HP Officejet Pro X551 Printer series - Manual (Page 145)

secured. This is accomplished by setting the HP Embedded Web Server administrator password. Once
the HP Embedded Web Server administrator password is set, the admin password must be entered
when accessing the control panel lock enable/disable setting.
Disable unused protocols and services
The HP Embedded Web Server allows the ability to disable unused protocols and services. These
protocol and services settings can also be protected from being changed by setting the EWS admin
password. These protocols and services include the following:
● IPv4 and IPv6 disable/enable: To operate properly on a TCP/IP network, the product must
be configured with valid TCP/IP network configuration settings, such as an IP address that is valid
for your network. This product supports two versions of this protocol: version 4 (IPv4) and version
6 (IPv6). IPv4 and IPv6 can be enabled/disable individually or simultaneously enabled.
● Bonjour disable/enable: Bonjour services are typically used on small networks for IP address
and name resolution where conventional a DNS server is not used. The Bonjour service can be
enabled or disabled.
● SNMP disable/enable: SNMP (Simple Network Management Protocol) is used by network
management applications for product management. This product supports the SNMPv1 protocol
on IP networks. This product allows the ability to enable/disable SNMPv1.
● WINS disable/enable: If you have a Dynamic Host Configuration Protocol (DHCP) service on
your network, the product automatically obtains its IP address from that server and registers its
name with any RFC 1001 and 1002-compliant dynamic name services as long as the Windows
Internet Name Service (WINS) server IP address has been specified. The WINS server IP address
configuration can be enable or disabled. If enabled, then the primary and secondary WINS
server can be specified.
● SLP disable/enable: Service Location Protocol (SLP) is an Internet standard network protocol
that provides a framework to allow network applications to discover the existence, location and
configuration of networked services in enterprise networks. This protocol can be enabled or
disabled.
● LPD disable/enable: Line Printer Daemon (LPD) refers to the protocol and programs associated
with line-printer spooling services that may be installed on various TCP/IP systems. LPD can be
enabled or disabled.
● LLMNR disable/enable: Link-Local Multicast Name Resolution (LLMNR) is a protocol based on
the Domain Name System (DNS) packet format that allows both IPv4 and IPv6 hosts to perform
name resolution for hosts on the same local link. LLMNR can be enabled or disabled.
● Port 9100 disable/enable: The product supports raw IP printing through TCP Port 9100. This
HP-propriety TCP/IP port on the product is the default port for printing and it is accessed by HP
software. Port 9100 can be enabled or disabled.
● Web Services disable/enable: The product supports the ability to enable or disable Microsoft
Web Services Dynamic Discovery (WS Discovery) protocols or Microsoft Web Services for
ENWW Product security features 131