Remote-access Guide

how to secure remote access to a cisco device

by Karli Ferry Published 2 years ago Updated 1 year ago
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Remote access should use the more secure option for remote access: SSHv2 over Telnet; SCP (Secure Copy Protocol) over FTP or TFTP; HTTPS over HTTP. The foundational security for each is based on the configuration for SSHv2. A hostname has to be configured as well as a domain name.

Full Answer

What is the best way to secure remote access?

Remote access should use the more secure option for remote access: SSHv2 over Telnet; SCP (Secure Copy Protocol) over FTP or TFTP; HTTPS over HTTP. The foundational security for each is based on the configuration for SSHv2. A hostname has to be configured as well as a domain name.

How to verify that I have configured the Cisco switch for remote management?

Router0 (config-if)#ip address 192.168.1.2 255.255.255.0 To verify that I have configured the Cisco switch for remote management via ssh, I try to access the switch using the laptop on the network 192.168.0.0/24 using ssh. Remember that both the laptop and the switch are on different networks. See the result below.

What is the best way to manage remote devices?

An efficient way to manage remote devices is to use VTY access, which is CLI-based remote access using Telnet or SSH. Telnet uses TCP port number 23. Telnet is a simple protocol and does not encrypt communications.

How do I remotely log in to another device using SSH?

Cisco routers and Catalyst switches can also provide VTY access to other devices as an SSH client. use the following commands in user EXEC or privileged EXEC mode to remotely log in to other devices as an SSH client. Remote Login via SSH #ssh -l <user> {<ip-address|host-name>}

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How do I secure a remote access?

Basic Security Tips for Remote DesktopUse strong passwords. ... Use Two-factor authentication. ... Update your software. ... Restrict access using firewalls. ... Enable Network Level Authentication. ... Limit users who can log in using Remote Desktop. ... Set an account lockout policy.

How do I secure my Cisco router?

Here are the essentials:Physically secure the routers. ... Lock down the router with passwords. ... Apply login mode passwords on Console, AUX, and VTY (telnet/ssh) interfaces. ... Set the correct time and date. ... Enable proper logging. ... Back up router configurations to a central source.More items...•

Which protocol is secure for remote access?

Remote Desktop Protocol (RDP)Remote Desktop Protocol (RDP) is a Microsoft proprietary protocol that enables remote connections to other computers, typically over TCP port 3389. It provides network access for a remote user over an encrypted channel.

How do you secure remote access to employees?

7 Best Practices For Securing Remote Access for EmployeesDevelop a Cybersecurity Policy For Remote Workers. ... Choose a Remote Access Software. ... Use Encryption. ... Implement a Password Management Software. ... Apply Two-factor Authentication. ... Employ the Principle of Least Privilege. ... Create Employee Cybersecurity Training.

Which type of access is secured on a Cisco router?

3. Which type of access is secured on a Cisco router or switch with the enable secret command? The enable secret command secures access to the privileged EXEC mode of a Cisco router or switch.

Can Cisco routers be hacked?

The first is a bug in Cisco's IOS operating system—not to be confused with Apple's iOS—which would allow a hacker to remotely obtain root access to the devices. This is a bad vulnerability, but not unusual, especially for routers. It can also be fixed relatively easily through a software patch.

What is the most secure remote access?

Best for Team Collaboration TeamViewer TeamViewer lets users access remote computers and devices running Windows, Mac OS, Linux, Android, and iOS. It also offers drag-and-drop file transfer, remote printing, and secure unattended access using two-factor authentication and 256-bit AES encryption.

What are the three types of remote connections?

Remote Access Control MethodsDirect (Physical) Line. The first direct remote access control that can be implemented is a direct line from a computer to the company's LAN. ... Virtual Private Network. Another method which is more common is establishing a VPN. ... Deploying Microsoft RDS.

Why is port 443 secure?

HTTPS is secure and is on port 443, while HTTP is unsecured and available on port 80. Information that travels on the port 443 is encrypted using Secure Sockets Layer (SSL) or its new version, Transport Layer Security (TLS) and hence safer.

