Internet and Network
Problems with DNS, connectivity, remote access, and reachability.
Category
Internet and Network
Problems with DNS, connectivity, remote access, and reachability.
Networking
Open domain Networking and Remote Access
medium severity both
Cannot Reach a Remote Host A remote host or service cannot be reached from the current machine.
First checks
- Confirm the target name, IP, and service port.
- Check whether the failure is all connectivity or only one service.
medium severity both
DNS Works by IP but Not by Name You can reach the destination by IP address, but hostname-based access fails.
First checks
- Confirm the same target works by IP.
- Run a hostname resolution check such as nslookup or dig.
high severity both
SSH or Remote Session Keeps Failing A remote login session such as SSH or another admin session will not connect or authenticate successfully.
First checks
- Confirm the remote service is expected to be enabled and listening.
- Check whether the failure is timeout, refusal, or authentication denial.