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+---- Thread: 2 ports are filtered (/showthread.php?tid=6058417)
2 ports are filtered - nicodemo - Mar 19, 2020
I made a port scanner and these 2 ports are filtered.
https://imgur.com/FD3wad0
the target is probably the gateway address of my isp.
What are those two ports. Are they closed or open?
RE: 2 ports are filtered - Shisho - Mar 19, 2020
If they are filtered they can be either closed or open but there’s no way to know because your packet is dropped somewhere.
If a port is opened your assumed SYN scan receives a SYN-ACK in response. If a port is closed your assumed SYN receives an RST in response. If a port is filtered your assumed SYN receives nothing in response and can assume that if any other port resulted in open or closed that port can have access filtered.
RE: 2 ports are filtered - nicodemo - Mar 20, 2020
(Mar 19, 2020 11:43 PM)Shisho Wrote: If they are filtered they can be either closed or open but there’s no way to know because your packet is dropped somewhere.
If a port is opened your assumed SYN scan receives a SYN-ACK in response. If a port is closed your assumed SYN receives an RST in response. If a port is filtered your assumed SYN receives nothing in response and can assume that if any other port resulted in open or closed that port can have access filtered.
I really thank for this information which is very precious to me.
What does it mean that it can have filtered access?
RE: 2 ports are filtered - Shisho - Mar 20, 2020
(Mar 20, 2020 12:19 AM)nicodemo Wrote: I really thank for this information which is very precious to me.
What does it mean that it can have filtered access?
Perhaps some firewall or logical division of the network is in the way that restricts access to this for some reason.