Which is more secure to use when connecting to a device virtually?

VPNs allow employees working remotely to connect to a corporate network by routing their activity through a secure server. VPN systems encrypt data transmitted over the network, so that data is unusable to an attacker eavesdropping on the connection.

What allows for secure remote console access?

You can enable remote access (dial-up or VPN), Network Address Translation (NAT), both VPN and NAT, a secure connection between two private networks (site-to-site VPN), or you can do a custom configuration to select any combination of these, as shown in Figure 14.25.

How do I configure a secure router?

How to set up Wi-Fi router securely: The specificsUpdate your router with new firmware and keep it up to date.Change your login credentials and router password.Always use WPA2 to secure your wireless network.Disable WPS.Schedule your wireless network's online schedule.Get rid of any risky or unverified services.More items...•

What are the commands that can be used to secure the switch?

Table 2-11 Cisco Switch IOS CLI Commands for Dynamic Port SecuritySpecify the interface to be configured for port security.S1(config)# interface fastethernet 0/18Set the interface mode to access.S1(config-if)# switchport mode accessEnable port security on the interface.S1(config-if)# switchport port-securityMar 31, 2014

How do I configure basic router security?

0:2410:14FREE CCNA Lab 001: Basic Router Security Configuration 1 - YouTubeYouTubeStart of suggested clipEnd of suggested clipI will refer to these as the gig 0 0 interfaces. Click on connections in the bottom left and selectMoreI will refer to these as the gig 0 0 interfaces. Click on connections in the bottom left and select the cable connected to the gig 0 0 interface on r1.

How do I secure my network in Packet Tracer?

0:034:46Cisco Packet Tracer Create and Secure a Basic Wireless NetworkYouTubeStart of suggested clipEnd of suggested clip5.1 and then we're going to set the subnet mask to 255 255.255. 0 and then we can close that andMore5.1 and then we're going to set the subnet mask to 255 255.255. 0 and then we can close that and then on the end devices we're going to put a laptop on the working board in devices.

What is Cisco Secure Managed Remote Access?

Cisco Secure Managed Remote Access is a scalable cloud service delivering on-demand, secure remote connectivity for your organization. It is managed by Cisco and enables you to rapidly scale up and provide your workforce with access to corporate resources from any location. Flexible, OpEx-based subscription pricing allows you to reduce your costs by paying only for what you need. The service is currently available in the United States, with global expansion to follow. It provides outcomes-based management and monitoring, ensuring uptime and reliable service.

How many devices does Cisco manage?

Cisco Manages over one million devices for companies in 175 countries across 38 industries. We understand the operational model and how to deliver effective managed operations.

Why is remote work important?

Remote work has often shifted the focus of IT teams to ensure their workforce has secure remote access. To enable business continuity and growth, organizations must be able to respond to changes quickly and deliver consistent, secure remote access to workers everywhere.

How has the shift to remote work changed organizations?

The shift to remote work has changed organizations’ IT and security needs and expectations. The demand for anytime, anywhere access is unprecedented. Users are accessing sensitive corporate resources across their data centers, private cloud, and public cloud applications from multiple devices and locations. Companies recognize that remote work is here to stay, creating new network and security demands.

How many customers does Cisco have?

Cisco is the market leader in secure remote access, with over 60,000 customers worldwide and 180 million endpoints connected.

How to add VPN to AnyConnect?

Navigate to Configuration > Remote Access VPN > Network (Client) Access > AnyConnect Connection Profiles, and in the Connection Profiles section click Add.

Why are VPNs used?

In general, VPNs and cloud applications have become commonly used tools by all of us, as they allow remote employees convenient access to much-needed company data.

Does VPN provide security?

From a security standpoint, a VPN will ensure the encryption of the traffic to the network, (and even include two-factor authentication), but it will not be able to provide information regarding the security posture of the endpoint. Furthermore, a VPN will not know if a device is compliant with security standards, and is oblivious to the risks connecting devices might pose to your company network. Moreover, VPNs do not provide a way to block the device from connecting to the VPN based on its security posture. Thus, they do not offer a means for proper secure remote access.

