Dedicated server networks
Dedicated servers are connected to Selectel's network infrastructure by default and can be connected to:
- public network (internet),
- private network (local area network).
Some servers Chipcore Line only connect to the public network, you cannot connect them to the local network.
Separate network interfaces are used to connect the server to the public and private network (group of aggregated network interfaces):
- Internet port,
- port for the local network.
You can view server port information in control panel on the server page → tab Ports.
After ordering, the server is included in a shared VLAN for the public network and a dedicated VLAN for the private network. One VLAN for the private network in one pool is allocated per account. The list of all VLANs can be viewed in the control panel in the section Servers and hardware → Network → tab VLAN.
You may need to configure network interfaces on the server.
If the dedicated server is not available over the network, you can connect to it via the KVM console. An additional service can be ordered for Chipcore Line servers IP-KVM connection for 3 hours or boot in recovery and diagnostic mode.
A server of arbitrary configuration can be disconnected from the public network. To do this file a ticket. After disconnecting install the OS on the server by auto-installation will be impossible.
Dedicated servers by default are under Selectel DDoS protection.. For a public dedicated VLAN you can connect free of charge basic firewall.
Public network
Public networks are used for servers to access the Internet using public IP addresses.
The server is automatically included in the shared VLAN for the public network and is allocated a single IPv4 IPv4 server public address from a shared subnet. Servers of other clients are also on the shared subnet, and servers in the same account can fall into different shared subnets. For security, IP address spoofing protection is used in the shared subnet.
To obtain additional IP addresses order a dedicated subnet and configure it. When ordering a dedicated subnet, IP addresses will be allocated to an account by a separate VLAN. No more than one dedicated VLAN for the public network in one pool is allocated per account.
Dedicated subnet IP addresses can be used on account servers that are in the same pool (IP addresses work only within the same pool). When ordering a dedicated subnet, you can use either an address from a shared subnet or a dedicated subnet. You cannot use both IP addresses at the same time.
To view the VLAN that is assigned to a port, go to control panel on the server page → tab Ports.
The network interface on the server will be configured automatically only when the OS is installed automatically. When installing the OS from your own image, you must manually configure the network interface on the server.
Network parameters (IP address, subnet mask, default gateway) can be viewed on the subnet page in the control panel. To do this, go to Servers and hardware → Network tab Subnetwork and click on the desired subnet.
When setting up the network, we recommend using Selectel recursive DNS servers But you can specify any public DNS servers.
All traffic (incoming, outgoing) that passes through the Internet port is summarized and charged according to the traffic consumption patterns.
On the ports are installed network limits:
- for the number of MAC addresses — 25 MAC addresses per switch port;
- for broadcast traffic — 10 MB/sec per port for each separate type of traffic.
Private network
Private (local) networks do not have access to the Internet and are used to connect servers to each other inside the data center.
Traffic in the local network is not charged.
In a single pool, all servers (except for some Chipcore Line servers) are connected to a simple L2-local network via Selectel switches. After ordering, the server will be automatically included in the VLAN for the local network. One VLAN for LAN in one pool is allocated per account. If more VLANs are needed, you can set up a Q-in-Q.
To see which VLAN is assigned to a port, go to control panel on the server page → tab Ports.
To create network connectivity between dedicated servers that are located in the same pool, an L2 private network is used. To configure it, specify the same VLAN on the local port of each server and configure the servers for the same addressing.
To create network connectivity between dedicated servers in different pools and/or with other Selectel products use a Selectel Global Router.
To use a local area network configure local addressing on network interfaces in the server OS.
Network to third-party operator
Many telecom operators have a point of presence in Selectel data centers. You can organize a direct connection with them using the Direct Connect service:
- Direct Connect — physical port — rent of a port on the Selectel access switch. In this case, the client shall organize the connection by the service provider (clarification of the possibility of connection to Selectel, checking of crossing, payment for communication channels, etc.) on his/her own;
- Direct Connect — logical port — rental of a pre-raised, reserved connection between Selectel and a partner backbone operator.
Blocked ports
To secure the Selectel infrastructure from malicious network activity, some TCP/UDP ports are blocked including 25 (mailings).
If the port does not fall under these restrictions, check its availability on the OS side using the utility Nmap.