lalaki jeung kantong kertas dina sirah na
Dinten, sanggeus ngamutahirkeun Catalina tina 15.6 ka 15.7, speed Internet turun, hal ieu beurat loading jaringan kuring, sarta kuring mutuskeun pikeun nempo aktivitas jaringan.
Kuring ngajalankeun tcpdump pikeun sababaraha jam:
sudo tcpdump -k NP > ~/log
Jeung hal kahiji anu bray panon kuring:
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 28
Naha anjeunna peryogi sadayana jaringan lokal kuring? Ieu nyeken eta endlessly unggal menit 192.168.1./255, oke, hayu urang nyebutkeun ieu layanan browser jaringan.
(shadowserver.org) - organisasi kaamanan 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 0
knocker sejen (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 0
Oke, oke, sigana teu aya anu khusus: analytics, nyeken jaringan lokal, ogé, hal anu biasa, tapi teras kumaha ieu:
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
Upami anjeun angkat ka alamat IP ieu
File téks ngandung jutaan alamat IP sareng palabuhan.
Eusi 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
Tungtungna, sakumpulan patarosan anu teu dipikanyaho:
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 0
Upami kuring meungpeuk domain sareng alamat IP ieu dina file host, maka dina dump salajengna bakal aya subnet IP anu sami, tapi kalayan alamat tungtung anu béda, sareng subdomain tina domain robih.
Mac teu ngartos topeng dina file host *.example.com
Kuring henteu terang kumaha ningali pakét anu ditransfer sareng prosés naon atanapi daemon anu nyababkeun sambungan ieu (Kuring ngagaduhan Mac sababaraha dinten), tapi éta parantos pikaresepeun!
sumber: www.habr.com