Re: Public Subnet re-assignments

2019-06-25 Thread Mel Beckman
Michel is right. This is a common configuration error: failing to have the mask agree on all interfaces. This is indeed what you would see. -mel On Jun 25, 2019, at 4:07 PM, Michel Py mailto:michel...@tsisemi.com>> wrote: > Scott wrote : > No nothing like that. I'm just removing the .0/30

RE: Public Subnet re-assignments

2019-06-25 Thread Michel Py
> Scott wrote : > No nothing like that. I'm just removing the .0/30 and 4/30 subnets and adding > .0/29. > To your previous question, yes .0 and .3 are unused. Once I change the > subnet .3 > becomes a usable IP and it's getting hammered with traffic, causing packet > loss. You change the

Re: Public Subnet re-assignments

2019-06-25 Thread Mel Beckman
If the sources are from many different IPs, it could be a DDoS attack that you simply didn’t notice before. You can black-hole individual IPs using a /32 null0 route. That will at least stop your border router from trying to ARP the destination, reducing broadcast traffic on the subnet. In

Re: Public Subnet re-assignments

2019-06-25 Thread Scott Weeks
--- sc...@viviotech.net wrote: From: Scott To your previous question, yes .0 and .3 are unused. Once I change the subnet .3 becomes a usable IP and it's getting hammered with traffic, causing packet loss. -- Is it legitimate traffic or DDoS stuff?

Re: Public Subnet re-assignments

2019-06-25 Thread Scott
No nothing like that. I'm just removing the .0/30 and 4/30 subnets and adding .0/29. To  your previous question, yes .0 and .3 are unused. Once I change the subnet .3 becomes a usable IP and it's getting hammered with traffic, causing packet loss. On 6/25/19 3:30 PM, Mel Beckman wrote: > Also,

Re: Public Subnet re-assignments

2019-06-25 Thread Mel Beckman
Also, what do you mean by “join to /30 public subnets to a /29”? You can’t overlap subnets, if that’s what you’re thinking. -mel > On Jun 25, 2019, at 3:27 PM, Mel Beckman wrote: > > You’re using just the two middle IPs in the four that make up the /30 set, > right? IOW, the subnet

Re: Public Subnet re-assignments

2019-06-25 Thread Mel Beckman
You’re using just the two middle IPs in the four that make up the /30 set, right? IOW, the subnet x.x.x.0/30 should have .0 and .3 unused (they’re broadcast), and you use .1 and .2. -mel > On Jun 25, 2019, at 9:41 AM, Scott wrote: > > First, sorry if this is a bit of a noob question. > >

Public Subnet re-assignments

2019-06-25 Thread Scott
First, sorry if this is a bit of a noob question. I'm trying to find a way of preventing a slew of traffic to an IP, or IP's, when I join two /30 public subnets to a /29. It appears that while the ranges are /30 someone is trying to brute-force the network and/or broadcast addresses for the