Anteriormente, estaba configurando un servidor web de prueba en mi red local y, al ordenar el firewall, noté lo siguiente en el registro ( /var/log/ufw.log - Estoy usando UFW en Ubuntu 14.04):
Jul 9 14:17:46 wilf-G560 kernel: [ 7098.779915] [UFW BLOCK] IN=eth0 OUT= MAC=**:**:**:**:**:**:00:13:33:a7:c6:98:08:00 SRC=173.194.137.119 DST=192.168.1.27 LEN=1444 TOS=0x00 PREC=0x00 TTL=61 ID=23785 DF PROTO=TCP SPT=443 DPT=44814 WINDOW=371 RES=0x00 ACK URGP=0
Al buscar la IP de origen 173.194.137.119 se muestra que es uno de los servidores de Google, posiblemente actuando como una araña del motor de búsqueda.
¿Debería esta IP poder acceder a la red local de esta manera? ¿Y qué se puede hacer para prevenirlo (si es necesario prevenirlo)?
EDITAR: Han aparecido más:
Jul 9 14:07:46 wilf-G570 kernel: [ 7098.779915] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=173.194.137.119 DST=192.168.1.27 LEN=1444 TOS=0x00 PREC=0x00 TTL=61 ID=23785 DF PROTO=TCP SPT=443 DPT=44814 WINDOW=371 RES=0x00 ACK URGP=0
Jul 9 14:07:50 wilf-G570 kernel: [ 7102.688464] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=173.194.137.119 DST=192.168.1.27 LEN=1444 TOS=0x00 PREC=0x00 TTL=61 ID=23786 DF PROTO=TCP SPT=443 DPT=44814 WINDOW=371 RES=0x00 ACK URGP=0
Jul 9 18:38:00 wilf-G570 kernel: [23331.391334] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=190.93.246.58 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=55845 DF PROTO=TCP SPT=80 DPT=60500 WINDOW=31 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:01 wilf-G570 kernel: [23331.761791] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=190.93.246.58 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=49408 DF PROTO=TCP SPT=80 DPT=60499 WINDOW=32 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:02 wilf-G570 kernel: [23333.404910] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.19.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=46158 DF PROTO=TCP SPT=80 DPT=48452 WINDOW=38 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:02 wilf-G570 kernel: [23333.643089] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.19.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=46159 DF PROTO=TCP SPT=80 DPT=48452 WINDOW=38 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:03 wilf-G570 kernel: [23333.933479] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.19.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=46160 DF PROTO=TCP SPT=80 DPT=48452 WINDOW=38 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:03 wilf-G570 kernel: [23334.514076] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.19.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=46161 DF PROTO=TCP SPT=80 DPT=48452 WINDOW=38 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:04 wilf-G570 kernel: [23335.085606] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=190.93.246.58 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=55846 DF PROTO=TCP SPT=80 DPT=60500 WINDOW=31 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:04 wilf-G570 kernel: [23335.675592] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.19.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=46162 DF PROTO=TCP SPT=80 DPT=48452 WINDOW=38 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:05 wilf-G570 kernel: [23335.776453] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=190.93.246.58 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=49409 DF PROTO=TCP SPT=80 DPT=60499 WINDOW=32 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:07 wilf-G570 kernel: [23337.997768] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.19.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=46163 DF PROTO=TCP SPT=80 DPT=48452 WINDOW=38 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:14 wilf-G570 kernel: [23345.535105] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=54.230.196.88 DST=192.168.1.27 LEN=83 TOS=0x00 PREC=0x00 TTL=56 ID=7910 DF PROTO=TCP SPT=443 DPT=54089 WINDOW=76 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:14 wilf-G570 kernel: [23345.763121] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=54.230.196.88 DST=192.168.1.27 LEN=83 TOS=0x00 PREC=0x00 TTL=56 ID=7912 DF PROTO=TCP SPT=443 DPT=54089 WINDOW=76 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:15 wilf-G570 kernel: [23346.223534] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=54.230.196.88 DST=192.168.1.27 LEN=83 TOS=0x00 PREC=0x00 TTL=56 ID=7913 DF PROTO=TCP SPT=443 DPT=54089 WINDOW=76 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:16 wilf-G570 kernel: [23347.144806] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=54.230.196.88 DST=192.168.1.27 LEN=83 TOS=0x00 PREC=0x00 TTL=56 ID=7914 DF PROTO=TCP SPT=443 DPT=54089 WINDOW=76 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:18 wilf-G570 kernel: [23348.986666] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=54.230.196.88 DST=192.168.1.27 LEN=83 TOS=0x00 PREC=0x00 TTL=56 ID=7915 DF PROTO=TCP SPT=443 DPT=54089 WINDOW=76 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:21 wilf-G570 kernel: [23352.681009] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=54.230.196.88 DST=192.168.1.27 LEN=83 TOS=0x00 PREC=0x00 TTL=56 ID=7916 DF PROTO=TCP SPT=443 DPT=54089 WINDOW=76 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:26 wilf-G570 kernel: [23357.391779] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=190.93.246.58 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=55848 DF PROTO=TCP SPT=80 DPT=60500 WINDOW=31 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:29 wilf-G570 kernel: [23360.069087] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=54.230.196.88 DST=192.168.1.27 LEN=83 TOS=0x00 PREC=0x00 TTL=56 ID=7917 DF PROTO=TCP SPT=443 DPT=54089 WINDOW=76 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:42 wilf-G570 kernel: [23373.010203] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.69 DST=192.168.1.27 LEN=112 TOS=0x00 PREC=0x00 TTL=59 ID=20174 PROTO=TCP SPT=443 DPT=33267 WINDOW=350 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:42 wilf-G570 kernel: [23373.010312] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.69 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=59 ID=20175 PROTO=TCP SPT=443 DPT=33267 WINDOW=350 RES=0x00 ACK FIN URGP=0
Jul 9 18:38:42 wilf-G570 kernel: [23373.309781] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.69 DST=192.168.1.27 LEN=112 TOS=0x00 PREC=0x00 TTL=59 ID=20345 PROTO=TCP SPT=443 DPT=33267 WINDOW=350 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:42 wilf-G570 kernel: [23373.776558] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.69 DST=192.168.1.27 LEN=112 TOS=0x00 PREC=0x00 TTL=59 ID=20578 PROTO=TCP SPT=443 DPT=33267 WINDOW=350 RES=0x00 ACK PSH URGP=0
Jul 9 18:38:43 wilf-G570 kernel: [23374.709408] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.69 DST=192.168.1.27 LEN=112 TOS=0x00 PREC=0x00 TTL=59 ID=21195 PROTO=TCP SPT=443 DPT=33267 WINDOW=350 RES=0x00 ACK PSH URGP=0
Jul 9 18:39:13 wilf-G570 kernel: [23404.339884] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=54.230.196.88 DST=192.168.1.27 LEN=83 TOS=0x00 PREC=0x00 TTL=56 ID=7919 DF PROTO=TCP SPT=443 DPT=54089 WINDOW=76 RES=0x00 ACK PSH URGP=0
Jul 9 18:39:14 wilf-G570 kernel: [23404.849395] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=68.232.34.191 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=60 ID=22175 DF PROTO=TCP SPT=443 DPT=43857 WINDOW=35 RES=0x00 ACK FIN URGP=0
Jul 9 18:39:21 wilf-G570 kernel: [23412.813543] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=68.232.34.191 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=60 ID=22180 DF PROTO=TCP SPT=443 DPT=43857 WINDOW=35 RES=0x00 ACK FIN URGP=0
Jul 9 18:39:46 wilf-G570 kernel: [23437.860462] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=68.232.35.121 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=60 ID=8305 DF PROTO=TCP SPT=443 DPT=35983 WINDOW=33 RES=0x00 ACK FIN URGP=0
Jul 9 18:40:03 wilf-G570 kernel: [23454.085469] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=68.232.35.121 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=61 ID=50379 DF PROTO=TCP SPT=443 DPT=35984 WINDOW=33 RES=0x00 ACK FIN URGP=0
Jul 9 18:40:20 wilf-G570 kernel: [23471.594482] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=68.232.35.121 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=61 ID=63175 DF PROTO=TCP SPT=443 DPT=35993 WINDOW=35 RES=0x00 ACK FIN URGP=0
Jul 9 18:40:42 wilf-G570 kernel: [23493.642084] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.35 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=58 ID=12818 PROTO=TCP SPT=80 DPT=44679 WINDOW=353 RES=0x00 ACK FIN URGP=0
Jul 9 18:41:01 wilf-G570 kernel: [23512.000355] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=68.232.35.121 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=61 ID=3465 DF PROTO=TCP SPT=443 DPT=35989 WINDOW=39 RES=0x00 ACK FIN URGP=0
Jul 9 18:41:25 wilf-G570 kernel: [23536.885696] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=68.232.35.121 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=60 ID=57524 DF PROTO=TCP SPT=443 DPT=35980 WINDOW=41 RES=0x00 ACK FIN URGP=0
Jul 9 18:45:10 wilf-G570 kernel: [23762.184153] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=37.220.108.145 DST=192.168.1.27 LEN=572 TOS=0x00 PREC=0x00 TTL=56 ID=43139 DF PROTO=TCP SPT=443 DPT=34710 WINDOW=40 RES=0x00 ACK PSH URGP=0
