Agents installed on the managed machines (end-user machines) need to have access to the hostnames/IP addresses and ports listed in this article. Most of Acronis components utilize multiple IP addresses, you can find the exact IPs Acronis agents will use in your environment by running the connection verification tool.

Alternatively, you can provide access to all the hostnames/IP addresses through ports listed below, depending on the respective datacenter.

The ports need to be open for outbound connections. The ports and hostnames are checked by an integrated Connection Verification Tool during installation. Later you can check them using the tool or by issuing the telnet command. If they are accessible, you will see a blank screen after issuing the command:
telnet fes-cloud.acronis.com 44445

Ports usage
Ports 443 and 8443 are used for agent registration, data center selection, user authorization, certificate download, Web Restore, Backup and File Sync & Share management console access.
Ports 7770-7800 are used for agent communication with Management server (backup plans creation and applying, status reports, activity logging, etc.).
Local port 5905 is used by v.6.1 and older agents for agent communication with Management server.
Port 44445 is used for backup read-write operations.
You can additionally open 80 port for your convenience, so any HTTP requests from the browser will be redirected to https.

When backing up to Acronis Storage located at service provider, make sure storage can be accessed via IP address or DNS name you've assigned through port 44445.

Port 80 is also used for the remote update of agents.

Port 5060 is used for data transfer rate measurements (speedtests).

Several ports are used by Acronis agent to distribute agents updates within the local network thus with reduced utilization of Internet connections:

• Port 6888 is used by BitTorrent protocol for peer-to-peer updates over TCP and UDP. This is client connection port and also data transfer port.
• Port 6771 is a local peer discovery (LSD) port. LSD also opens up to 4 random UDP ports in 50k-65.5k range.
• Port 18018 is used for communication between peer-to-peer update components working in different modes: Updater (receives updates) and UpdaterAgent (distributes updates).
• Port 18019 is a local port, used for internal communication between different parts of Acronis Cyber Protect responsible for peer-to-peer updates.
• Port 1900 is a local port, used by UPnP and NAT-PMP services for dynamic port forwarding. These services ensure that BitTorrent traffic can reach the target agent, and that target agent can be matched with good peers for fast transfers. UPnP + NAT-PMP also opens up to 3 random UDP ports in 50k-65.5k range.
• BitTorrent uses a "distributed sloppy hash table" (DHT) for storing peer contact information for "trackerless" torrents. In effect, each peer becomes a tracker. The protocol is based on Kademila and is implemented over UDP. DHT + peer announcing mechanism opens up to 4 random UDP ports in 50k-65.5k range.