topic tcpdump: no suitable device found in Operating System - HP-UX

tcpdump: no suitable device found

mondal — Tue, 14 Sep 2010 10:57:30 GMT

Hi All,

I am trying to run tcpdump command as root ,it is working fine . I want to give 'oracle' user
to run the command . I changed the permission of tcpdump command as -rwxr-xr-x . When I am running the command I am getting the below error.

nuh501:/home/root # /usr/local/sbin/tcpdump host nuh501
tcpdump: no suitable device found

Re: tcpdump: no suitable device found

Jim Walls — Wed, 15 Sep 2010 03:20:18 GMT

You can only run tcpdump as root because other users do not have permission to access the underlying network devices.

It is also good from a security perspective since it limits access to people with the proper authority to snoop network connections.

Re: tcpdump: no suitable device found

Kapil Jha — Wed, 15 Sep 2010 03:46:53 GMT

Reading packets from a network interface may require that you have special privileges:

You must be root or tcpdump must be installed setuid to root.

From Man page....

BR,
Kapil+

Re: tcpdump: no suitable device found

mondal — Sun, 19 Sep 2010 12:05:43 GMT

Hi All ,

Thanks for the information . If I am providing the user details and command alias
in /etc/sudoers file it will work?

Re: tcpdump: no suitable device found

SoorajCleris — Sun, 19 Sep 2010 12:44:02 GMT

It is not that the permission of the command .. but the data which it access.. still , may be need to check . Never run as non root.

Regards,
Sooraj

Re: tcpdump: no suitable device found

Jim Walls — Mon, 20 Sep 2010 02:36:24 GMT

Yes, you should be able to run it from a non-privileged login using sudo.