EDS Device Servers User Guide
158
C: Networking and Security
This chapter describes the following networking and security concepts as they relate to
the EDS:
SSH
⎯
described below.
SSL
⎯
see page 159
Serial tunneling
⎯
see page
161
This chapter concludes with a description of modem emulation (page
164)
.
SSH
Like SSL, Secure Shell (SSH) is a protocol that provides secure encrypted
communications over unsecured TCP/IP networks such as the Internet. SSH allows for
secure access to remote systems, eliminating potential security breaches such as
spoofing and eavesdropping or hijacking of sessions. However, SSH differs significantly
from SSL and, in fact, cannot communicate with SSL. The two are different protocols,
though they have some overlap in how they accomplish similar goals.
How Does SSH Authenticate?
SSH authenticates using one or more of the following:
Password (the /etc/passwd or /etc/shadow in UNIX)
User public key (RSA or DSA, depending on the release)
Host-based (.rhosts or /etc/hosts.equiv in SSH1 or public key in SSH2)
What Does SSH Protect Against?
SSH provides strong authentication and secure communications over insecure channels.
It also provides secure connections that protect a network from attacks such as:
IP spoofing, where a remote host sends packets that pretend to originate from
another, trusted host. SSH even protects against a spoofer on the local network
that is pretending to be a router to the outside.
IP source routing, where a host pretends that an IP packet comes from another,
trusted host.
DNS spoofing, where an attacker forges name server records.
Interception of cleartext passwords and other data by intermediate hosts.
Manipulation of data by people in control of intermediate hosts.
Attacks based on listening to authentication data and spoofed connections to the
server.
Summary of Contents for EDS16PR
Page 83: ...8 Services Settings EDS Device Servers User Guide 83 Figure 8 7 HTTP Configuration Page ...
Page 86: ...8 Services Settings EDS Device Servers User Guide 86 Figure 8 8 HTTP Authentication Page ...
Page 94: ...9 Security Settings EDS Device Servers User Guide 94 Figure 9 1 SSH Server Host Keys Page ...
Page 99: ...9 Security Settings EDS Device Servers User Guide 99 Figure 9 4 SSH Client Users Page ...
Page 102: ...9 Security Settings EDS Device Servers User Guide 102 Figure 9 6 SSL Page Bottom ...
Page 137: ...11 Advanced Settings EDS Device Servers User Guide 137 Figure 11 9 XML Import from Filesystem ...
