DC cannot ping domain computers

I am running a 2003 active directory domain. I am able to join computers to the domain and users are able to successfully log in to the domain. The domain computers CAN ping the dc but the dc CANNOT ping the user pc’s with a name or and address. I did have an old member server crash and is not off the domain but it was not running dns or dhcp. Why can the user pcs ping the dc but not the other way around. I am not running any firewalls as of yet due to testing.