Invalid IP Range to Add

[JasonS]

Hello,

I have been adding "Psychz Networks" IP blocks because they are habitual spammers. I have been adding their IP blocks as they appear in the "Rate Limiter" and in my junk mail folder, this network is a serious problem and I have reported them several times.

Anyways I have I block that I cannot add, can you please tell me why it keeps throwing "Invalid IP Range to Add" for the range of 45.34.0.0 - 45.35.255.255? I have blocked a lot of their other blocks but this one will not, I am guessing it has something to do with the second octet in the first and second IPs in the range.

Thanks again for your help,
Jason

[magicspam]

Hello JasonS,

The MagicSpam Sender IP Blacklist only accepts /16 ranges, so you will have to add two separate entries to block their network (45.34.0.0 - 45.35.255.255).

Code: Select all

45.34.0.0 - 45.34.255.255
45.35.0.0 - 45.35.255.255

Hopefully this information will be helpful to you.

Thanks.

[JasonS]

Hello MagicSpam,

Why only block the /16 range and not up to /32? I have come across some networks (Psychz Networks) the entire netblock is listed as "Critical" on Talos and it is just easier to get them all with a /32.

I can do the work around you stated, that just doubles up my entries for 1 netblock and I would imagine that would cause more of a load on the filter the longer the list got.

Here is what I am working with:
Network: Psychz Networks
IPs: https://bgp.he.net/AS40676#_prefixes

[magicspam]

Hey JasonS,

Just to make sure that we are on the same page -- a /32 refers to an individual IP address, so you are probably asking about blocking a network larger than a /16 range (e.g. /15 range). In that case, MagicSpam had historically only supported blocking up to /16 ranges as a tradeoff between safety and efficiency -- as we have had users unintentionally blocking networks and negatively impacting their inbound email delivery in the past.

In your case, you will have to continue adding multiple /16 ranges. However, don't worry too much as doubling a /15 range into two /16 ranges will have a negligible effect on performance -- unless you find yourself with many thousands of entries, the blacklist and whitelist checks should never cause any performance issues.

Hopefully this information will be helpful to you.

Thanks.