Centos – Is it possible to install Samba 3 on CentOS 7

I'm writing this from the samba server's perspective.

If you don't have access to a gui or prefer to do things in the command line you can replace step 5 with:

First, work out which ports samba is listening on. This can be done with this command:

netstat -tulpn | egrep "samba|smbd|nmbd|winbind"

You'll see something like this:

tcp 0 0 127.0.0.1:139 0.0.0.0:* LISTEN 43270/smbd
tcp 0 0 10.0.0.1:139 0.0.0.0:* LISTEN 43270/smbd
tcp 0 0 10.0.0.1:88 0.0.0.0:* LISTEN 43273/samba
tcp 0 0 127.0.0.1:88 0.0.0.0:* LISTEN 43273/samba
tcp 0 0 127.0.0.1:445 0.0.0.0:* LISTEN 43270/smbd
tcp 0 0 10.0.0.1:445 0.0.0.0:* LISTEN 43270/smbd

The above example shows, that the services are listening on localhost (127.0.0.1) and the interface with IP 10.0.0.1 - each on the listed ports (139, 88, 445, and so on). Further information about samba port usage can be found here: https://wiki.samba.org/index.php/Samba_port_usage

Make a note of port and associated tcp/udp, then add lines that open these ports and protocols in /etc/sysconfig/iptables (it's probably a good plan to back up iptables before editing).

If we take the top line of output from the example above, we'd want to open TCP port 139 in iptables. This can be done by adding the following line of text to /etc/sysconfig/iptables:

-A INPUT -m state --state NEW -m tcp -p tcp --dport 139 -j ACCEPT

Say if you wanted to open UDP port 137 you could do it by adding the following line of text to /etc/sysconfig/iptables

-A INPUT -m state --state NEW -m udp -p ucp --dport 137 -j ACCEPT

You'd need to keep adding lines for any other ports that you need to have open.

Then save your changes, and restart IPtables (service iptables restart).

Hope that helps.

The actual dependency to install (for Red Hat Enterprise Linux 7 / CentOS 7 / Scientific Linux 7) is lmdb-devel.

Rather than following some random tutorial for a now EOL version of Samba, you might be better off following the official (and up to date) Samba guidance: Build Samba from Source, Package Dependencies Required to Build Samba, Setting up Samba as an Active Directory Domain Controller

To be sure, the tutorial to which you linked DOES NOT list the current Samba dependencies for CentOS 7.