internet slowness issue / possible firewall issue
Posted on 2013-12-17
Hi - We have a Sonicwall TZ-100, and we've been having an issue where our internet connection frequently comes to a screeching halt. Our download speeds are typically 56/d and 15/up, but when it slows, it goes to 2.5/d and 0/up. We know its one of 2 things, either our firewall is being pounded by something from the outside, or our ISP is having issues. When we call the ISP, they tell me they're seeing latency / packet loss around 38%. Also, if I restart the firewall, it clears up for a little while, so its hard to tell where its coming from. Could the latency/packet loss be due to something flooding the firewall/therefore network traffic, and this is what the ISP is seeing? If I check the log files on the firewall, nothing is really screaming out telling me there are any type of intrusion attempts. Another question, are there any tools other than depending on firewall log files that will tell me whats going on? Any help with this would be appreciated.