Всем привет!
Имеется Шлюз [eth0-- Шлюз-- eth1]
eth0 (IP-192.168.0.15) смотрит в сеть 192.168.0.0/24
eth1 смотрит в сеть 192.168.7.0/24
В сети 192.168.0.0/24 находится компьютер 192.168.0.33
Межсетевой экран iptables на шлюзе в логах фиксирует следующее:
Mar 7 11:55:05 kernel: [19635.837187] IPT INPUT packet died: IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:00:00:00:00:9a:08$
Используя, утилиту tcpdump видим (мак-адреса изменены мною):
11:55:05.092152 00:00:00:00:00:06 > 00:00:c2:00:00:00, 802.3, length 60: LLC, dsap STP (0x42) Individual, ssap STP (0x42) Command, ctrl 0x03: STP 802.1d, Config, Flags [none], bridge-id 8000.00:22:15:4f:98:06.8001, length 43
message-age 0.00s, max-age 20.00s, hello-time 2.00s, forwarding-delay 0.00s
root-id 8000.00:00:00:00:00:06, root-pathcost 0
11:55:05.113514 00:00:00:00:00:b6 > 00:00:c2:00:00:00, 802.3, length 60: LLC, dsap STP (0x42) Individual, ssap STP (0x42) Command, ctrl 0x03: STP 802.1d, Config, Flags [none], bridge-id 8000.90:e6:ba:f0:26:b6.8001, length 43
message-age 0.00s, max-age 20.00s, hello-time 2.00s, forwarding-delay 0.00s
root-id 8000.90:e6:ba:f0:26:b6, root-pathcost 0
11:55:05.385125 00:00:00:00:00:bc > 00:00:c2:00:00:00, 802.3, length 60: LLC, dsap STP (0x42) Individual, ssap STP (0x42) Command, ctrl 0x03: STP 802.1d, Config, Flags [none], bridge-id 8000.bc:ae:c5:c7:7a:bc.8001, length 43
message-age 0.00s, max-age 20.00s, hello-time 2.00s, forwarding-delay 0.00s
root-id 8000.bc:ae:c5:c7:7a:bc, root-pathcost 0
11:55:05.612557 00:00:00:00:00:1c > 00:00:c2:00:00:00, 802.3, length 60: LLC, dsap STP (0x42) Individual, ssap STP (0x42) Command, ctrl 0x03: STP 802.1d, Config, Flags [none], bridge-id 8000.bc:ae:c5:c7:a4:1c.8001, length 43
message-age 0.00s, max-age 20.00s, hello-time 2.00s, forwarding-delay 0.00s
root-id 8000.bc:ae:c5:c7:a4:1c, root-pathcost 0
11:55:05.728136 00:00:00:00:00:75 > 00:00:c2:00:00:00, 802.3, length 60: LLC, dsap STP (0x42) Individual, ssap STP (0x42) Command, ctrl 0x03: STP 802.1d, Config, Flags [none], bridge-id 8000.00:23:54:06:d6:75.8001, length 43
message-age 0.00s, max-age 20.00s, hello-time 2.00s, forwarding-delay 0.00s
root-id 8000.00:23:54:06:d6:75, root-pathcost 0
11:55:05.834950 00:00:00:00:00:9a > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 243: (tos 0x0, ttl 128, id 27321, offset 0, flags [none], proto UDP (17), length 229)
192.168.0.33.138 > 192.168.0.255.138: NBT UDP PACKET(138)
11:55:05.900410 00:1f:d0:2e:da:9a > 00:00:00:00:00:16, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 1, id 27322, offset 0, flags [none], proto IGMP (2), length 40, options (RA))
192.168.0.33 > 224.0.0.22: igmp v3 report, 1 group record(s) [gaddr 239.255.255.250 to_in, 0 source(s)]
11:55:05.900574 00:00:00:00:00:9a > 33:00:00:00:00:16, ethertype IPv6 (0x86dd), length 90: (hlim 1, next-header Options (0) payload length: 36) fe80::4cfd:9d4e:d4f4:ac31 > ff02::16: HBH (rtalert: 0x0000) (padn)[icmp6 sum ok] ICMP6, multicast listener report v2, length 28, 1 group record(s) [gaddr ff02::c to_in, 0 source(s)]
11:55:05.985001 00:00:00:00:00:9a > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 243: (tos 0x0, ttl 128, id 27323, offset 0, flags [none], proto UDP (17), length 229)
192.168.0.33.138 > 192.168.0.255.138: NBT UDP PACKET(138)
Что это UDP-БОТ ?
Уважаемые знатоки Ubuntu Linux подскажите, если в этом разбираетесь.
За ранее спасибо!