Solutions to common problems of remote access networks

There are many things worth learning about remote access networks. Here we mainly introduce the application difficulties and solutions of remote access networks. With the expansion of enterprise business, the number of branches will also increase, and the demand for remote or mobile office will also increase. This requires the application of remote access technology. Generally, the connection methods between different operating points of an enterprise can be divided into three types: private data transmission, VPN, and terminal services. The most common connection mode is VPN Remote Access Network.

However, in actual use, no matter whether it is a remote connection person or an enterprise network administrator, it is easy to have a lot of questions in the implementation process of the Remote Access Network. At the same time, some inherent defects and security risks of VPN and other remote access networks may also cause problems. In this article, we will briefly analyze some common application problems and propose corresponding solutions for your reference.

I. Windows VPN Remote Access Network

Problem: The company has established a VPN Network Based on the Windows platform, but the remote client cannot connect normally. Problem solving: Generally, the VPN Server must be properly configured to allow remote access. For remote clients, the most important troubleshooting direction is to check whether their accounts are correct, and verify whether it has the ability to connect to the server.

The most common solution is to check the server to see if it has enabled the IP routing function and whether it has been set to an IP address that can be assigned. In addition, there are also many other features related to VPN sessions, such as identity recognition and encryption, which may also cause faults.

2. Remote Access cannot be connected through domain names

Problem: in an enterprise network, a Windows 2003 system is installed on the server. routes and remote access have been configured to ensure smooth connection between the Intranet and the Internet. domain name resolution and other Internet connection operations have also been completed. However, on the remote office end, the connection cannot be achieved through the domain name.

Solution: the internal network can be smoothly connected and various network services can be used, and thus the external network services cannot be determined to be normal. If a remote connection fails after a period of correct access, you can view the fault source through the server running log, and check whether firewall protection is enabled. If the VPN service is not passed in the firewall configuration, the connection will fail. In addition, if conditions permit, consider upgrading the current vro hardware and setting the DMZ Host to see if the problem can be solved, many problems may occur due to the obsolete hardware program of the router.

Iii. Security of Remote Access Networks

Q: How do I consider the security of remote access networks when experiencing their convenient and fast network applications? Solution: indeed, a remote access network like a VPN has the greatest impact on the overall transmission quality. Of course, as long as you take appropriate preventive measures on the remote server side, you can prevent security risks to a certain extent. Generally, the security configuration of the Remote Access Router is as follows:

1: log on to your account. We all know that vrouters all have their own default logon accounts. If you do not pay attention to the subsequent modifications, after enabling the remote control function of the vro, other users in the public network have the opportunity to access the vro. The modified account information must be complex enough to achieve the expected results.

2: Enable Secure Remote Control. By default, the vro uses port 80 to provide remote management, which is also vulnerable to attacks. Therefore, you must modify the port number and use an uncommon port to provide remote management.

By default, access from all public networks is disabled to enable IP address control for specific clients. For example, on the vro management interface, enter the IP address of a public computer that can remotely control the vro in the "remote Web management IP Address" option, this temporary session is used to ensure the security of the Remote Access Network. After the connection is completed, the session is closed immediately.

It is undeniable that the emergence of remote access networks greatly saves the construction and operation and maintenance costs of Wan, and also makes it the best choice for enterprises to connect to the network between ERP operation points; however, in the actual application process, in addition to the security of remote connection, you should also pay attention to summing up the troubleshooting methods in operation through practice so that you can better use the remote access network to serve enterprise development.