wong karo tas kertas ing sirahe
Dina iki, sawise nganyari Catalina saka 15.6 kanggo 15.7, kacepetan Internet dropped, ana akeh loading jaringan, lan aku mutusaké kanggo katon ing aktivitas jaringan.
Aku mbukak tcpdump sajrone sawetara jam:
sudo tcpdump -k NP > ~/log Lan bab pisanan sing narik kawigatenku:
16:43:42.919443 () ARP, Request who-has 192.168.1.51 tell 192.168.1.1, length 28
16:43:42.927716 () ARP, Request who-has 192.168.1.52 tell 192.168.1.1, length 28
16:43:42.934112 () ARP, Request who-has 192.168.1.53 tell 192.168.1.1, length 28
16:43:42.942328 () ARP, Request who-has 192.168.1.54 tell 192.168.1.1, length 28
16:43:43.021971 () ARP, Request who-has 192.168.1.55 tell 192.168.1.1, length 28Napa dheweke butuh kabeh jaringan lokalku? Iku mindai endlessly saben menit 192.168.1./255, oke, ayo kang ngomong iki layanan browser jaringan.
(shadowserver.org) - organisasi keamanan nirlaba
16:43:33.518282 () IP scan-05l.shadowserver.org.33567 > 192.168.1.150.rsync: Flags [S], seq 1527048226, win 65535, options [mss 536], length 0knocker liyane (scanner-12.ch1.censys-scanner.com -> censys.io):
16:44:16.254073 () IP scanner-12.ch1.censys-scanner.com.62651 > 192.168.1.150.8843: Flags [S], seq 1454862354, win 1024, options [mss 1460], length 0Oke, oke, kayane ora ana sing khusus: analytics, mindhai jaringan lokal, nggih, biasanipun, nanging banjur babagan iki:
16:15:56.603292 () IP 45.129.33.152.51777 > 192.168.1.150.jpegmpeg: Flags [S], seq 2349838714, win 1024, options [mss 536], length 0Yen sampeyan pindhah menyang alamat IP iki , sampeyan bisa ndeleng iki:
File teks ngemot jutaan alamat IP kanthi port.
Isi file temp:
[?1h=[?25l[H[J[mtop - 21:17:26 up 31 days, 6:44, 1 use[m[39;49m[m[39;49m[K
Tasks:[m[39;49m[1m 144 [m[39;49mtotal,[m[39;49m[1m 1 [m[39;49mrunning,[m[39;49m[1m 143 [m[39;49msleep[m[39;49m[m[39;49m[K
%Cpu(s):[m[39;49m[1m 0.8 [m[39;49mus,[m[39;49m[1m 0.0 [m[39;49msy,[m[39;49m[1m 0.0 [m[39;49mni,[m[39;49m[1m 92.0[m[39;49m[m[39;49m[K
KiB Mem :[m[39;49m[1m 32681700 [m[39;49mtotal,[m[39;49m[1m 18410244 [m[39;49mfree,[m[39;49m[m[39;49m[K
KiB Swap:[m[39;49m[1m 16449532 [m[39;49mtotal,[m[39;49m[1m 16449288 [m[39;49mfree,[m[39;49m[m[39;49m[K
[K
[7m PID USER PR NI VIRT RES [m[39;49m[K
[m 1 root 20 0 191072 3924 [m[39;49m[K
[m 2 root 20 0 0 0 [m[39;49m[K
[m 3 root 20 0 0 0 [m[39;49m[K
[m 5 root 0 -20 0 0 [m[39;49m[K
[m 7 root rt 0 0 0 [m[39;49m[K
[m 8 root 20 0 0 0 [m[39;49m[K
[m 9 root 20 0 0 0 [m[39;49m[K
[m 10 root rt 0 0 0 [m[39;49m[K
[m 11 root rt 0 0 0 [m[39;49m[K
[m 12 root rt 0 0 0 [m[39;49m[K
[m 13 root 20 0 0 0 [m[39;49m[K
[m 15 root 0 -20 0 0 [m[39;49m[K
[m 16 root rt 0 0 0 [m[39;49m[K[H[mtop - 21:17:29 up 31 days, 6:44, 1 use[m[39;49m[m[39;49m[K
%Cpu(s):[m[39;49m[1m 0.0 [m[39;49mus,[m[39;49m[1m 0.0 [m[39;49msy,[m[39;49m[1m 0.0 [m[39;49mni,[m[39;49m[1m100.0[m[39;49m[m[39;49m[K
KiB Mem :[m[39;49m[1m 32681700 [m[39;49mtotal,[m[39;49m[1m 18409876 [m[39;49mfree,[m[39;49m[m[39;49m[K
[K
Lan pungkasane, akeh pitakon sing ora dingerteni:
16:16:07.022910 () IP 059148253194.ctinets.com.58703 > 192.168.1.150.4244: Flags [S], seq 2829545743, win 1024, options [mss 536], length 0
16:15:57.133836 () IP 45.129.33.2.55914 > 192.168.1.150.39686: Flags [S], seq 700814637, win 1024, options [mss 536], length 0
16:15:56.603292 () IP 45.129.33.152.51777 > 192.168.1.150.jpegmpeg: Flags [S], seq 2349838714, win 1024, options [mss 536], length 0
16:16:15.083755 () IP 45.129.33.154.55846 > 192.168.1.150.7063: Flags [S], seq 4079154719, win 1024, options [mss 536], length 0
16:15:43.251305 () IP 192.168.1.150.60314 > one.one.one.one.domain: 3798+ PTR? 237.171.154.149.in-addr.arpa. (46)
16:16:24.386628 () IP 45.141.84.30.50763 > 192.168.1.150.12158: Flags [S], seq 572523718, win 1024, options [mss 536], length 0
16:16:44.817035 () IP 92.63.197.66.58219 > 192.168.1.150.15077: Flags [S], seq 4012437618, win 1024, options [mss 536], length 0
16:15:43.172042 () IP 45.129.33.46.51641 > 192.168.1.150.bnetgame: Flags [S], seq 362771723, win 1024, options [mss 536], length 0
16:17:02.120063 () IP 45.129.33.23.42275 > 192.168.1.150.11556: Flags [S], seq 3354007029, win 1024, options [mss 536], length 0
16:16:00.589816 () IP 45.129.33.3.56005 > 192.168.1.150.40688: Flags [S], seq 2710391040, win 1024, options [mss 536], length 0Yen aku mblokir domain lan alamat IP kasebut ing file host, banjur ing dump sabanjure bakal ana subnet IP sing padha, nanging kanthi alamat pungkasan sing beda, lan subdomain saka domain kasebut diganti.
Mac ora ngerti topeng ing file host *.example.com
Aku ora ngerti carane ndeleng paket sing ditransfer lan proses utawa daemon apa sing nyebabake sambungan kasebut (Aku duwe Mac sawetara dina), nanging wis nyenengake!
Source: www.habr.com