Sometimes it is the simplest things that get you. I was asked to troubleshoot a system that would not register into DNS after a domain migration. The system could ping its new gateway and the new DNS servers–telnet showed access to the new DNS boxes on port 53 and name resolution was functioning correctly other
I was asked to troubleshoot a recently built DNS server that was having some difficulties. One of the errors had me scratching my head for a few minutes. When doing an nslookup the following would be displayed C:\nslookup Default Server: UnKnown Address: 192.168.1.4 As it turns out it’s not really an error –what it is describing is
Ping returns the following Pinging DC1.domain.com [::1] from ::1 with 32 bytes of data: Reply from ::1: time=1ms Reply from ::1: time=2ms Reply from ::1: time=1ms Reply from ::1: time=3ms Disable IPv6 and your problems go away. It’s usually not enough to uncheck it in the NIC properties. For best results use the registry to
Hey Firewall Admin–please open up the following ports for me. 🙂 Port Protocol Application protocol System service name n/a GRE GRE (IP protocol 47) Routing and Remote Access n/a ESP IPsec ESP (IP protocol 50) Routing and Remote Access n/a AH IPsec AH (IP protocol 51) Routing and Remote Access 7 TCP Echo Simple TCP/IP