Xerox 5755, 5790, 5775, 5745, 5740, 5735 manual Ports, Port 25, SMTP, Port 53, DNS, Port 68, DHCP

XEROX WorkCentre 5735/5740/5745/5755/5765/5775/5790 Information Assurance Disclosure Paper

device-initiated operations (like scanning) cannot assume the existence of the tunnel unless a print job (or other client initiated action) has been previously run since the last boot at either end of the connection.

2.8.2. Ports

The following table summarizes all potential open ports and subsequent sections discuss each port in more detail.

Default	Type	Service name
Port #
25	TCP	SMTP
53	UDP	DNS
68	UDP	BOOTP/DHCP
80	TCP	HTTP
88	UDP	Kerberos
110	TCP	POP-3 client
137	UDP	NETBIOS- Name Service
138	UDP	NETBIOS-Datagram Service; SMB filing and Scan template retrieval
139	TCP	NETBIOS; SMB filing and Scan template retrieval
161	UDP	SNMP
162	UDP	SNMP trap
389	UDP	LDAP
396	TCP	Netware
427	UDP	SLP
443	TCP	SSL
515	TCP	LPR
631	TCP	IPP
1900	UDP	SSDP
3003	TCP	http/SNMP reply
9100	TCP	raw IP

Table 9 Network Ports

Please note that there is no ftp port in this list. ftp is only used to export scanned images and to retrieve Scan Job Templates, and will open port 21 on the remote device. An ftp port is never open on the controller itself.

2.8.2.1.Port 25, SMTP

This unidirectional port is open only when Scan to E-mail or Internet Fax (I-Fax) is exporting images to an SMTP server, or when email alerts are being transmitted. SMTP messages & images are transmitted to the SMTP server from the device.

2.8.2.2.Port 53, DNS

Designating a DNS server will allow the device to resolve domain names. This can be configured via the LocalUI or WebUI.

2.8.2.3.Port 68, DHCP

This port is used only when performing DHCP, and is not open all of the time. To permanently close this port, DHCP must be explicitly disabled. This is done in User Tools via the Local User Interface or via the TCP/IP page in the Properties tab on the WebUI.

Ver. 2.00, March 2011 Page 17 of 50