nc not working with list of ports rather than range
In the PORT SCANNING section of nc's man page it says:
You can also specify a list of ports to scan, for example:
$ nc -zv host.example.com 80 20 22
nc: connect to host.example.com 80 (tcp) failed: Connection refused
nc: connect to host.example.com 20 (tcp) failed: Connection refused
Connection to host.example.com port [tcp/ssh] succeeded!
However, typing this same command in (substituting my own working server which I know is listening on port 22) gives the following:
$ nc -zv my.server.here 80 20 22
nc: connect to my.server.here port 80 (tcp) failed: Connection refused
Unlike in the man page example, it stops there without scanning the other two ports specified. Is this port listing feature not supported anymore? Can anyone confirm that it does still work for them?
networking port netcat
asked Feb 14 at 19:05
DopevoponopDopevoponop
11
add a comment |
In the PORT SCANNING section of nc's man page it says:
You can also specify a list of ports to scan, for example:
$ nc -zv host.example.com 80 20 22
nc: connect to host.example.com 80 (tcp) failed: Connection refused
nc: connect to host.example.com 20 (tcp) failed: Connection refused
Connection to host.example.com port [tcp/ssh] succeeded!
However, typing this same command in (substituting my own working server which I know is listening on port 22) gives the following:
$ nc -zv my.server.here 80 20 22
nc: connect to my.server.here port 80 (tcp) failed: Connection refused
Unlike in the man page example, it stops there without scanning the other two ports specified. Is this port listing feature not supported anymore? Can anyone confirm that it does still work for them?
networking port netcat
asked Feb 14 at 19:05
DopevoponopDopevoponop
11
Neither of the two pages I've found -- man.openbsd.org/nc.1 and linux.die.net/man/1/nc -- mention listing ports that way. They both have examples of single ports or of ranges.
– Doug Deden
Feb 14 at 21:01
add a comment |
In the PORT SCANNING section of nc's man page it says:
You can also specify a list of ports to scan, for example:
$ nc -zv host.example.com 80 20 22
nc: connect to host.example.com 80 (tcp) failed: Connection refused
nc: connect to host.example.com 20 (tcp) failed: Connection refused
Connection to host.example.com port [tcp/ssh] succeeded!
However, typing this same command in (substituting my own working server which I know is listening on port 22) gives the following:
$ nc -zv my.server.here 80 20 22
nc: connect to my.server.here port 80 (tcp) failed: Connection refused
Unlike in the man page example, it stops there without scanning the other two ports specified. Is this port listing feature not supported anymore? Can anyone confirm that it does still work for them?
networking port netcat
asked Feb 14 at 19:05
DopevoponopDopevoponop
11
In the PORT SCANNING section of nc's man page it says:
You can also specify a list of ports to scan, for example:
$ nc -zv host.example.com 80 20 22
nc: connect to host.example.com 80 (tcp) failed: Connection refused
nc: connect to host.example.com 20 (tcp) failed: Connection refused
Connection to host.example.com port [tcp/ssh] succeeded!
However, typing this same command in (substituting my own working server which I know is listening on port 22) gives the following:
$ nc -zv my.server.here 80 20 22
nc: connect to my.server.here port 80 (tcp) failed: Connection refused
Unlike in the man page example, it stops there without scanning the other two ports specified. Is this port listing feature not supported anymore? Can anyone confirm that it does still work for them?
networking port netcat
networking port netcat
asked Feb 14 at 19:05
DopevoponopDopevoponop
11
asked Feb 14 at 19:05
DopevoponopDopevoponop
11
asked Feb 14 at 19:05
DopevoponopDopevoponop
11
asked Feb 14 at 19:05
DopevoponopDopevoponop
11
asked Feb 14 at 19:05
DopevoponopDopevoponop
11
11
Neither of the two pages I've found -- man.openbsd.org/nc.1 and linux.die.net/man/1/nc -- mention listing ports that way. They both have examples of single ports or of ranges.
– Doug Deden
Feb 14 at 21:01
add a comment |
Neither of the two pages I've found -- man.openbsd.org/nc.1 and linux.die.net/man/1/nc -- mention listing ports that way. They both have examples of single ports or of ranges.
– Doug Deden
Feb 14 at 21:01
Neither of the two pages I've found -- man.openbsd.org/nc.1 and linux.die.net/man/1/nc -- mention listing ports that way. They both have examples of single ports or of ranges.
– Doug Deden
Feb 14 at 21:01
Neither of the two pages I've found -- man.openbsd.org/nc.1 and linux.die.net/man/1/nc -- mention listing ports that way. They both have examples of single ports or of ranges.
– Doug Deden
Feb 14 at 21:01
add a comment |
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Neither of the two pages I've found -- man.openbsd.org/nc.1 and linux.die.net/man/1/nc -- mention listing ports that way. They both have examples of single ports or of ranges.
– Doug Deden
Feb 14 at 21:01