Is there a built in system monitoring endpoint?

Typically, there isn’t a built-in system monitoring the endpoint while it is connecting to the VPN. As we previously discussed, you need to layer a secure remote access solution on top of your corporate VPN so that at any given moment, endpoints can be denied access should their risk levels pass a pre-determined threshold.

Does Portnox require a username and password?

For successful VPN authentication using Portnox CLEAR RADIUS and 2FA with Portnox AgentP, users are required to provide their username + password. These will be verified with the specific AgentP on the device requesting access, to confirm that the device is the one it claims to be:

Objective

The objective of this lab is to configure the switch for remote management such that the laptop PC residing on a remote network be used to login and manage it via ssh . To accomplish this, the following will be done:

Implementation

The following configuration commands will the required to configure a Cisco switch for remote management. The commands used here a for the lab represented in the network topology used here. However, the solution can be achieved in many different ways.

Verification

To verify that I have configured the Cisco switch for remote management via ssh, I try to access the switch using the laptop on the network 192.168.0.0/24 using ssh. Remember that both the laptop and the switch are on different networks. See the result below.

What is Cisco Secure Endpoint?

Cisco Secure Endpoint New packages fit for every organization Every Cisco Secure Endpoint (formerly AMP for Endpoints) package comes with Cisco SecureX built-in. It’s our cloud-native platform that integrates all your security solutions into one view wit... view more

Do you need to set IP domain name for generating key?

Apart from those commands as sandeep stated here... you need to set ip domain-name as well for generating the key. Because you key will get generated based on your hostname... i.e. .

Is Cisco 1841 compatible with Cisco 1841?

Those advanced IP Services are compatible with cisco 1841 routers..... current IOS is in specific to broadband which has some limited facilities..... for eg advip ios has much more features of IP SLA but broadband IOS has only IP SLA Responder feature.... Like this way you have many other differences mate....

Is Cisco Secure a partner of IBM?

This month, we're excited to bring awareness to a newly formed partnership between Cisco Secure and IBM. Securing today's dynamic enterprise applications is critical. With hybrid and multi-cloud adoption, traditional network-based security ran into limita... view more

Does Cisco IOS support SSH?

You will need an image that supports SSH (images with k9) Yes. Starting with Cisco IOS Software Release 12.4 (1), SSH is supported in all images with the following exceptions: IP Base without Crypto and Enterprise Base without Crypto. Use this command: Router (config)# crypto key generate rsa.

What is Cisco Secure Endpoint?

Cisco Secure Endpoint New packages fit for every organization Every Cisco Secure Endpoint (formerly AMP for Endpoints) package comes with Cisco SecureX built-in. It’s our cloud-native platform that integrates all your security solutions into one view wit... view more

Should I separate my lab from my home network?

Personally, I would recommend you separate your lab from your home network 100%.

Can the WRT300N use VPN?

I've already confirmed that the WRT300N can allow VPN pass-through (PPTP, IPSec, L2TP), and if I'm not mistaken it would appear I am able to segment the home network from the lab network with a feature called Static Routing.To confirm, dispute, or deny any of these assumptions, I've attached the owner's manual to this particular device for review if necessary.

How to accept VTY access from remote user?

To accept VTY access from a remote user, you basically have to authenticate; in the case of Telnet access, you can authenticate with a password on the VTY line or with a username/password defined by the router.

When you remotely log in to a Cisco router or switch via Telnet/SSH, what is the output?

When you remotely log in to a Cisco router or Catalyst switch via Telnet/SSH, no logs are output by default. If you want to output the log of the remote login destination, enter the terminal monitor command in privileged EXEC mode.

What is VTY Access?

An efficient way to manage remote devices is to use VTY access, which is CLI-based remote access using Telnet or SSH.

Can Cisco routers use SSH?

Cisco routers and Catalyst switches can also provide VTY access to other devices as an SSH client. use the following commands in user EXEC or privileged EXEC mode to remotely log in to other devices as an SSH client.

Can you enable SSH on VTY?

