Error: 504 or Load Failed connecting to your ERP

Modified on Tue, 05 Sep 2023 at 10:37 PM

Applies to:

  • Velixo NX
  • Every ERP


Overview

While configuring a connection to your ERP, the Velixo NX Connection Manager displays either a 504 message:

 

or a Load Failed message:

 

 

 

Important site accessibility & firewall considerations

Modern Excel add-ins cannot make a direct connection to your ERP system due to the browser engine restrictions for cross-origin requests.  In Excel for Mac and Excel Desktop for Windows, MS Office utilizes a Safari or Edge-based browser engine behind the scenes.

 

Therefore, Velixo NX uses a secure proxy server to facilitate the connection to your ERP system.   The proxy never caches or stores your ERP data, it is used solely for authentication and request pass-through. 

 

However, the fact that such a proxy server exists has two important implications:

  • Any ERP site that you connect to must be accessible over the public internet, with no VPN requirement

  • If your ERP host uses a firewall, it is important to allow-list not just your end users' IP addresses, but also those of Velixo NX's proxy servers



IP ranges and addresses for allow-listing:

173.245.48.0/20
103.21.244.0/22
103.22.200.0/22
103.31.4.0/22
141.101.64.0/18
108.162.192.0/18
190.93.240.0/20
188.114.96.0/20
197.234.240.0/22
198.41.128.0/17
162.158.0.0/15
104.16.0.0/13
104.24.0.0/14
172.64.0.0/13
131.0.72.0/22

35.183.61.34
13.239.34.44

 


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