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UNIX for Beginners Questions & Answers
Changing a MAC
Post 303010306 by rbatte1 on Friday 29th of December 2017 12:01:38 PM
12-29-2017
Moderator
Well firstly I would caution you to ensure that they are kept very separate. A common switch or VLAN could panic if it seems to see the same MAC on two ports.
It's been a while since I have done this sort of thing (Solaris 2.6!) where we labelled the NIC with a MAC based on the sub-area-node definition for a VTAM connection to an IBM mainframe. I think we actually set the Token Ring NIC with that and the Ethernet NIC with something else. I think the licence was based on it, so you might need to be careful for that too. I regret that I don't have any Solaris left
The 'It cannot be done!' is a lie, for some architectures at least. Some lesser Operating Systems can't cope though. I think you have it about right though.
Robin
It's been a while since I have done this sort of thing (Solaris 2.6!) where we labelled the NIC with a MAC based on the sub-area-node definition for a VTAM connection to an IBM mainframe. I think we actually set the Token Ring NIC with that and the Ethernet NIC with something else. I think the licence was based on it, so you might need to be careful for that too. I regret that I don't have any Solaris left
The 'It cannot be done!' is a lie, for some architectures at least. Some lesser Operating Systems can't cope though. I think you have it about right though.
Robin
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LEARN ABOUT FREEBSD
mac_is_present
MAC_IS_PRESENT(3) BSD Library Functions Manual MAC_IS_PRESENT(3) NAME
mac_is_present -- report whether the running system has MAC support LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <sys/mac.h> int mac_is_present(const char *policyname); DESCRIPTION
The mac_is_present() function determines whether the currently-running kernel supports MAC for a given policy or not. If policyname is non-NULL, the presence of the named policy (e.g. ``biba'', ``mls'', ``te'') is checked, otherwise the presence of any MAC policies at all is checked. RETURN VALUES
If the system supports the given MAC policy, the value 1 is returned. If the specified MAC policy is not supported, the value 0 is returned. If an error occurs, the value -1 is returned. ERRORS
[EINVAL] The value of policyname is not valid. [ENOMEM] Insufficient memory was available to allocate internal storage. SEE ALSO
mac(3), mac_free(3), mac_get(3), mac_prepare(3), mac_set(3), mac_text(3), mac(4), mac(9) HISTORY
Support for Mandatory Access Control was introduced in FreeBSD 5.0 as part of the TrustedBSD Project. BSD
July 7, 2006 BSD