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

2020-10-23

Postern (4.2@5,743) 4 $Contains no trackers known to us \o/$ LastUpdate: 2018-10-27
HttpCanary — HTTP Sniffer/Capture/Analysis (4.1@4,464) Ǥ 9 $Contains no trackers known to us \o/$ / HttpCanary (Premium) (3.8@626; ~EUR 6.00) 7 $Contains no trackers known to us \o/$ User Manual
Debug Proxy (4.1@333) Ǥ 7 1 LastUpdate: 2018-01-06 transparent proxy
Sniffer Wicap Demo (3.8@1,858) Ǥ 12 $Contains no trackers known to us \o/$ / Sniffer Wicap Pro (4.3@261; ~EUR 8.00) Ǥ 13 $Contains no trackers known to us \o/$
PCAPdroid - PCAP dump without root (3.7@15) 3 $Contains no trackers known to us \o/$ Github
TestelDroid (3.6@16) 7 $Contains no trackers known to us \o/$ LastUpdate: 2017-03-27
Packet Capture (3.3@4,513) Ǥ 7 4
Sniffer Proxymon [ROOT] (3.3@350) Ǥ 8 $Contains no trackers known to us \o/$ transparent proxy
tPacketCapture (2.9@1,262) 3 $Contains no trackers known to us \o/$ LastUpdate: 2015-02-06 / tPacketCapture Pro (3.9@38; ~EUR 10.00) 3 $Contains no trackers known to us \o/$ LastUpdate: 2015-02-06
RRCpacketSniffer (2.4@11) 3 $Contains no trackers known to us \o/$ LastUpdate: 2015-11-30
NetCloud (0@0) 4 $Contains no trackers known to us \o/$ LastUpdate: 2018-10-15 Github; proxy and package capturer
k3pler (0@0) 2 $Contains no trackers known to us \o/$ Github; network connection blocker and packet analyzer

Network Spoofer

2020-10-23

Device ID Masker Free [Xposed] (4.2@24) 7 2 LastUpdate: 2018-06-13 requires XPosed framework
Device Emulator (4.1@566) 6 3 LastUpdate: 2018-02-07 requires XPosed framework
Change My Mac Lite (4@1,133) Ǥ 10 4 / Change My MAC - Spoof Wifi MAC (4.1@6,698) Ǥ 10 5
Wi-Fi Privacy Police (3.9@1,205) 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@6,815) 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
Wifi Mac Changer (3.7@9,541) 5 1 LastUpdate: 2018-10-21
Device Info & ID Changer (3.7@116) Ǥ 14 2 LastUpdate: 2017-07-02 IMEI, AndroidID, MACs
Device Id IMEI Changer Xposed (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
MACCHANGER MEDIATEK (3.6@14) 7 1 LastUpdate: 2016-06-28
Ghost Phone (3.3@1,342) 4 2 LastUpdate: 2018-10-16 MediaTek IMEI/MAC changer
WiFi Spoofer (2.8@526) 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

2020-10-23

Network Scanner (4.4@16,804) Ǥ 10 3
Network Scanner (4.4@8,061) Ǥ 10 4
Network IP Scanner (4.4@3,315) Ǥ 10 4
Port Authority - LAN Host Discovery & Port Scanner (4.4@922) 5 $Contains no trackers known to us \o/$ / Port Authority (0@0) 5 $Contains no trackers known to us \o/$ Github
NetX Network Tools (4.3@8,769) 12 $Contains no trackers known to us \o/$
Network Tool (4.3@117) Ǥ 5 3 LastUpdate: 2018-07-05
Network Tools Library Sample (4.3@22) 1 $Contains no trackers known to us \o/$ Github; ping, WOL, portscan
Net Scan (4.2@8,115) Ǥ 8 1 LastUpdate: 2018-11-02
Network Mapper (4.2@259; ~EUR 1.25) 7 $Contains no trackers known to us \o/$ LastUpdate: 2018-01-13
SharesFinder (4.1@1,212) 5 $Contains no trackers known to us \o/$ LastUpdate: 2013-07-20 scanning wireless local networks for shared resources (SMB, FTP, HTTP) and accessing them
PortDroid - Network Analysis Kit & Port Scanner (4@1,158) Ǥ 8 2
Port Scanner (3.9@1,512) 4 2 LastUpdate: 2018-02-10 / Port Scanner Donate (4.2@13; ~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
Angry Port Scanner (3.8@828) Ǥ 6 3 LastUpdate: 2018-03-25
CCTV Port Scanner (3.8@672) Ǥ 5 4 LastUpdate: 2019-01-15
Network Scanner & Port Monitor (3.8@20) 5 $Contains no trackers known to us \o/$ LastUpdate: 2018-12-29
NDroidMap (3.7@81) 4 $Contains no trackers known to us \o/$ LastUpdate: 2018-02-28 NMap frontend
Port Scanner (3.7@79) 2 1 LastUpdate: 2016-08-29
devolo NetScanner (3.3@212) 6 1 LastUpdate: 2018-03-13
UDP Port Scanner Beta (3.3@161) 3 1 LastUpdate: 2016-08-02
Port Scanner (3.3@15) 2 1 LastUpdate: 2016-08-13
TCP Port Scanner (2.8@9) 3 $Contains no trackers known to us \o/$ LastUpdate: 2018-10-04

Protection agains WiFi attacks

2020-10-23

ARP Guard (WiFi Security) (4.5@9,396) Ǥ 15 $Contains no trackers known to us \o/$
NetCut (4.4@44) Ǥ 11 9 LastUpdate: 2019-03-26
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
ARP Security (3.4@10) 4 $Contains no trackers known to us \o/$ LastUpdate: 2015-06-06

Further Readings:

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

2020-10-24

IzzyOnDroid