If our servers connected from Juniper ge-1/1/5 unit 0 and 47.74.19.98/32 is spam source-ip, then can reject/block/deny this from Juniper-Router as bellow

## Create filter rules

set firewall family inet filter spammer-ip term 32 from source-address 47.74.19.98/32

set firewall family inet filter spammer-ip term 32 then reject

set firewall family inet filter spammer-ip term 33 then accept

## Apply to interface

set interfaces ge-1/1/5 unit 0 family inet filter output spammer-ip