You can enable SSH on VTY. SSH is enabled by default by transport input all, so you don’t need to configure it.SSH requires username and password authentication. login local command to enable username and password authentication.

How to protect a switch from a MAC address?

The data plane for a switch must be protected against bogus Media Access Control (MAC) addresses, rogue devices attaching themselves to the switch and those trying to spoof addressing across the switch. One potential attack is to fill the layer 2 forwarding table with bogus MAC addresses. To help protect the forwarding table from bogus source MAC addresses, use port security, which locks down the ports to a specific number of source MAC addresses that can be seen on a port as well as which address are legal on a given port. If there are too many source MAC addresses or the wrong MAC addresses as sources, port security registers a violation. The default table size for a port that has port security enabled on it is one (one MAC address only), and the default violation is shutdown, which actually puts the port into an errdisabled state.

What is enable secret?

The enable secret uses a Message Digest 5 (MD5) hashing algorithm to encrypt the password in the configuration; the enable password does not. If the service password encryption command is used, the enable password and the line level password will be encrypted but with a much more simplistic method.

How to protect IGPs?

The Interior Gateway Protocols (IGPs) can be protected through authentication and route filter like BGP. The configuration for authentication depends on the protocol and version of code. EIGRP, for instance, using a keychain to configure the key string for the authentication is then applied to the interfaces. The mode of authentication for EIGRP is MD5. (SHA is an option to the other protocols.) RIPv2 also uses a keychain, but the mode of authentication can be clear text or MD5. OSPFv2 can be configured for area level or link level authentication. The password is defined at the link level. OSPFv2 supports clear text or MD5 authentication (later version of code supports using a keychain and SHA). OSPFv3 using IP Security (IPsec) to protect the protocol. Whatever crypto capability is available in the code is available to authenticate and/or encrypt the OSPF packets. IS-IS uses two levels to apply authentication: process level or link level. IS-IS can be configured using clear text or MD5 and has the option to use a keychain or apply the password directly. The process level application then includes all interfaces on which IS-IS is configured, but unlike OSPFv2, the password or keychain is configured under the process. The following are examples of configuring authentication for the IGPs:

What is BGP security?

It is the routing protocol that makes it possible to have the number of networks attached to the Internet that we do today. However, that also means it is a main target for disruption or redirection to an unintended target. Some of the security features available for BGP are authentication, Time to Live (TTL) security, maximum prefix received and route filtering. BGP authentication is based on MD5, but depending on version of code, Secure Hash Algorithm (SHA) could be used. The authentication method used will be dependent on what is available to the peers that BGP is neighboring up to. (SHA for different routing protocols will be covered in another article.) To configure MD5, simply use a neighbor statement with the keyword password followed by the password. (Example: neighbor 192.168.5.1 password cisco.)

What is CoPP in router?

Control Plan Policing (CoPP) allows us to control those applications and others that are potentially disruptive to the control plane. (Even the lowly echo can be disruptive if there are too many being sent to the router or switch.) We use Modular QoS Command Line Interface (MQC) to configure a policy that would police traffic destined to the router or switch itself. Use the class maps to define the different types of traffic heading to the router or switch; next, in the policy map, define policers to limit how much can be sent and apply to the control plane under the global control-plane command to get to the control plane sub-configuration mode. Finally, apply the service policy to the control at that point.

How to lock out a user after a failed login?

Using the Login Password Retry Lockout feature is also recommended. This allows you to lock out a local user account after a specific number of failed attempts to log into the system. Use the aaa local authentication attempts max-fail < max-attempts > command to enable this feature. Note that users that are configured for level 15 privilege are not affected by this feature.

What is the most vulnerable network infrastructure?

Routers and switches make up the bulk of network infrastructure and are vulnerable to attack. We hear about mass Denial of Service (DOS) attacks or Distributed Denial of Service (DDOS), but the network itself is as big a risk because if it is taken out, there is no path for the data to flow. Although network infrastructure is vital, we also need to protect the networking devices themselves from attack; this protection is known as hardening. Firewalls will help along with Intrusion Prevention Systems (IPS), but there are additional steps we can take to harden the routers and switches within our network.

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