Xerox WORKCENTRE 7755 Information Manual page 14

XEROX WorkCentre 7755/7765/7775 Information Assurance Disclosure Paper
otherwise insecure protocol. SNMP Traps may not be secure if either the client or the device has just been
rebooted. IP Filtering can be useful to prevent SNMP calls from non-IPSec clients.
Once an IPSec channel is established between two points, it stays open until one end reboots or goes into
power saver,. Only network clients and servers will have the ability to establish an IPSec tunnel with the
machine. Thus 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
Port #
25
53
68
80
88
110
137
138
139
161
162
389
396
427
443
515
631
1900
3003
9100
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 Network 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.
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 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.
2.8.2.4. Port 80, HTTP
Ver. 1.01, April 2010
Type Service name
TCP SMTP
UDP DNS
UDP BOOTP/DHCP
TCP HTTP
UDP Kerberos
TCP POP-3 client
UDP NETBIOS- Name Service
UDP NETBIOS-Datagram Service; SMB filing and Scan template retrieval
TCP NETBIOS; SMB filing and Scan template retrieval
UDP SNMP
UDP SNMP trap
UDP LDAP
TCP Netware
UDP SLP
TCP SSL
TCP LPR
TCP IPP
UDP SSDP
TCP http/SNMP reply
TCP raw IP
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