How to change port from filtered to open
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I had done the port forwarding on port 4444 and im using gufw as firewall but when i'm using nmap the port shows as filtered not open.
PORT STATE SERVICE
4444/tcp filtered krb524
If i remove the firewall the port gets closed even the port forward is still there.
PORT STATE SERVICE
4444/tcp closed krb524
How can i open the port ( with or without the firewall doesn't matter) ? I do have a dynamic ip but im using a dns to get the ip and the port forward is on dns.
Thanks.
networking server dns firewall nmap
asked Nov 22 '16 at 17:33
clint rockclint rock
912
add a comment |
I had done the port forwarding on port 4444 and im using gufw as firewall but when i'm using nmap the port shows as filtered not open.
PORT STATE SERVICE
4444/tcp filtered krb524
If i remove the firewall the port gets closed even the port forward is still there.
PORT STATE SERVICE
4444/tcp closed krb524
How can i open the port ( with or without the firewall doesn't matter) ? I do have a dynamic ip but im using a dns to get the ip and the port forward is on dns.
Thanks.
networking server dns firewall nmap
asked Nov 22 '16 at 17:33
clint rockclint rock
912
add a comment |
I had done the port forwarding on port 4444 and im using gufw as firewall but when i'm using nmap the port shows as filtered not open.
PORT STATE SERVICE
4444/tcp filtered krb524
If i remove the firewall the port gets closed even the port forward is still there.
PORT STATE SERVICE
4444/tcp closed krb524
How can i open the port ( with or without the firewall doesn't matter) ? I do have a dynamic ip but im using a dns to get the ip and the port forward is on dns.
Thanks.
networking server dns firewall nmap
asked Nov 22 '16 at 17:33
clint rockclint rock
912
I had done the port forwarding on port 4444 and im using gufw as firewall but when i'm using nmap the port shows as filtered not open.
PORT STATE SERVICE
4444/tcp filtered krb524
If i remove the firewall the port gets closed even the port forward is still there.
PORT STATE SERVICE
4444/tcp closed krb524
How can i open the port ( with or without the firewall doesn't matter) ? I do have a dynamic ip but im using a dns to get the ip and the port forward is on dns.
Thanks.
networking server dns firewall nmap
networking server dns firewall nmap
asked Nov 22 '16 at 17:33
clint rockclint rock
912
asked Nov 22 '16 at 17:33
clint rockclint rock
912
asked Nov 22 '16 at 17:33
clint rockclint rock
912
asked Nov 22 '16 at 17:33
clint rockclint rock
912
asked Nov 22 '16 at 17:33
clint rockclint rock
912
912
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
A port being "open" means there is a service listening on that port. If it is "closed" then the OS and firewall are not preventing communication on that port, but there is no service which is listening. You have to start a process on your machine that will listen on that port.
answered Nov 22 '16 at 19:28
bonsaivikingbonsaiviking
39115
That means i have to start the krb524 service right ? or it means that i can start any proces on that port and it will open automatic ?
– clint rock
Nov 23 '16 at 9:30
@clintrock yes, any service which chooses to listen on that port. Trivial example using netcat:nc -l 4444
– bonsaiviking
Nov 23 '16 at 15:25
add a comment |
from the command line, you want to do this:
sudo ufw allow 4444
sudo ufw allow out 4444
Not really sure how to do it with the gui, but if you can run nmap, you can run the above.
Nmap should then report the port as open - at least from that machine.
If it doesn't work after that, there's likely something else in between
answered Apr 5 at 14:32
rm-vandarm-vanda
2,37321523
add a comment |
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2 Answers
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active
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2 Answers
2
active
oldest
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votes
A port being "open" means there is a service listening on that port. If it is "closed" then the OS and firewall are not preventing communication on that port, but there is no service which is listening. You have to start a process on your machine that will listen on that port.
answered Nov 22 '16 at 19:28
bonsaivikingbonsaiviking
39115
That means i have to start the krb524 service right ? or it means that i can start any proces on that port and it will open automatic ?
– clint rock
Nov 23 '16 at 9:30
@clintrock yes, any service which chooses to listen on that port. Trivial example using netcat:nc -l 4444
– bonsaiviking
Nov 23 '16 at 15:25
add a comment |
A port being "open" means there is a service listening on that port. If it is "closed" then the OS and firewall are not preventing communication on that port, but there is no service which is listening. You have to start a process on your machine that will listen on that port.
answered Nov 22 '16 at 19:28
bonsaivikingbonsaiviking
39115
That means i have to start the krb524 service right ? or it means that i can start any proces on that port and it will open automatic ?
