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Full Discussion: How to block domains that match a keyword?
Special Forums IP Networking How to block domains that match a keyword? Post 303010099 by bakunin on Tuesday 26th of December 2017 05:38:58 PM
Old 12-26-2017
Quote:
Originally Posted by milhan
For example, if you want to block example.com you add the following lines in your /etc/hosts file:
What you need is a firewall, like the one Scrutinizer has suggested.

Notice that the way you describe you do NOT "block" any domain, you just make sure that the name associated with the domain cannot be reliably translated into an IP-address any more. This is more like painting over a certain name in the telephone book with a black marker: you cannot look up the name and its associated number any more, but everybody who knows the telephone number (or has other means to find it out) could still call it.

I hope this helps.

bakunin
 

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LEARN ABOUT SUNOS

domainname

domainname(1M)						  System Administration Commands					    domainname(1M)

NAME

       domainname - set or display name of the current domain

SYNOPSIS

       domainname [name-of-domain]

DESCRIPTION

       Without	an argument, domainname displays the name of the current domain name used in RPC exchanges, usually referred to as the NIS or NIS+
       domain name. This name typically encompasses a group of hosts or passwd entries under the same administration. The  domainname  command	is
       used  by various components of Solaris to resolve names for entries such as are found in passwd, hosts and aliases. By default, naming ser-
       vices such as NIS and NIS+ use domainname to resolve names.

       With appropriate privileges (root or an equivalent role [see rbac(5)]), you can set the name of the domain by specifying  the  name  as	an
       argument to the domainname command.

       The  domain  name for various naming services can also be set by other means. For example, ypinit can be used to specify a different domain
       for all NIS calls. The domain name of the machine is usually set during boot time through the domainname command by  the  svc:/system/iden-
       tity:domain  service.  If  the  new domain name is not saved in the /etc/defaultdomain file, the machine reverts to the old domain after it
       reboots.

FILES

       /etc/defaultdomain

       /etc/nsswitch.conf

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nis+(1), nischown(1), nispasswd(1), svcs(1), hostconfig(1M), named(1M), nisaddcred(1M), sendmail(1M),  svcadm(1M),  ypinit(1M),	sys-uncon-
       fig(1M), aliases(4), defaultdomain(4), hosts(4), nsswitch.conf(4), passwd(4), attributes(5), rbac(5), smf(5)

NOTES

       The domainname service is managed by the service management facility, smf(5), under the service identifier:

       svc:/system/identity:domain

       Administrative  actions	on  this  service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser-
       vice's status can be queried using the svcs(1) command.

SunOS 5.10							    7 Oct 2004							    domainname(1M)
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