Bu Iran Ispsinin derdi nedir acaba?

https://bgp.he.net/AS15828#_asinfo

Loglarda yuzbinlerce satir:

2022-03-16 07:43:45 login authenticator failed for (localhost) [5.34.207.33]: 535 Incorrect authentication data (set_id=vilte@xxx.com)
2022-03-16 07:43:45 login authenticator failed for (localhost) [5.34.207.67]: 535 Incorrect authentication data (set_id=mehdi@xxx.com)
2022-03-16 07:43:45 login authenticator failed for (localhost) [5.34.207.174]: 535 Incorrect authentication data (set_id=I’ll@xxx.com)
2022-03-16 07:43:45 login authenticator failed for (localhost) [5.34.207.67]: 535 Incorrect authentication data (set_id=mehdi@xxx.com)
2022-03-16 07:43:46 login authenticator failed for (localhost) [5.34.207.33]: 535 Incorrect authentication data (set_id=mramsey@xxx.com)
2022-03-16 07:43:46 login authenticator failed for (localhost) [5.34.207.158]: 535 Incorrect authentication data (set_id=PUTRI)
2022-03-16 07:43:46 login authenticator failed for (localhost) [5.34.207.33]: 535 Incorrect authentication data (set_id=mramsey@xxx.com)
2022-03-16 07:43:47 login authenticator failed for (localhost) [5.34.207.174]: 535 Incorrect authentication data (set_id=secureftp@xxx.com)
2022-03-16 07:43:47 login authenticator failed for (localhost) [5.34.207.97]: 535 Incorrect authentication data (set_id=s59)

Bloklayip gecelim.

Tamam asagidaki sekilde:

iptables -A INPUT -s 5.34.192.0/20 -j DROP

iptables -A INPUT -s 87.246.7.0/24 -j DROP

iptables -A INPUT -s 2.57.122.0/24 -j DROP