# No TCP Connection to Cisco1111 Port 443 running FlexVPN

**URL:** https://forum.networklessons.com/t/no-tcp-connection-to-cisco1111-port-443-running-flexvpn/31874
**Category:** Security
**Created:** [October 30, 2022, 2:04pm UTC](https://forum.networklessons.com/t/no-tcp-connection-to-cisco1111-port-443-running-flexvpn/31874 "2022-10-30T14:04:14Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis)
#### Post date: [November 2, 2022, 11:01am UTC](https://forum.networklessons.com/t/no-tcp-connection-to-cisco1111-port-443-running-flexvpn/31874/2 "2022-11-02T11:01:46Z")

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Hello Johann

Take a look at this post:

> [@FlexVPN Remote Access AnyConnect](https://forum.networklessons.com/t/flexvpn-remote-access-anyconnect/13738/18):
>
> Hello Johann When you configure any type of VPN on a device, if you take no further action, only one VPN client can connect to the VPN at any one time. Remember, the VPN functionality takes place at Layer 3. Yes, IKE negotiation uses UDP 500, but that’s just for IKE. The actual traffic is sent using regular TCP and UDP ports as determined by the applications using them. This is a “problem” that exists whether you are attempting to connect multiple VPN clients to a single VPN headend device,…

I hope this has been helpful!

Laz

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