Use the acl
command to restrict users' access to NetMRI to a list of IP addresses or subnets, thereby reducing the likelihood of unauthorized access. By default, the appliance accepts user connections via HTTP (port 80), HTTPS (port 443), SSH (port 22), and SYSLOG (port 514). If an access control list is defined, any or all of these ports can be restricted to a specific list of IP addresses.
Syntax
The following subcommands are supported by the acl
command:
list
lists all ACL entries.flush
clears all ACL entries (no access restrictions).accept
accepts connections from a given CIDR block.reject
rejects connections from a given CIDR block.commit
saves the ACL and makes it active.
The accept
, delete
, and reject
commands accept the following arguments:
accept <CIDR> 22|69|80|443|514|ssh|tftp|http|https|syslog|all
reject <CIDR> 22|69|80|443|514|ssh|tftp|http|https|syslog|all
delete <CIDR> 22|69|80|443|514|ssh|tftp|http|https|syslog
where <CIDR>
is formatted as A.B.C.D/NN or <IPv6 Address>/<Prefix>.
For example, the following commands:
flush
accept 192.168.12.0/24
all commit
would allow connections from any host in the specified subnet to any of the access ports supported by NetMRI. If you'd like to exclude specific hosts from a range of addresses, you should use one or more reject
commands before the accept
command as in the following example:
flushreject 192.168.12.66/32 all
reject 192.168.12.99/32 all
accept 192.168.12.0/24 all commit
If at least one ACL entry is defined, all access attempts other than those specifically listed are rejected; if no ACL entries are defined, all access attempts are accepted.
Typing acl
? at the prompt provides a brief list of all options:
rgrace64-212.inca.infoblox.com> acl ?
ACL Commands
------------
?- display this list
commit - save working ACLs and make active
exit - exit ACL mode
flush - clear all working ACL entries
list - list all working ACL entries
reload - clear working entries and reload from disk
The following commands add or remove entries to the ACL to either allow or reject access from given CIDRs. The order of ACL entries is important, with the first matching
rule from top to bottom used to determine if a given host can access the system.
accept <CIDR> 22|69|80|443|514|ssh|tftp|http|https|syslog|all
reject <CIDR> 22|69|80|443|514|ssh|tftp|http|https|syslog|all
delete <CIDR> 22|69|80|443|514|ssh|tftp|http|https|syslog
where <CIDR> is formatted as A.B.C.D/NN or <IPv6 Address>/<Prefix>
Use "0.0.0.0/0" CIDR to refer to all IPv4 sources, or "::/0" CIDR for all IPv6 sources. The ACL list must be committed to take effect.