Understanding ports and protocols
MVE uses different ports and protocols for several types of network communication, as shown in the following diagram:
- The ports must be open or active for MVE to function properly. Make sure that all the printer ports are enabled.
- Some communications require an ephemeral port, which is an allocated range of available ports on the server. When a client requests a temporary communication session, the server assigns a dynamic port to the client. The port is valid only for a short duration and can become available for reuse when the previous session expires.
Server‑to‑printer communication
Protocol | MVE server | Printer | Used for |
|---|---|---|---|
Network Printing Alliance Protocol (NPAP) | UDP 9187 | UDP 9300 | Communicating with Lexmark network printers |
XML Network Transport (XMLNT) | UDP 9187 | UDP 6000 | Communicating with some Lexmark network printers |
Lexmark Secure Transport (LST) | UDP 6100 Ephemeral Transmission Control Protocol (TCP) port (handshaking) | UDP 6100 TCP 6110 (handshaking) | Communicating securely with some Lexmark network printers |
Multicast Domain Name System (mDNS) | Ephemeral User Datagram Protocol (UDP) port | UDP 5353 | Discovering Lexmark network printers and determining the security capabilities of printers This port is required to allow MVE to communicate with secured printers. |
Simple Network Management Protocol (SNMP) | Ephemeral UDP port | UDP 161 | Discovering and communicating with Lexmark and third-party network printers |
File Transfer Protocol (FTP) | Ephemeral TCP port | TCP 21 TCP 20 | Deploying files |
Hypertext Transfer Protocol (HTTP) | Ephemeral TCP port | TCP 80 | Deploying files or enforcing configurations |
TCP 443 | Deploying files or enforcing configurations | ||
Hypertext Transfer Protocol over SSL (HTTPS) | Ephemeral TCP port | TCP 161 TCP 443 | Deploying files or enforcing configurations |
RAW | Ephemeral TCP port | TCP 9100 | Deploying files or enforcing configurations |
Printer‑to‑server communication
Protocol | Printer | MVE server | Used for |
|---|---|---|---|
NPAP | UDP 9300 | UDP 9187 | Generating and receiving alerts |
Server‑to‑database communication
MVE server | Database | Used for |
|---|---|---|
Ephemeral TCP port | User‑defined port. The default port is TCP 1433. | Communicating with an SQL Server database |
Ephemeral TCP port | TCP 3050 | Communicating with a Firebird database |
Client‑to‑server communication
Protocol | Browser client | MVE server |
|---|---|---|
Hypertext Transfer Protocol over SSL (HTTPs) | TCP port | TCP 443 |
Server-to-mail-server communication
Protocol | MVE server | SMTP server | Used for |
|---|---|---|---|
Simple Mail Transfer Protocol (SMTP) [Encryption = None] | Ephemeral TCP port | User‑defined port. The default port is TCP 25. | Providing email functionality for receiving alerts from printers and scheduled view export emails related to printer data |
Simple Mail Transfer Protocol (SMTP) [Encryption = SSL] | Ephemeral TCP port | User‑defined port. The default port is TCP 465. | Providing email functionality for receiving alerts from printers and scheduled view export emails related to printer data over SSL |
Simple Mail Transfer Protocol (SMTP) [Encryption = TLS/STARTTLS] | Ephemeral TCP port | User‑defined port. The default port is TCP 587. | Providing email functionality for receiving alerts from printers and scheduled view export emails related to printer data over TLS/STARTTLS |
Server-to-LDAP-server communication
Protocol | MVE server | LDAP server | Used for |
|---|---|---|---|
Lightweight Directory Access Protocol (LDAP) | Ephemeral TCP port | User‑defined port. The default port is TCP 389. | Authenticating MVE users using an LDAP server |
Lightweight Directory Access Protocol over TLS (LDAPS) | Ephemeral TCP port | User‑defined port. The default port is TCP 636. | Authenticating MVE users using an LDAP server over TLS |
Kerberos | Ephemeral UDP port | User‑defined port. The default port is UDP 88. | Authenticating MVE users using Kerberos |