The default port (and most common) is tcp/10000 but any port will do good. But, the port must be specified in the head end with the ‘ crypto isakmp ipsec-over-tcp port 10000′ command.
What ports does VPN Client use? - Cisco Community Hello there, I am working to configure a dynamic tunnel to our cisco asa 5505, yet there is a firewall infront of our cisco asa and we need to open ports for the VPN Client to be able to reach the cisco device. May someone please advice as to what How to enable a Cisco IPSec VPN client to connect to a Apr 19, 2018 Cisco ASA5500 Change the AnyConnect Port | PeteNetLive KB ID 0000422 . Problem. AnyConnect runs over TCP port 443 (That’s HTTPS/SSL), but if you only have one public IP and need to forward that port to a web server or internal host then you are a bit snookered. You can of course change the port that AnyConnect runs over, so that it’s no longer on TCP port 443.. Why you would NOT want to do this. Cisco AnyConnect VPN connected through a firewall | Freerk
Jul 02, 2020
The number and type of VPN ports utilized depends on the protocol used. For example, the PPTP protocol uses TCP port number 1723 to create a connection to IP port 47 Generic Routing Encapsulation (GRE) for packet encapsulation.
UDP port 500 is the ISAKMP port for establishing PHASE 1 of IPSEC tunnnel. VPN-GW1-----nat rtr-----natrtr-----VPNGW2. If two vpn routers are behind a nat device or either one of them, then you will need to do NAT traversal which uses port 4500 to successfully establish the complete IPEC tunnel over NAT devices.
White Paper Cisco Meraki Auto VPN bit AES-CBC tunnel. Meraki Auto VPN leverages elements of modern IPSec (IKEv2, Diffe-Hellman and SHA256) to ensure tunnel confidentiality and integrity. Local subnets specified in the dashboard by admins are exported across the VPN. 5 Cisco ystems Inc 0 Terr A Francois lvd an Francisco CA 415 415 32-100 sales@meraki.com You may also need to open UDP port 4500 (if NAT-T is being used). Further, if the clients are connecting to a VPN 3000 series Concentrator and it is configured for any of the other NAT-Transparency options, corresponding ports need to be opened. By default: 1. If IPSec over TCP 10000 is being used, then open TCP 10000. 2.