Lantronix EDS2100 EDS1100 / EDS2100 - User Guide - Page 70

PPP Settings, To find a DNS Name or IP Address, Lookup, To clear cache entries, Remove All, Delete

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10: Service Settings To find a DNS Name or IP Address: 1. Enter either a DNS name or an IP address. 2. Click Lookup.  When a DNS name is resolved, the results appear in the DNS cache.  When an IP address is resolved, the results appear in a text below the Lookup field. To clear cache entries: 1. Click Remove All to remove all listed cache entries. 2. Click Delete next to a specirfic cache entry to remove only that one. PPP Settings Point-to-Point Protocol (PPP) establishes a direct connection between two nodes. It defines a method for data link connectivity between devices using physical layers (such as serial lines). The EDS1100/2100 supports two types of PPP authentication: Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP). Both of these authentication methods require the configuration of a username and password. PAP authentication offers a straightforward method for the peer to determine its identity. Upon the link establishment, the user ID and password are repeatedly sent to the authenticator until it is acknowledged or the connection is terminated. However, PAP is not a strong authentication process. There is no protection against trial-and-error attacks. The peer is responsible for the frequency of the authentication communication attempts. CHAP is a more secure method than PAP. It works by sending a challenge message to the connection requestor. Using a one-way hash function, the requestor responds with its value. If the value matches the server's own calculations, authentication is provided. Otherwise, the connection is terminated. Note: RFC1334 defines both CHAP and PAP. The EDS1100/2100 also supports authentication scheme of "None" when no authentication is required during link negotiation. Since the EDS1100/2100 does not support Network Address and Port Translation (NAPT), static routing table entries must be added to the serial-side and network-side devices (both of which are external devices). Use the EDS1100/2100 Web Manager or CLI to configure a network link using PPP over a serial line. Turn off Connect Mode, Accept Mode, and Command mode before enabling PPP. The EDS1100/2100 device acts as the server side of the PPP link; it can require authentication and assign an IP address to the peer. Upon PPP configuration, IP packets are routed between Ethernet and PPP interfaces. The EDS1100/2100 does not perform network address translation (NAT) between the serial-side network interface and the Ethernet/WLAN network interface. Therefore, to pass packets through the EDS1100/2100, a static route must be configured on both the PPP Peer device and the remote device it wishes to communicate with. The static route in the PPP Peer device must use the PPP Local IP Address as its gateway, and the static route in the remote device must use the network interface IP Address of the EDS1100/2100 as its gateway. EDS1100/2100 User Guide 70

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10: Service Settings
EDS1100/2100 User Guide
70
To find a DNS Name or IP Address:
1.
Enter either a DNS name or an IP address.
2.
Click
Lookup
.
When a DNS name is resolved, the results appear in the DNS cache.
When an IP address is resolved, the results appear in a text below the Lookup field.
To clear cache entries:
1.
Click
Remove All
to remove all listed cache entries.
2.
Click
Delete
next to a specirfic cache entry to remove only that one.
PPP Settings
Point-to-Point Protocol (PPP) establishes a direct connection between two nodes. It defines a
method for data link connectivity between devices using physical layers (such as serial lines).
The EDS1100/2100 supports two types of PPP authentication: Password Authentication Protocol
(PAP) and Challenge Handshake Authentication Protocol (CHAP). Both of these authentication
methods require the configuration of a username and password.
PAP authentication offers a straightforward method for the peer to determine its identity. Upon the
link establishment, the user ID and password are repeatedly sent to the authenticator until it is
acknowledged or the connection is terminated. However, PAP is not a strong authentication
process. There is no protection against trial-and-error attacks. The peer is responsible for the
frequency of the authentication communication attempts.
CHAP is a more secure method than PAP. It works by sending a challenge message to the
connection requestor. Using a one-way hash function, the requestor responds with its value. If the
value matches the server’s own calculations, authentication is provided. Otherwise, the connection
is terminated.
Note:
RFC1334 defines both CHAP and PAP.
The EDS1100/2100 also supports authentication scheme of “None” when no authentication is
required during link negotiation.
Since the EDS1100/2100 does not support Network Address and Port Translation (NAPT), static
routing table entries must be added to the serial-side and network-side devices (both of which are
external devices).
Use the EDS1100/2100 Web Manager or CLI to configure a network link using PPP over a serial
line. Turn off Connect Mode, Accept Mode, and Command mode before enabling PPP. The
EDS1100/2100 device acts as the server side of the PPP link; it can require authentication and
assign an IP address to the peer. Upon PPP configuration, IP packets are routed between
Ethernet and PPP interfaces.
The EDS1100/2100 does not perform network address translation (NAT) between the serial-side
network interface and the Ethernet/WLAN network interface. Therefore, to pass packets through
the EDS1100/2100, a static route must be configured on both the PPP Peer device and the remote
device it wishes to communicate with. The static route in the PPP Peer device must use the PPP
Local IP Address as its gateway, and the static route in the remote device must use the network
interface IP Address of the EDS1100/2100 as its gateway.