Remote-access Guide

cisco remote access vpn ports

by Kelvin Hegmann Published 2 years ago Updated 1 year ago
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The Cisco Anyconnect VPN client uses the following ports for functionality.
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Ports Required for VPN to Connect. KB0015544.
ProtocolCisco AnyConnect Client Port
TLS (SSL)TCP 443
SSL RedirectionTCP 80
DTLSUDP 443
IPsec/IKEv2UDP 500, UDP 4500

How to enable Cisco AnyConnect VPN through remote desktop?

To enable Cisco Anyconnect VPN through a remote desktop you must first create an Anyconnect Client Profile. The client profile is basically a XML file that gets pushed out to the client upon VPN establishment. This XML file can be created using a text editor or ASDM. I wouldn’t recommend using anything but the ASDM to create this file as you will see.

How to connect to Cisco router using telnet?

  • The “ line vty ” command enable the telnet and the “ 0″ is just let a single line or session to the router. ...
  • The “ password ” command set the “ Pass123 ” as a password for telnet. ...
  • The “ login ” command authenticate and ask you the password of telnet. ...
  • The “ logging synchronous ” command stops any message output from splitting your typing.

More items...

What is Cisco Systems VPN client?

Cisco Systems VPN Client is a software application for connecting to virtual private networks based on Internet Key Exchange version 1.. On July 29, 2011, Cisco announced the end of life of the product. No further product updates were released after July 30, 2012, and support ceased on July 29, 2014. The Support page with documentation links was taken down on July 30, 2016, replaced with an ...

How to configure Cisco IP SLA?

These steps are:

  • Creating IP SLA Operation
  • Configure IP SLA Operation as ICMP Echo
  • Set repeat frequency
  • Configure Schedule
  • Save The configuration

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What ports does Cisco VPN use?

Cisco AnyConnect uses VPN Tunnel via the default SSL port (TCP 443) and DTLS port (UDP 443).

What ports need to be open for VPN?

Which ports are best for VPN?Point-to-Point Tunneling Protocol (PPTP) — Port 1723 TCP.Layer Two Tunneling Protocol (L2TP) — Ports 1701 TCP, 500 UDP and 4500 UDP.Internet Protocol Security (IPSec) — Ports 500 UDP and 4500 UDP.Secure Socket Tunneling Protocol (SSTP) — Port 443 TCP.OpenVPN — Ports 1194 UDP and 443 TCP.

How does Cisco remote access VPN Work?

Remote and mobile users use the Cisco AnyConnect Secure VPN client to establish VPN sessions with the adaptive security appliance. The adaptive security appliance sends web traffic to the Web Security appliance along with information identifying the user by IP address and user name.

What port does IPSec VPN use?

Mobile VPN with IPSec requires the client to access the Firebox on UDP ports 500 and 4500, and ESP IP Protocol 50. This often requires a specific configuration on the client's internet gateway, so clients might not be able to connect from hotspots or with mobile Internet connections.

Do VPNs use different ports?

Different types of VPNs use different ports to establish a secure connection over the Internet. It all depends on the types of protocols that a certain VPN offers. Some providers choose to only support a handful of protocols, while others offer a broad range of VPN protocols.

How do I find my VPN port?

All you have to do is type “netstat -a” on Command Prompt and hit the Enter button. This will populate a list of your active TCP connections. The port numbers will be shown after the IP address and the two are separated by a colon.

What VPN protocol does Cisco AnyConnect use?

Cisco AnyConnect VPNs utilize TLS to authenticate and configure routing, then DTLS to efficiently encrypt and transport the tunneled VPN traffic, and can fall back to TLS-based transport where firewalls block UDP-based traffic.

How do I connect to a Cisco AnyConnect VPN?

ConnectOpen the Cisco AnyConnect app.Select the connection you added, then turn on or enable the VPN.Select a Group drop-down and choose the VPN option that best suits your needs.Enter your Andrew userID and password.Authenticate with 2fa (DUO).Tap Connect.

Does Cisco AnyConnect use IPsec or SSL?

Anyconnect is the replacement for the old Cisco VPN client and supports SSL and IKEv2 IPsec. When it comes to SSL, the ASA offers two SSL VPN modes: Clientless WebVPN.

Is IPsec a TCP or UDP?

IPsec uses UDP because this allows IPsec packets to get through firewalls. Decryption: At the other end of the communication, the packets are decrypted, and applications (e.g. a browser) can now use the delivered data.

Do I need port forwarding with VPN?

If you want to host a website from a device while connected to a VPN, you will need a port forward to direct traffic from the internet to a specified port in your local client, which is running the web server software.

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.

How do I allow VPN through firewall?

How to Open Windows Firewall Ports?Go to Settings.Go to Windows Defender Security Center.Open Virus & Threat protection settings.Click on Exclusions.Click on Add or remove exclusions.Click on Add an exclusion.Add your VPN client software.

What ports does Windows VPN use?

After the forwarding, you can connect from Windows to a server behind the NAT. For PPTP, you need to forward TCP port 1723 and GRE protocol, SSTP — TCP 443, and OpenVPN UDP port 1194 by default.

What is the protocol used to access information?

The two access protocols are HTTP and HTTPS. HyperText Transfer Protocol (HTTP) is used to access information and distribute it through internet using the connection that the server and the host establish. HyperText Transfer Protocol Secure (HTTPS) also is used to access and distribute information through internet but with the advantage ...

How to access RV315W?

Step 1. Log in to the web configuration utility and choose System Management > Remote Management > Remote Access Protocol. The Remote Access Protocol and Ports page opens: Step 2. In the HTTP field, click the Enable radio button to allow the RV315W to be remotely accessed through the use of HTTP. Users only with HTTP meeting access profile method ...

