> Source: [sk172485](https://support.checkpoint.com/results/sk/sk172485)

# sk172485 - Endpoint  Security Clients may disconnect after an upgrade of the Endpoint Security Server

| Property | Value |
|----------|-------|
| Solution ID | sk172485 |
| Date Created | 2021-03-11 |
| Last Modified | 2023-06-01 |
| Technical Level | Advanced |
| Products | Endpoint Security |
| Versions | R81.20, R81.10 (EOS), R81 (EOS) |

## Symptoms

- * Endpoint Security Clients may disconnect after installing R81 Jumbo Hotfix Take 13 or 17 on an Endpoint Security Server that was upgraded from R80.40 or lower version.

* The UEPM Apache port is reconfigured to 4434 and Gaia Portal port to 443.

* The Endpoint Security Client's `%PROGRAMDATA%\CheckPoint\Logs\cpda.log` file shows:

  `
  Failed curl_perform, error: 35 (== SSL connect error) [CHTTPCall_curl::sendReq_internal] `  
  `
  CURL error description: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol [CHTTPCall_curl::sendReq_internal]
  `
* The Endpoint Security Client's `%PROGRAMDATA%\CheckPoint\Logs\cpda.log` file shows: \[error\] Failed curl_perform, error: 7 (== Couldn't connect to server), decription 'Failed to connect to port 443 after 2109 ms: Connection refused'

## Solution

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