So, I’ve been having problems connecting to a certain Usenet server, I keep getting the error:
“Login from too many different IP addresses to server news.tw***** [502 (max number of simultaneous IP addresses reached: 2)]”. I can’t get over 2 connections to this server.
The odd thing is, when I click Settings > Wi-Fi & Internet > Firewall I see the error displayed in the screenshot, which is naturally odd. One one occasion I rebooted, went to Firewall settings, and everything was displayed correctly (firewall was disabled) - When things were displayed correctly, I could obtain up to 10 connections to the same Usenet server (previously I couldn’t get over 2 connections).
I don’t know whether the two problems are related, but has anyone else experienced this error under their Firewall settings? Running KDE Neon 6.1.1.
The two issues are completely umrelated - one is clearly a bug in the UI while the other seems to be a networking setup with your service provider (see speculation below).
the networking problem seems to be a restriction of your usenet provider that won’t allow multiple simultaneous connections to the same account from multiple IP addresses. It can be viewed as a security feature or as an anti-password-sharing feature. So why does the server thinks you are using multiple addresses when you sit in front of a single computer? The most likely explanation is that your ISP doesn’t give you a direct connection to the internet and instead tries to save on expensive residential IPv4 addresses and has you behind a carrier grade NAT. This is similar to a residential NAT except that all customers are behind a single NAT that sits in the ISP’s data center and because it has so many customers it needs to spread connections across more than one IP address - every time you open a new connection, the CGNAT server assigns a random IP address from its pool as the “source address” of the connection - the server than sees you connecting from your home but every connection comes from a different IP address in the same block. It is easy to test if you go to a “What is my IP address” service and reload the page a few times - if the IP address shown changes between reloads - you are behind a CGNAT address pool.
I managed to resolve the SABnzbd problem. The fix was to tick the check box under SABnzbd+ Settings > Special > “IPv6 Staging”. I’ve checked that box, with absolutely no help from the support desk of the Usenet provider in question as they were quite useless, and now I get 30 connections rock stable and the maximum 50Mbps download speed.
I’m glad you could reproduce the UI issue under Plasma Settings, at least I know it’s not something I’ve done at my end.
