#ban

8 one-liners with this tag.

Add an IP address to an nftables blocklist

#nft add element inet filter blocklist '{ 203.0.113.25 }'

cautionFirewall

Ban an IP address manually in CrowdSec

#cscli decisions add --ip 203.0.113.25 --duration 24h --reason 'manual ban'

cautionFirewall

Block a single IP address immediately with iptables

#iptables -I INPUT -s 203.0.113.25 -j DROP

cautionSecurity

Block an IP address or subnet with ufw

#ufw insert 1 deny from 203.0.113.0/24

cautionFirewall

Create an IP blocklist set in nftables

#nft add set inet filter blocklist '{ type ipv4_addr; flags interval; }' && nft insert rule inet filter input ip saddr @blocklist drop

cautionFirewall

Show active CrowdSec decisions and bans

#cscli decisions list

harmlessFirewall

Show the status of a Fail2Ban jail and banned IPs

#fail2ban-client status sshd

harmlessSecurity

Unban an IP address in Fail2Ban

#fail2ban-client set sshd unbanip 203.0.113.25

cautionSecurity