Jul 9 18:46:15 wilf-G570 kernel: [23826.362521] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.35 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=58 ID=20928 PROTO=TCP SPT=80 DPT=44794 WINDOW=342 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:15 wilf-G570 kernel: [23826.514952] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.78 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=59 ID=11045 PROTO=TCP SPT=80 DPT=43774 WINDOW=342 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:15 wilf-G570 kernel: [23826.595365] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.35 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=58 ID=21041 PROTO=TCP SPT=80 DPT=44794 WINDOW=342 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:15 wilf-G570 kernel: [23826.829191] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.35 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=58 ID=21146 PROTO=TCP SPT=80 DPT=44794 WINDOW=342 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:15 wilf-G570 kernel: [23827.295850] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.35 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=58 ID=21425 PROTO=TCP SPT=80 DPT=44794 WINDOW=342 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:16 wilf-G570 kernel: [23828.228693] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.35 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=58 ID=22003 PROTO=TCP SPT=80 DPT=44794 WINDOW=342 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:18 wilf-G570 kernel: [23830.094832] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=216.58.208.35 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=58 ID=23250 PROTO=TCP SPT=80 DPT=44794 WINDOW=342 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:47 wilf-G570 kernel: [23858.365082] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=23.67.255.201 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=61 ID=32375 DF PROTO=TCP SPT=80 DPT=40661 WINDOW=587 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:47 wilf-G570 kernel: [23858.607436] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=23.67.255.201 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=61 ID=1873 DF PROTO=TCP SPT=80 DPT=40660 WINDOW=587 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:47 wilf-G570 kernel: [23858.610938] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=23.67.255.201 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=61 ID=32376 DF PROTO=TCP SPT=80 DPT=40661 WINDOW=587 RES=0x00 ACK FIN URGP=0
Jul 9 18:46:47 wilf-G570 kernel: [23858.850655] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=23.67.255.201 DST=192.168.1.27 LEN=52 TOS=0x00 PREC=0x00 TTL=61 ID=1874 DF PROTO=TCP SPT=80 DPT=40660 WINDOW=587 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:36 wilf-G570 kernel: [ 2192.888838] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=103.31.7.34 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=20864 DF PROTO=TCP SPT=80 DPT=34403 WINDOW=30 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:37 wilf-G570 kernel: [ 2193.369941] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=103.31.7.34 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=20865 DF PROTO=TCP SPT=80 DPT=34403 WINDOW=30 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:38 wilf-G570 kernel: [ 2194.330974] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=103.31.7.34 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=20866 DF PROTO=TCP SPT=80 DPT=34403 WINDOW=30 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:40 wilf-G570 kernel: [ 2196.252933] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=103.31.7.34 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=20867 DF PROTO=TCP SPT=80 DPT=34403 WINDOW=30 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:42 wilf-G570 kernel: [ 2198.792958] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.16.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=44069 DF PROTO=TCP SPT=80 DPT=55730 WINDOW=135 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:42 wilf-G570 kernel: [ 2199.022927] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.16.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=44070 DF PROTO=TCP SPT=80 DPT=55730 WINDOW=135 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:43 wilf-G570 kernel: [ 2199.483383] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.16.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=44071 DF PROTO=TCP SPT=80 DPT=55730 WINDOW=135 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:44 wilf-G570 kernel: [ 2200.107845] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=103.31.7.34 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=20868 DF PROTO=TCP SPT=80 DPT=34403 WINDOW=30 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:44 wilf-G570 kernel: [ 2200.574803] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.16.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=44072 DF PROTO=TCP SPT=80 DPT=55730 WINDOW=135 RES=0x00 ACK FIN URGP=0
Jul 9 20:51:46 wilf-G570 kernel: [ 2202.246441] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=104.16.16.44 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=44073 DF PROTO=TCP SPT=80 DPT=55730 WINDOW=135 RES=0x00 ACK FIN URGP=0
Jul 9 20:52:20 wilf-G570 kernel: [ 2236.144976] [UFW BLOCK] IN=eth0 OUT= MAC=20:89:84:3b:68:fc:00:13:33:a7:c6:98:08:00 SRC=190.93.246.58 DST=192.168.1.27 LEN=40 TOS=0x00 PREC=0x00 TTL=61 ID=56817 DF PROTO=TCP SPT=80 DPT=50317 WINDOW=30 RES=0x00 ACK FIN URGP=0
El enrutador creo que acaba de abrir el puerto 80 (no se puede configurar en este momento), y no creo que reenvíe los puertos a esta o cualquier otra dirección. También debo agregar que esta es una dirección residencial sin nombre de dominio asociado, sin servidores con sitios web públicos.