This page provides a complete reference of all communication ports available in your Lobster Cloud environment. Each port is designated for a specific communication channel and cannot be reassigned or used for other purposes. Custom or non-standard ports are not available.
Standard ports
The following ports are the defined standard ports for your Lobster Cloud system:
Port | Protocol | Type of communication |
|---|---|---|
80 | HTTP | Used for Let's Encrypt certificate automation. All other HTTP traffic is automatically redirected to Port 443. |
443 | HTTPS | Primary communication port for HTTPS, AS2, and Lobster Data Platform login. |
587 | SMTP (Simple Mail Transfer Protocol) for incoming email receipt on the LDP. Note: Please ensure that your email server supports port 587. This applies both for receiving emails as well as for scenarios where emails are sent from the LDP via your mail server. | |
21 | FTP | File Transfer Protocol. Closed by default for security reasons. Opened on request. |
990 | FTPS | FTP over TLS/SSL for encrypted file transfer. |
22 | SSH/SFTP | Secure Shell for secure file transfer. Closed by default for security reasons. Opened on request. |
6619 | OFTP2 | ODETTE File Transfer Protocol. A secure file transfer protocol commonly used in the automotive and manufacturing industries. |
5432 | X.400 | Communication with the X.400 mailbox. |
33xx | SAP | SAP connection port, where xx corresponds to the SAP System ID. |
8020 | Transport Manager | Bidirectional communication between the internal server and the DMZ server. Also used for the Transport Manager for profile migration. Only accessible via private IP. |
9000 | Admin Console | Access to the Lobster Data Platform Admin Console. Requires IP-based authorization via Security Group. |
30000 | Passive Reverse Proxy | Available on DMZ only. Used for internal-to-external communication. |
Fixed system ports
The following ports are used by the Lobster Data Platform and cannot be changed under any circumstances:
Port | Function |
|---|---|
443 | HTTPS communication, AS2, and platform login |
9000 | Admin Console |
8020 | Transport Manager |
80 | Let's Encrypt certificate validation |
Note
Ports 443 and 9000 are open by default on new installations. Port 443 is required for HTTPS communication and platform access. Port 9000 provides access to the Admin Console. Please review your security requirements and define how you wish to restrict external access to these ports, for example via firewall rules or IP allowlisting.
Port restrictions
Restriction | Details |
|---|---|
No custom ports | Only the standard ports listed above are available. Custom or non-standard ports cannot be opened. |
Closed by default | For security reasons, ports such as FTP (21) and SSH (22) are closed by default and must be explicitly requested via support ticket. |
IP-based authorization only | All port openings are authorized by IP address only. DNS names cannot be used in firewall rules. |
Customer-side firewall | When requesting port openings, ensure that these ports are also open in your local firewall. |
Important
Port 25 (SMTP) is blocked due to AWS restrictions. Please use port 587 (SMTP) for incoming email receipt on the LDP.
Requesting port openings
To request a port opening, submit a support ticket to support@lobster.de with the following information:
Required information | Description |
|---|---|
Port number | The port you need opened (from the standard ports list above). |
IP addresses | The specific IP addresses that should be authorized for this port. |
Direction | Whether the rule is for incoming traffic, outgoing traffic, or both. |
Purpose | A brief description of the communication channel (for example, "SFTP for partner XYZ"). |
After submitting the ticket, the Lobster Cloud Operations team will configure the Security Group rule. You cannot modify Security Group rules directly.
Email configuration
Lobster does not provide an email server. You must provide your own SMTP server.
Required information | Description |
|---|---|
SMTP server address | The hostname or IP address of your email server. |
Port | 587 (SMTP with STARTTLS). Port 25 is not available. |
Credentials | Username and password for SMTP authentication. |
Sender address | The email address is used as the sender for system notifications. |
Recipient address | The email address used for monitoring notifications. |
Info
Your email server configuration is stored in the Lobster DATA Platform startup configuration. Ensure that your firewall allows communication between your email server and your Lobster Cloud system.