Nftables: Unterschied zwischen den Versionen

@@ Zeile 1: / Zeile 1: @@
-=Install=
+* [[Nftabels Grundlagen]]
-*apt-get install nftables
+* [[Grundlegendes zum Connection Tracking]]
-=Create a basic IPv4 table=
+* [[nftables console]]
-*nft add table inet filter
+* [[iptables zu nftables]]
-=List that table=
+* [[nftables masquerade]]
-*nft list table inet filter
+* [[nftables Host absichern]]
- table inet filter {
+* [[nftables Netze absichern]]
- }
+* [[nftables misc]]
-=Create a chain for input traffic IPv4=
+* [[nftables Anpassung]]
-*nft add chain inet filter input { type filter hook input priority 0\; }
-=A rule to check that all is fine (IPv4)=
-*nft add rule inet filter input counter accept
-=List that table=
-*nft list table inet filter
-<pre>
-table inet filter {
-	chain input {
-		type filter hook input priority 0; policy accept;
-		counter packets 47 bytes 3100 accept
-	}
-}
-</pre>
-=Flush rules in chain filter/input=
-*nft flush chain inet filter input
-=Delete the chain filter/input=
-*nft delete chain inet filter input
-=Delete the table filter=
-*nft delete table inet filter
-=Example Script=
-<pre>
-#!/usr/sbin/nft -f
-#variable declaration
-define tcp_lan_input_ports = { 8472, 53 }
-define tcp_all_input_ports = { 80, 443 }
-define udp_lan_input_ports = { 53 }
-define tcp_for_input_ports = { 53 }
-define udp_for_input_ports = {  53 }
-# table declaration
-add table filter
-add table nat
-flush chain filter input
-flush chain filter output
-flush chain filter forward
-table filter {
-        chain input {
-                type filter hook input priority 0; policy drop;
-                ct state established,related counter packets 97 bytes 6640 accept
-                iifname "lo" counter accept
-                iifname "ens19" tcp dport $tcp_lan_input_ports counter accept
-                tcp dport $tcp_all_input_ports  counter accept
-                udp dport $udp_lan_input_ports  counter accept
-                log prefix "nft-input "
-        }
-        chain output {
-                type filter hook output priority 0; policy drop;
-                ct state established,related counter accept
-                counter accept
-                log prefix "nft-output "
-        }
-        chain forward {
-                type filter hook forward priority 0; policy drop;
-                ct state established,related counter accept
-                iifname "ens19" oifname "ens19" counter accept
-                iifname "ens19" oifname "ens18" tcp dport $tcp_for_input_ports counter accept
-                iifname "ens19" oifname "ens18" udp dport $udp_for_input_ports counter accept
-                iifname "ens19" oifname "ens18" icmp type echo-request counter accept
-                log prefix "nft-forward "
-        }
-}
-</pre>

Nftables: Unterschied zwischen den Versionen

Aktuelle Version vom 7. März 2023, 08:35 Uhr

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