Network rules and security settings can influence ping performance.
Network rules and security settings can influence ping performance.
I've organized a smart-home setup with a Netgear CM500 modem, Edgemax-X router, and additional Unifi access points. After familiarizing myself with the interface and setting up firewall rules, I'm facing internet problems. It seems the firewall isn't the issue since connections work fine for all networks. The settings appear standard, but ISP speeds are slow—around 230mbps download and 7mbps upload. Ping times range from 6 to 3800ms, which is problematic for calls or streaming. Basic browsing is slow too. I've tried various fixes: enabling hardware offloading, ensuring wired connections are CAT6-1000, isolating devices, and resetting the router. Still, ping stays over 500ms regularly. It feels like throttling is happening, especially with many users online. I'm wondering if a DoS attack might be the cause and need guidance on how to investigate further.
Run a trace route to a DNS server like Google's and observe the ping across each hop. This may indicate an issue beyond your local network.
We have all public IP addresses available. What we actually require is a traceroute from a private IP to a public IP, allowing us to observe each connection point through the PC, router, firewall, and modem. On Windows, this can be accomplished by entering "tracert IP" in the command line. It’s unclear how to perform this in Linux. Alternatively, you can test individual IP addresses within your network and check the ping results. In this approach, try reaching out to all devices between your PC and the internet—such as routers, firewalls, modems, and access points.
I'm working on a Mac and can utilize the built-in network tools.
I've experienced this a few times, and it returns to normal (under 30ms latency) for roughly an hour before resuming. I acknowledge the modem heats up when not in an air-conditioned space, but with an IR camera I can confirm it never exceeds 45°C. I've also verified the modem is running the latest firmware, after confirming with my ISP over the phone to update it.