Otwarte porty UDP w komputerze


(Cjp38142) #1

Ostatnio postanowiłem sprawdzić otwarte porty na moim komputerze i ku mojemu zdziwieniu okazało się, że otwartych jest ich 752 (tylko porty UDP). Zmartwiła mnie trochę ta sytuacja (w końcu otwarte porty to potencjalne źródło zagrożenia), więc chciałbym Was spytać: Czy taka ilość otwartych portów powinna niepokoić? Poniżej wklejam listę otwartych portów:

137	NETBIOS Name Service

189	Queued File Transport

231	[Unknown]

233	[Unknown]

299	[Unknown]

408	Prospero Resource Manager Sys. Man.

639	MSDP

702	[Unknown]

801	device

829	PKIX-3 CA/RA

879	[Unknown]

1219	AeroFlight-Ret

1294	[Unknown]

1503	Databeam

1679	darcorp-lm

1689	firefox

1698	RSVP-ENCAPSULATION-1

2022	xinuexpansion2

2051	[Unknown]

2171	[Unknown]

2185	[Unknown]

2834	EVTP

2838	Starbot

2899	POWERGEMPLUS

2992	ITB301

3469	Pluribus

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4500	sae-urn

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7183	[Unknown]

7396	[Unknown]

7428	OpenView DM Log Agent Manager

7535	[Unknown]

7796	[Unknown]

8002	Teradata ORDBMS

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I jeszcze jedno pytanie: Czy znacie jakąś stronę, gdzie można sprawdzić za co dany port odpowiada (lub w jaki sposób może zostać wykorzystany przeciwko nam) ? Bo często google nie podaje sensownej odpowiedzi dla portu, a wtedy trzeba szukać "port XXXX hacking" i sprawdzać, czy są na niego jakieś metody...


(jimasek) #2

Nie są to otwarte porty tylko porty które wykorzystuje system i aplikacje na nim zainstalowane, które na tych portach nasłuchują i są gotowe do użycia. Ważną sprawą jest aktualizowanie systemu oraz dobry program antywirusowy. Poza tym następną barierą w sieci jest router, który chyba masz gdzieś w sieci?


(system) #3

Wiesz, moim zdaniem protokół UDP nie niesie ze sobą takiego zagrożenia, jak TCP. Gdyż jeżeli chciałbym, żeby cokolwiek wypłynęło z Twojego komputera wolałbym mieć 100 % pewność, że to do mnie dotrze, co do końca nie daje UDP ;]

Możesz również spróbować po analizować pakiety I/O w wireshark'u

Pozdrawiam


(Cjp38142) #4

System zawsze na bieżąco aktualizowany, antywirus to AVG, router też gdzieś się po drodze zapodział :wink:

Btw. Gdy w cmd wpiszę "netstat -a" to wyskakuje trochę portów TCP nastawionych na nasłuchiwanie, ale program do skanowania otwartych portów ich nie wykrył, więc chyba nie niosą ze sobą jakiegoś zagrożenia?


(system) #5

Wydaje się mi, że taką dość dobrą orientacyjnie informacją jest zapora systemu windows, która posiada reguły przychodzące oraz wychodzące.


(roobal) #6

Jeśli skaner nie wykrywa otwartych portów, to tak powinno być. Skanowałeś z własnego komputera, czy z innego w sieci?

Pozdrawiam!


(Cjp38142) #7

Skanowałem z własnego komputera, ale po IP w sieci LAN (nie wiem, czy w takim wypadku router bierze udział w połączeniu).


(roobal) #8

I tak, i nie. Router nie wybiera trasy dla pakietów, a przynajmniej nie powinien, jeśli są w jednej podsieci, jeden komputer wysyła pakiet prosto do innego komputera przez switch, który akurat jest wbudowany w router.

Pozdrawiam!