 2013-12-26
Ghost Phone (3.3@1,510) 4 1 LastUpdate: 2018-10-16 MediaTek IMEI/MAC changer
WiFi Spoofer (2.4@544) 3 3 LastUpdate: 2015-08-10
Network Ghost (0@0) 3 $Contains no trackers known to us \o/$ LastUpdate: 2016-09-01 Github; randomize MAC addresses

Port Scanner

2021-07-15

Network Scanner (4.7@10,888) Ǥ 9 1
Network IP Scanner (4.5@4,378) Ǥ 10 3
Network Tools Library Sample (4.4@28) 1 $Contains no trackers known to us \o/$ Github; ping, WOL, portscan
Network Scanner (4.3@17,426) Ǥ 10 3
PortDroid - Network Analysis Kit & Port Scanner (4.3@1,398) Ǥ 9 2
Network Tool (4.3@122) Ǥ 5 2 LastUpdate: 2018-10-27
NetX Network Tools (4.2@9,038) 12 $Contains no trackers known to us \o/$
Net Scan (4.2@8,183) Ǥ 8 1 LastUpdate: 2018-11-02
Port Authority - LAN Host Discovery & Port Scanner (4.2@1,100) 5 $Contains no trackers known to us \o/$ / Port Authority (0@0) 5 $Contains no trackers known to us \o/$ Github
Network Mapper (4.2@258; ~EUR 1.25) 7 $Contains no trackers known to us \o/$ LastUpdate: 2018-01-13
SharesFinder (4.1@1,211) 6 $Contains no trackers known to us \o/$ LastUpdate: 2013-07-20 scanning wireless local networks for shared resources (SMB, FTP, HTTP) and accessing them
Angry Port Scanner (4@941) Ǥ 6 2 LastUpdate: 2018-03-25
Port Scanner (3.9@1,571) 4 2 LastUpdate: 2018-02-10 / Port Scanner Donate (4.4@16; ~EUR 3.00) 4 $Contains no trackers known to us \o/$ LastUpdate: 2018-02-10
DanPortScan (Net Port Scanner) (3.9@7) 1 $Contains no trackers known to us \o/$ LastUpdate: 2017-03-30
CCTV Port Scanner (3.8@675) Ǥ 5 3 LastUpdate: 2019-01-15
Port Scanner (3.8@80) 2 1 LastUpdate: 2016-08-29
Network Scanner & Port Monitor (3.8@20) 5 $Contains no trackers known to us \o/$ LastUpdate: 2018-12-29
NDroidMap (3.6@94) 4 $Contains no trackers known to us \o/$ LastUpdate: 2018-03-02 NMap frontend
devolo NetScanner (3.5@233) 6 1 LastUpdate: 2018-03-13
UDP Port Scanner Beta (3.3@173) 4 LastUpdate: 2016-08-02
Port Scanner (3.3@15) 2 1 LastUpdate: 2016-08-13
TCP Port Scanner (3.2@9) 3 $Contains no trackers known to us \o/$ LastUpdate: 2018-10-04
PortScanner (0@0) 1 $Contains no trackers known to us \o/$ Github
Vernet (0@0) 4 $Contains no trackers known to us \o/$ Github

Protection agains WiFi attacks

2021-07-19

ARP Guard (WiFi Security) (4.5@10,194) Ǥ 14 $Contains no trackers known to us \o/$
NetCut (4.4@44) Ǥ 9 9
WiFi ARP Guard (4.2@203) 5 2 LastUpdate: 2017-05-16
WiFiGuard (3.9@229) 4 $Contains no trackers known to us \o/$ LastUpdate: 2014-09-15
ArpAndroid (3.5@11) 4 $Contains no trackers known to us \o/$ LastUpdate: 2015-06-15

Further Readings:

App Verbindungen mitschneiden auf Android und iOS (4/2016)

2021-07-23

IzzyOnDroid