Internet Access and Isolation

Internet Access

Can the EIP bound to the ULB be re-bound to the host?

Yes. EIP supports binding to various types of cloud resources, such as ULB, cloud hosts, NAT gateways, etc.

My host only has an internal IP, how can I access this machine?

Method 1: Log in through the emergency login function in the cloud host management interface.

Method 2: Access by configuring port mapping on the machine with the Internet

Users must have two machines in the same room at the same time, and one of the machines has an external IP. Take the Centos system as an example:

Assume A Machine Internal IP:1.1.1.1 External IP:2.2.2.2 B Machine Internal IP:1.1.1.2

Use the ssh command to map the 22 port of the target B machine ip to a port of the A machine’s external ip.

Command format:

ssh -C -f -N -g -L Local Port: Target IP: Target Port username@targetip

Step: First log in to machine A and execute the ssh command:

ssh -C -f -N -g -L 5000:1.1.1.2:22 root@1.1.1.2

Then the Internet can access machine B with the following command:

ssh 2.2.2.2 -p 5000

Why can’t certain place access my server on DezaiCloud?

You can use a third-party ping tool, such as ping.chinaz.com, to detect whether the server is accessible from multiple locations. If it is not reachable, you can check whether the server’s services are running normally. If it’s inaccessible from multiple locations, there may be a backbone network failure. If only a certain place is inaccessible, it may be a problem with the local routes of that place. You can appeal to the local operator.

Can different regions, such as North China 1 and Guangzhou, achieve internal network intercommunication?

This can be achieved through DezaiCloud’s high-speed channel (UDPN). Please consult technical support or customer manager for details.

Internal Network Isolation

Is the network isolated between different users? Can others capture my data using tcpdump?

The Layer 2 and Layer 3 networks between different users are completely isolated. It’s impossible to use packet-capturing tools to obtain other users’ data.

What’s the bandwidth of the internal network server?

Currently, there is no additional limit on the internal network bandwidth. However, if there is abnormal traffic such as internal network DDoS, the system will automatically limit the speed and isolate the traffic.

Can a host in a subnet be moved to another subnet?

No, it’s not supported.

Why is the internal network latency high?

Please first check if the host has a high load (for example, whether the CPU, memory, or bandwidth is fully utilized). If the issue is not caused by the host, you can contact technical support for assistance in troubleshooting.