If you are using tcp_wrappers, which you should be, you will need to provide an entry so that your slapd server is available.
Lesson 5 / Lesson 7
Edit tcp_wrappers /etc/hosts.allow
Once you test an tcp_wrappers is working then you can add specific IP Addresses and subnets for /etc/hosts.allow so that you can increase security.
SLAPD: 127.0.0.1 188.8.131.52
You can allow an entire subnet by leaving a "dot" at the end for example this will allow all machines on a subnet:
SLAPD: 127.0.0.1 192.168.3.
Whatever you do be sure to allow the localhost which is 127.0.0.1.
What that does is deny everything except what you allow in the /etc/hosts.allow.
Firewall Set Up
Make sure you have allowed port 389 tcp on your firewall. Here is an example of the lokkit firewall which is the default.
Start the LDAP Server
# /etc/init.d/slapd start
Verify that the server started by checking port 389 which is the default port. You should see the system listening on the port 389.
You should see the port listening like so.
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:389 0.0.0.0:* LISTEN
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