Hi I have checked and unable to find an answer to this already posted.

I have reinstalled Cent-OS 7 on a dedicated server. It uses a template that OVH have (they are the provider of the server) for re installation.

I have manually installed firewalld using yum. However when I have gone to open up ports for the required services I have found :

firewall-cmd --list-service
dhcpv6-client ssh

I assume the client is to retrieve the IPv6 range via DHCP however upon looking in ifcfg-eth0 I have the following (modified to mask the range):


SO I assume I will not receive IP's via DHCP. Of course I can understand ssh being open however do I need dhcpv6-client to be open?

1 Answer 1


That port is open by default. If you have a manually configured address, you can always close it again.

  • Thank you Michael, I did suspect that was the case but wanted to be sure.
    – Peter
    Dec 27, 2014 at 21:34

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