Dell PowerStore 7000T EMC PowerStore Planning Guide - Page 24

Appliance network ports related to file The following table outlines the collection of network ports and the corresponding services that may be found on the appliance related to file. NOTE: Outbound ports are ephemeral. Table 8. Appliance network ports related to file Port Service Protocol 20 FTP TCP 21 FTP TCP 22 SFTP TCP 53 DNS TCP/UDP 88 Kerberos TCP/UDP 111 RPC bind (for TCP/UDP SDNAS namespaces; otherwise, host service) 123 NTP UDP 135 Microsoft RPC TCP 137 Microsoft Netbios UDP; TCP/UDP WINS 138 Microsoft Netbios UDP BROWSE 139 Microsoft CIFS TCP Access Direction Outbound Inbound Inbound Outbound Outbound Bi-directional Outbound Inbound Inbound; Outbound Outbound Bi-directional Description Port used for FTP data transfers. This port can be opened by enabling FTP. Authentication is performed on port 21 and defined by the FTP protocol. Port 21 is the control port on which the FTP service listens for incoming FTP requests. Allows alert notifications through SFTP (FTP over SSH). SFTP is a client/server protocol. Users can use SFTP to perform file transfers on an appliance on the local subnet. Also provides outgoing FTP control connection. If closed, FTP will not be available. Used to transmit DNS queries to the DNS server. If closed, DNS name resolution will not work. Required for SMB v1. Required for Kerberos authentication services. Opened by the standard portmapper or rpcbind service and is an ancillary appliance network service. It cannot be stopped. By definition, if a client system has network connectivity to the port, it can query it. No authentication is performed. NTP time synchronization. If closed, time will not be synchronized among appliances. Multiple purposes for MicroSoft Client. Also used for NDMP. The NETBIOS Name Service is associated with the appliance SMB file sharing services and is a core component of that feature (Wins). If disabled, this port disables all SMB related services. The NETBIOS Datagram Service is associated with the appliance SMB file sharing services and is a core component of that feature. Only Browse service is used. If disabled, this port disables Browsing capability. The NETBIOS Session Service is associated with appliance SMB file sharing services and is a core component of that functionality. If SMB services are 24 Port Usage