> Source: [sk174863](https://support.checkpoint.com/results/sk/sk174863)

# sk174863 - Incorrect cipher name "chacha20-poly1305@openssh.comt" in the supported cipher list after upgrade to R81.10

| Property | Value |
|----------|-------|
| Solution ID | sk174863 |
| Date Created | 2021-08-09 |
| Last Modified | 2024-03-25 |
| Technical Level | General |
| Products | Security Gateway, Scalable Platforms, Security Management Server, Multi-Domain Security Management Server |
| Versions | R81.10 (EOS), R81.10 (EOS), R81.10 (EOS), R81.10 (EOS) |
| OS | Gaia |

## Symptoms

- * Incorrect cipher name `chacha20-poly1305@openssh.comt` is in the supported cipher list after an upgrade to R81.10.

  ![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk174863/Untitled202108100055151.png)
* The user can lose SSH to the Security Gateway/ Security/Management Server if he/she enabled the incorrect configuration in SSH cipher in Gaia OS.

* The user cannot configure the correct cipher `chacha20-poly1305@openssh.com`. 


  The user can configure the incorrect cipher `chacha20-poly1305@openssh.comt`.

## Cause

The specific cipher name `chacha20-poly1305@openssh.com` was corrupted during the upgrade.

<br />

## Solution

This problem was fixed. The fix is included in:

* [Jumbo Hotfix Accumulator for R81.10](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk175186) starting from Take 38

If you choose not to upgrade, follow these steps to correct the cipher name:  

1. Back up the */config/active* file before you run the script below. The script changes the */config/active* file.   

2. Click [here](https://supportcenter.checkpoint.com/supportcenter/portal?action=portlets.DCFileAction&eventSubmit_doGetdcdetails=&fileid=116919) to download the *fixciphername.sh* script  

3. Open the .tar file and copy the downloaded script *fixciphername.sh* to your Security Gateway/Security Management Server,   

4. Log in to Expert mode:  
`HostName> expert`  

5. Change the mod of the file:  
`[Expert@HostName]# /usr/bin/chmod +x fixciphername.sh`  

6. Run the file:  
`[Expert@HostName]# ./fixciphername.sh`  

7. Remove the file:  
`[Expert@HostName]# rm fixciphername.sh`

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