Era - Client/Server Architecture; Era Server (Eras); Requirements - ESET REMOTE ADMINISTRATOR Installation Manual

2. ERA – client/server architecture
Technically, ESET Remote Administrator consists of two separate components: ERA Server (ERAS) and ERA Console
(ERAC). You can run an unlimited number of ERA Servers and clients on your network as there are no limitations in
the license agreement for their use. The only limitation is the total number of clients your installation of ERA can
administer (see section 2.1.6 , "License keys").

2.1 ERA Server (ERAS)

The server component of ERA runs as a service under the following Microsoft Windows© NT-based operating
systems: NT4, 2000, XP, 2003 and Vista. The main task of this service is to collect information from clients and to
send various requests to them. These requests, including configuration tasks, remote installation requests, etc., are
created through the ERA Console (ERAC).
ERAS is a meeting point between ERAC and client computers – a place where all information is processed,
maintained or modified before being transferred to clients or to ERAC.
2.1.1

Requirements

ERAS requires a Microsoft Windows NT-based operating system (NT4, 2000, XP, 2003, Vista). The Microsoft
Windows Server Edition is not necessary for ERAS to work. A computer with ERAS should be always online and
accessible via computer network by:
• Clients (usually workstations)
• PC with ERA Console
• Other instances of ERAS (if replicated)
The chart below lists the possible network communications used when ERAS is installed. The process era.exe listens
on TCP ports 2222, 2223, 2224 and 2846. Other communications occur using native operating system processes (for
example "NetBIOS over TCP/IP").
Protocol
TCP
TCP
TCP
If using all features of the program, the following network ports need to be open:
Protocol
TCP
TCP
TCP
UDP
UDP
TCP
The minimum hardware configuration for the deployment of ERAS is also the minimum recommended
configuration for the Microsoft Windows operating system used on the machine.
Port
2222 (ERAS listening)
2223 (ERAS listening)
2221 (ERAS listening)
Port
2224 (ERAS listening)
2846 (ERAS listening)
139 (target port from the point of
view of ERAS)
137 (target port from the point of
view of ERAS)
138 (target port from the point of
view of ERAS)
445 (target port from the point of
view of ERAS)
Description
Communication between clients
and ERAS
Communication between ERAC and
ERAS
By default, this port offers
update packages using the Mirror
feature integrated in ERAS (HTTP
communication)
Description
Communication between the agent
einstaller.exe and ERAS during
remote install
ERAS replication
Copying of the agent einstaller.
exe from ERAS to a client using the
share admin$ during push install
"Name resolving" during remote
install
"Browsing" during remote install
Direct access to shared resources
using TCP/IP during remote install
(an alternative to TCP 139)
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