---
title: "Port Requirements and General Specifications"
slug: "port-requirements-and-general-specifications-2-1-1-1"
tags: ["7.12", "Edge Filer", "Gateway", "Filer"]
updated: 2026-03-23T09:46:23Z
published: 2026-03-23T09:46:23Z
canonical: "kb.ctera.com/port-requirements-and-general-specifications-2-1-1-1"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.ctera.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Port Requirements and General Specifications

## Port Requirements

For a ports diagram, see [CTERA Edge Filer Ports Diagram](/v1/docs/ctera-edge-filer-ports-diagram).

### Inbound Ports

| Port | Protocol | Notes |
| --- | --- | --- |
| 53 | TCP & UDP | DNS resolution server. |
| 443 | TCP | HTTPS. |

### Outbound Ports

| Port | Protocol | Notes |
| --- | --- | --- |
| 25 | TCP | The default for SMTP. The port is configurable in the edge filer user interface (in the **Configuration** view, select **Alerts > Mail Server** in the navigation pane). |
| 80 | TCP | HTTP. |
| 88 | TCP & UDP | If Kerberos is used for Active Directory. |
| 123 | UDP | NTP updates. |
| 389 | UDP | If the LDAP protocol is used for Active Directory. |
| 443 | TCP | HTTPS. When Direct Mode is used, the edge filer requires the certificate to enable the TLS handshake with the object storage. See [Loading a Trusted CA Certificate to a CTERA Edge Filer](/v1/docs/loading-a-trusted-ca-certificate-to-a-ctera-edge-filer-5-1-1-1) for details. When you want to automatically send crash reports to CTERA (at URL available from CTERA Support). See [Automatically Sending Crash Reports to Support](/v1/docs/generating-a-support-report-5-1-1-1#automatically-sending-crash-reports-to-support) |
| 445 | TCP | SMB when joining to an Active Directory domain as a Computer account. |
| 636 | TCP | If LDAPS protocol is used for Active Directory. |
| 995 | TCP | CTTP. Communications with the CTERA Portal. For details about CTTP, see [What is the CTTP Transport Protocol](/v1/docs/what-is-the-ctera-cttp-transport-protocol). |
| 3268 | TCP & UDP | If LDAP GC (Global Catalog) protocol is used for Active Directory. |
| 3269 | TCP & UDP | If LDAPS GC (Global Catalog) protocol is used for Active Directory. |
| 8443 | TCP | Communications with CTERA Portal for log collection. |

## Additional Ports Not Requiring Internet Access

| Port | Protocol | Notes |
| --- | --- | --- |
| 111, 2049 | TCP | NFS |
| 135 | TCP | Lookup dynamic TCP ports. |
| 445 | TCP | SMB |
| 49152-65535 | TCP | Dynamic TCP port range that can vary at runtime. |

**Warning: CTERA Edge Filers operate behind a firewall, and it is important to leave all other ports closed.**

## Browser Requirements

The latest two releases of Google Chrome, Apple Safari, Mozilla Firefox, and Microsoft Edge.

## Software Features

| Features | Feature Description |
| --- | --- |
| Supported File Sharing Protocols | SMB 2.x/3.x (Windows File Sharing), NFS v3/v4, FTP, WebDAV |
| Monitoring | SNMP |

## Cloud Service Features

| Features | Feature Description |
| --- | --- |
| Protocol Security | TLS (Transport Level Security) |
| Efficiency | Incremental updates, data compression, block level deduplication, simultaneous synchronization |
| Versioning | Retention of previous file versions |
| Additional Services | Centralized management, centralized monitoring, Cloud Drive caching and synchronization, reporting, logging, remote access |