Solutions

Opening Firewall Ports Best Practice

Modified on 2025-06-10 12:58:25 +0200

We have typically taken the most restrictive approach with opening ports in our firewall to PRTG. We only allow known IPs of remote probes to connect, but this causes issues with cellular backup or other connections that aren't static.

I can't find a best practice from Paessler on this? Are we correct to restrict access as much as possible or is there little concern in opening 23560 to the world?

Article Comments

Attention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.

Hi Schester,

I think a restrictive approach is a good one. You will find a list of all external servers and also ports, PRTG is using in different situations; here:

PRTG Connections to External Servers
PRTG Port Usage

I hope this helps.

Kind regards
Andreas Günther, Technical Support

Apr, 2018 - Permalink

Disclaimer:
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.

Opening Firewall Ports Best Practice

Article CommentsAttention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.

Search

Attention

Related Articles

Article Comments

Attention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.