Do ports randomise deliberately for security reasons?
Hi guys
As part of the last question I asked about firewall rules, I am looking at our firewall right now and monitoring the traffic. I'm looking at the traffic between VPN connections from our stores to a main server. These stores are all using the same application to communicate with the server. However, I'm looking at the server and it is receiving connections from our various stores, but every single store is communicating via a different port. So one store will be coming through port 4274. The other one will send it via port 4288. My point is, are applications specifically written in this way to prevent security breaches from happening by constantly randomising their port sequences so that they can't be 'guessed' by a malicious attacker?
And if that is the case, surely going back to the answers being given previously, this does warrant the ability for the 'ANY' ports to be open from site A to site B via VPN.
Thank you
Yash
As part of the last question I asked about firewall rules, I am looking at our firewall right now and monitoring the traffic. I'm looking at the traffic between VPN connections from our stores to a main server. These stores are all using the same application to communicate with the server. However, I'm looking at the server and it is receiving connections from our various stores, but every single store is communicating via a different port. So one store will be coming through port 4274. The other one will send it via port 4288. My point is, are applications specifically written in this way to prevent security breaches from happening by constantly randomising their port sequences so that they can't be 'guessed' by a malicious attacker?
And if that is the case, surely going back to the answers being given previously, this does warrant the ability for the 'ANY' ports to be open from site A to site B via VPN.
Thank you
Yash
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Giovanni
Are you referring to source ports or destination ports?
VPN
A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.
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