2821 ACL for the range of IP addresses
We use an old Cisco 2821 on the edge of the internet for the initial incoming traffic filtering. To try to block some networks of suppliers that are a source of SPAM, we have tried to apply an ACL that included a range of addresses as follows:
access-list 110 deny host ip 198.20.160.0 0.0.31.255 255.255.255.255
This command has been shorted to what follows in the running configuration:
access-list 110 deny host ip 198.20.160.0 all
The ACL doesn't seem to work, as we have always received spam through on this range.
Any help is greatly appreciated.
Thank you for your time.
Hello
Your syntax ACL deny only the host 192.20.160.0.
If you look below
access-list 110 deny ip host 198.20.160.0 0.0.31.255 255.255.255.255
You have the source specified as host (198.20.160.0 host)
destination like any other host (network mask and subnet inalid - 0.0.31.255 255.255.255.255)
You want to block what subnet or network, gave me a source and destination subnet? . Will be recorrect the ACL
HTH
Sandy
Tags: Cisco Network
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