ESR series service routers.ESR-Series. User manual
To view PPTP server configuration, use the following command:
esr# show remote-access configuration pptp remote-workers
15.2 Configuring server for remote access to corporate network via L2TP protocol
L2TP (Layer 2 Tunneling Protocol) is a sophisticated tunneling protocol used to support virtual private
networks. L2TP encapsulates PPP frames into IP packets for transmission via global IP network, e.g. the
Internet. L2TP may be used for tunnel establishment between two local area networks. L2TP uses an
additional UDP connection for tunnel handling. L2TP protocol does not provide data encryption, therefore it is
usually combined with an IPsec protocol group that provides security on a packet level.
15.2.1 Configuration algorithm
Step Description Command Keys
1 Create L2TP server profile. esr(config)# remote-access
l2tp <NAME>
<NAME> – L2TP server profile name,
set by the string of up to 31
characters.
2 Specify the description of the
configured server (optional).
esr(config-l2tp-server)#
description <DESCRIPTION>
<DESCRIPTION> – L2TP server
description, set by the string of up to
255 characters.
3 Specify IP address that should be
listened by L2TP server.
esr(config-l2tp-server)#
outside-address
{ object-group <NAME> | ip-
address <ADDR> |
interface { <IF> | <TUN> } }
<OBJ-GROUP-NETWORK-NAME> –
name of the profile having IP address
that should be listened by L2TP
server, set by the string of up to 31
characters;
<ADDR> – range starting IP address,
defined as AAA.BBB.CCC.DDD where
each part takes values of [0..255];
<IF> – router interface type and
identifier;
<TUN> – router tunnel type and
number.
In addition to PPTP server creation, open TCP port 1723 designed for connection handling and
enable GRE protocol (47) for the tunnel traffic in the firewall.
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