What protocol does Cisco use for VPN?

The network administrator prefers to use a connection-oriented protocol such as TCP. With IPSec over TCP, the security appliance negotiates the VPN tunnel using TCP as the protocol over a preconfigured port. When the tunnel is up, both VPN devices (Cisco ASA and the VPN client) pass traffic using the same connection.

How to check if firewall is running?

The Cisco VPN client can check to see if the firewall service on the machine is running by sending periodic keepalives, also known as "Are you there" (AYT) messages , to the specified firewall. If the firewall service on the client machine is not running, the VPN client fails to establish the secured connection.

What is Cisco123 key?

In Example 16-35, a key of cisco123 is used to encrypt traffic between the security appliances in the cluster. If there is a mismatch in the key, the security appliance fails to join the cluster. Example 16-35. VPN Load-Balancing Configuration with Encryption.

Does VPN use NAT-T?

This is useful in scenarios where the VPN clients do not support NAT-T and are behind a firewall that does not allow ESP packets to pass through. In IPSec over UDP, the IKE negotiations still use UDP port 500. During the negotiations, Cisco ASA informs the VPN client to use IPSec over UDP for data transport.

Does Cisco ASA support IPSEC?

However, in case of an IPSec VPN tunnel, Cisco ASA supports receiving the IPSec traffic from one VPN tunnel and then redirecting it into the other one, if both tunnels terminate on the same interface. This feature is known as IPSec hairpinning.

What is VPN_POLICY?

The group policy is called VPN_POLICY and it’s an internal group policy which means it is created locally on the ASA. You can also specify an external group policy on a RADIUS server. I added some attributes, for example a DNS server and an idle timeout (15 minutes). Split tunneling is optional but I added it to show you how to use it, it refers to the access-list we created earlier.

How many interfaces does an ASA have?

The ASA has two interfaces: inside and outside. Imagine the outside interface is connected to the Internet where a remote user wants to connect to the ASA. On the inside we find R1, I will only use this router so the remote user has something to connect to on the inside network. Let’s look at the configuration!

Does Cisco VPN require ASA?

The remote user requires the Cisco VP N client software on his/her computer, once the connection is established the user will receive a private IP address from the ASA and has access to the network .

Can remote VPN users access certain networks?

If you want to configure an access-list so the remote VPN users can only reach certain networks , IP addresses or ports then you can apply this under the group policy.

Can you use VPN on remote network?

If you don’t want this then you can enable split tunneling. With split tunneling enabled, we will use the VPN only for access to the remote network. Here’s how to enable it:

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.

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.

How does Portnox CLEAR work?

Portnox CLEAR controls secure remote access to the network by verifying user identity credentials and allowing connections for devices that have a low risk-assessment score. It continuously monitors the “health” state of both corporate and personal (BYOD) devices as they attempt to connect to the network and for as long as they remain connected. It also includes the option of enabling two-factor authentication for VPN connections.

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.

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:

When remote users connect to our WebVPN, do they have to use HTTPS?

The following option is not required but useful, whenever someone accesses the ASA through HTTP then they will be redirected to HTTPS:

What happens when a VPN user terminates a session?

Normally when the remote VPN user terminates the session, the anyconnect installer will be uninstalled. The anyconnect keep-installer installed command leaves it installed on the user’s computer.

What happens when you have an inbound access list?

When you have an inbound access-list on the outside interface then all your decrypted traffic from the SSL WebVPN has to match the inbound access-list. You can either create some permit statements for the decrypted traffic or you can just tell the ASA to let this traffic bypass the access-list:

What is AnyConnect VPN?

Anyconnect is the replacement for the old Cisco VPN client and supports SSL and IKEv2 IPsec. When it comes to SSL, the ASA offers two SSL VPN modes: Clientless WebVPN. AnyConnect VPN. The clientless WebVPN method does not require a VPN client to be installed on the user’s computer. You just open your web browser, ...

Why does my client tries to download AnyConnect?

The client tries to download the Anyconnect automatically, this is because of the anyconnect ask none default anyconnect command that we used. Since we are using a self-signed certificate you will get the following error message:

What is the IP address of AnyConnect?

You can see that we received IP address 192.168.10.100 (the first IP address from the VPN pool). Anyconnect creates an additional interface, just like the legacy Cisco VPN client does.

What is an ayconnECT_policy?

The group policy is called “ANYCONNECT_POLICY” and it’s an internal group policy which means that we configure it locally on the ASA. An external group policy could be on a RADIUS server.

What is PPTP in a network?

PPTP (Point to Point Tunneling Protocol) is a quick and easy solution to offer remote access to users.

Is Cisco ASA Firewall Fundamentals self published?

He is a self-published author of two books ("Cisco ASA Firewall Fundamentals" and "Cisco VPN Configuration Guide") which are available at Amazon and on this website as well.

Can a remote user use PPTP?

Like other types of remote access solutions, a remote user can use PPTP to connect to a corporate network and be treated as directly connected to that internal network even if he/she is physically outside the network. PPTP is always implemented between a server (e.g a Cisco router) and a client (e.g a windows workstation).

Does Cisco ASA support PPTP?

Cisco supports PPTP on its IOS routers. Cisco ASA firewalls do not support termination of PPTP on the firewall itself.

Does PPTP work with IPSEC?

However, you should note that PPTP does not offer the strong encryption and security offered by IPSEC or SSL VPN remote access solutions. Although the Microsoft Point-to-Point Encryption (MPPE) supported by Cisco routers offers a good degree of security, PPTP remote access should not be used in situations where you need to provide access ...

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