Sophos Central for linux install from cache server

Hi ecompo 

Unfortunately, there is no option available for installation from an update cache for Linux computers. Internet connectivity is required for initial installation. The installer will automatically check connectivity to any update caches set up in your Central account and install from them if appropriate. Linux computers can use relay or cache for updating(provided Linux distributions are supported by Sophos Anti-Virus for Linux). Kindly refer to this to assign them manually for updating from the cache server. 

Hi

Shweta said:

Hi ecompo 

Unfortunately, there is no option available for installation from an update cache for Linux computers. Internet connectivity is required for initial installation. The installer will automatically check connectivity to any update caches set up in your Central account and install from them if appropriate. Linux computers can use relay or cache for updating(provided Linux distributions are supported by Sophos Anti-Virus for Linux). Kindly refer to this to assign them manually for updating from the cache server. 

 

So given those environments where Linux systems have no internet connectivity would be impossible to install Sophos Central for linux?

It's not uncommon to see an environment that contains a mix of Windows and Linux servers and has no internet connectivity but according to your answer only Windows can successfully install Sophos Central from an existing cache server. 

I know this would be a deal breaker for some of the prospective customers.

Hi all,

A few corrections for this thread:

We do support Update Cache and Message Relay for Linux Servers, it works slightly differently than for Windows and Mac. 

The installer that you download for Linux includes details of the Update Cache/Message Relay servers that are setup at the time you download the installer. You can then run the installer, it will assess if an available Update Cache or Message Relay can be used. You cannot pass command line options, and they are not needed.

Note the supported platforms here: https://community.sophos.com/kb/en-us/122577#What%20are%20the%20prerequisites%20for%20an%20Update%20Cache?

Please let me know if you have any more questions.

Regards,

Stephen

StephenMcKay said:

Hi all,

A few corrections for this thread:

We do support Update Cache and Message Relay for Linux Servers, it works slightly differently than for Windows and Mac. 

The installer that you download for Linux includes details of the Update Cache/Message Relay servers that are setup at the time you download the installer. You can then run the installer, it will assess if an available Update Cache or Message Relay can be used. You cannot pass command line options, and they are not needed.

Note the supported platforms here: https://community.sophos.com/kb/en-us/122577#What%20are%20the%20prerequisites%20for%20an%20Update%20Cache?

Please let me know if you have any more questions.

Regards,

Stephen

 

For those late to the thread, in order to ensure successful installation for linux boxes that don't have internet connectivity, make sure to use the install script that's downloaded after Message Relay has been enabled.

Hello,

I followed the steps like you mentioned and after setting up the Cache and Message Relay server i downloaded the linux script and ran it. It is able to identify the Cache and Message Relay fine but afterwards it tries to Download the "Medium Installer" and for that it is contacting Sophos Central via the Relay and it is failing

Downloading medium installer
Checking we can connect to Sophos Central (at mcs-cloudstation-us-east-2.prod.hydra.sophos.com/.../ep via wsisblinuxavc01:8190)...
Failed to connect to Sophos Central at mcs-cloudstation-us-east-2.prod.hydra.sophos.com/.../ep (cURL error is [Couldn't resolve proxy name]). Please check your firewall rules.

Now my Cache/Relay server uses HTTP Proxy to access the internet via browser. Will this setup work in this scenario?

I checked the message relay file httpd and runnin_httpd and they have proxy address entered.

Can you guide as to what is the issue here?

Hello,

Please can you advise, did you download the installer or copy and run the script?

Regards,

Stephen

Hello Stephen,

I did download the package after setting up Cache and Relay. I was however able to resolve the issue. It was a dns resolution problem. My Cache/ Delay server was not part of the domain so there was no DNS entry and the Linux install script had the Hostname of the Cache/Relay server added so i manually edited the host file of my Linux machine and everything went smoothly.

Thanks you again for your earlier post which covered everything to the point.

Thank you for the follow up. The clients receive the hostnames of the configured Cache/Relay servers and resolve them to their IP; hence your issue. When the client couldn't resolve the hostname to an IP it was falling back to use Sophos directly.  

Glad it is now working.

Regards,

Stephen

Thank you for the follow up. The clients receive the hostnames of the configured Cache/Relay servers and resolve them to their IP; hence your issue. When the client couldn't resolve the hostname to an IP it was falling back to use Sophos directly.  

Glad it is now working.

Regards,

Stephen