Verify the Current Conﬁguration

146Troubleshooting the NVG

Cannot Connect to VPN Gateway through Telnet or

SSH

Connect through a console connection and check that Telnet or SSH access to the VPN Gateway is enabled. By default, remote connections to the NVG are disabled for security reasons. Type the command /cfg/sys/adm/cur to see whether remote access through Telnet or SSH is enabled.

>># /cfg/sys/adm/cur Collecting data, please wait...

Administrative Applications: CLI idle timeout = 1h Telnet CLI access = off

SSH CLI access = off

Enable Telnet or SSH Access

If your security policy affords enabling remote connections to the VPN Gateway, type the command /cfg/sys/adm/telnet to enable Telnet access, or the command /cfg/sys/adm/ssh to enable SSH access. Apply your configuration changes.

>># /cfg/sys/adm/ssh

Current value: off

Allow SSH CLI access (on/off): on

>> Administrative Applications# apply

Changes applied successfully.

Check the Access List

If you find that Telnet or SSH access is enabled but you still can’t connect to the VPN Gateway using a Telnet or SSH client, check whether any hosts have been added to the Access List. Type the command /cfg/sys/accesslist/list to view the current Access List.

>># /cfg/sys/accesslist/list

1:192.168.128.78, 255.255.255.0

When Telnet or SSH access is enabled, only those hosts listed in the Access List are allowed to access the VPN Gateway over the network. If no hosts have been added to the Access List, this means that any host is allowed to access the VPN Gateway over the network (assuming that Telnet or SSH access is enabled).

Nortel VPN Gateway

User Guide

NN46120-104 02.01 Standard

14 April 2008

NN46120-104 specifications

Nortel Networks NN46120-104 is a versatile and efficient telecommunications hardware platform designed to meet the demands of modern networking environments. As a part of Nortel’s extensive portfolio, this device showcases the company’s commitment to innovation and reliability in the telecom sector.

One of the main features of the NN46120-104 is its robust performance capabilities. This platform is capable of handling high traffic volumes, making it suitable for medium to large enterprises. With its advanced routing capabilities and support for various protocols, the device ensures seamless communication across multiple network segments, providing efficient data transfer and connectivity.

The NN46120-104 is built upon the foundation of Nortel's renowned Layer 3 switching technology. This allows it to intelligently direct data packets based on their IP addresses, optimizing both speed and reliability. The inclusion of Virtual LAN (VLAN) support enhances network segmentation, improving security and management while reducing broadcast domains.

In terms of interface options, the NN46120-104 supports an array of Ethernet configurations, including Gigabit and Fast Ethernet ports. This flexibility allows organizations to tailor their networking solutions to their specific needs while enabling easy upgrades as technology evolves. The device also supports Power over Ethernet (PoE), facilitating the deployment of powered devices like IP phones and wireless access points without the need for additional power sources.

Another significant characteristic of the NN46120-104 is its robustness in terms of security features. With support for advanced security protocols and features such as Access Control Lists (ACLs), the device helps safeguard sensitive data by controlling traffic flow and restricting unauthorized access.

Additionally, the NN46120-104 is designed for ease of management. It offers an intuitive interface and supports various management protocols, including Simple Network Management Protocol (SNMP), enabling administrators to monitor and configure the device efficiently.

In summary, the Nortel Networks NN46120-104 combines high performance, extensive connectivity options, advanced security features, and ease of management, making it a formidable choice for enterprises looking to enhance their network infrastructure. Its capabilities align well with the rigorous demands of today’s digital communication landscape, ensuring reliability and efficiency in organizational operations.

Nortel Networks NN46120-104 manual Cannot Connect to VPN Gateway through Telnet or

Models: NN46120-104

Cannot Connect to VPN Gateway through Telnet or

SSH