– clint rock
Nov 23 '16 at 9:30
@clintrock yes, any service which chooses to listen on that port. Trivial example using netcat:nc -l 4444
– bonsaiviking
Nov 23 '16 at 15:25
add a comment |
A port being "open" means there is a service listening on that port. If it is "closed" then the OS and firewall are not preventing communication on that port, but there is no service which is listening. You have to start a process on your machine that will listen on that port.
answered Nov 22 '16 at 19:28
bonsaivikingbonsaiviking
39115
A port being "open" means there is a service listening on that port. If it is "closed" then the OS and firewall are not preventing communication on that port, but there is no service which is listening. You have to start a process on your machine that will listen on that port.
answered Nov 22 '16 at 19:28
bonsaivikingbonsaiviking
39115
answered Nov 22 '16 at 19:28
bonsaivikingbonsaiviking
39115
answered Nov 22 '16 at 19:28
bonsaivikingbonsaiviking
39115
answered Nov 22 '16 at 19:28
bonsaivikingbonsaiviking
39115
39115
That means i have to start the krb524 service right ? or it means that i can start any proces on that port and it will open automatic ?
– clint rock
Nov 23 '16 at 9:30
@clintrock yes, any service which chooses to listen on that port. Trivial example using netcat:nc -l 4444
– bonsaiviking
Nov 23 '16 at 15:25
add a comment |
That means i have to start the krb524 service right ? or it means that i can start any proces on that port and it will open automatic ?
– clint rock
Nov 23 '16 at 9:30
@clintrock yes, any service which chooses to listen on that port. Trivial example using netcat:nc -l 4444
– bonsaiviking
Nov 23 '16 at 15:25
That means i have to start the krb524 service right ? or it means that i can start any proces on that port and it will open automatic ?
– clint rock
Nov 23 '16 at 9:30
That means i have to start the krb524 service right ? or it means that i can start any proces on that port and it will open automatic ?
– clint rock
Nov 23 '16 at 9:30
@clintrock yes, any service which chooses to listen on that port. Trivial example using netcat:
nc -l 4444– bonsaiviking
Nov 23 '16 at 15:25
@clintrock yes, any service which chooses to listen on that port. Trivial example using netcat:
nc -l 4444– bonsaiviking
Nov 23 '16 at 15:25
add a comment |
from the command line, you want to do this:
sudo ufw allow 4444
sudo ufw allow out 4444
Not really sure how to do it with the gui, but if you can run nmap, you can run the above.
Nmap should then report the port as open - at least from that machine.
If it doesn't work after that, there's likely something else in between
answered Apr 5 at 14:32
rm-vandarm-vanda
2,37321523
add a comment |
from the command line, you want to do this:
sudo ufw allow 4444
sudo ufw allow out 4444
Not really sure how to do it with the gui, but if you can run nmap, you can run the above.
Nmap should then report the port as open - at least from that machine.
If it doesn't work after that, there's likely something else in between
answered Apr 5 at 14:32
rm-vandarm-vanda
2,37321523
add a comment |
from the command line, you want to do this:
sudo ufw allow 4444
sudo ufw allow out 4444
Not really sure how to do it with the gui, but if you can run nmap, you can run the above.
Nmap should then report the port as open - at least from that machine.
If it doesn't work after that, there's likely something else in between
answered Apr 5 at 14:32
rm-vandarm-vanda
2,37321523
from the command line, you want to do this:
sudo ufw allow 4444
sudo ufw allow out 4444
Not really sure how to do it with the gui, but if you can run nmap, you can run the above.
Nmap should then report the port as open - at least from that machine.
If it doesn't work after that, there's likely something else in between
answered Apr 5 at 14:32
rm-vandarm-vanda
2,37321523
answered Apr 5 at 14:32
rm-vandarm-vanda
2,37321523
answered Apr 5 at 14:32
rm-vandarm-vanda
2,37321523
answered Apr 5 at 14:32
rm-vandarm-vanda
2,37321523
2,37321523
add a comment |
add a comment |
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