Define new sets and vars for input connections.

This commit is contained in:
Jeremy Gardais 2017-08-09 17:14:26 +02:00
parent 4beb9019de
commit b831267b8e
3 changed files with 39 additions and 11 deletions

View File

@ -4,9 +4,10 @@
### Features
* Manage nftables service at startup.
* Rollback to inet family to manage both ipv4 and ipv6.
* To allow multiple ports/range ports, it's possible to redifine vars or add a rule in a dict.
### Default Rules
* Use more sets and vars definitions to avoid multiple rules.
* Use more sets and vars definitions for input/output to avoid multiple rules.
* Allow outgoing icmp.
* Remove DHCP incoming packets. The connection is started by the host, don't need incoming rule.

View File

@ -79,8 +79,10 @@ nft_input_default_rules:
- ip daddr @blackhole counter drop
015 localhost:
- iif lo accept
220 ssh:
- tcp dport ssh ct state new counter accept
200 input udp accepted:
- udp dport @input_udp_accept ct state new accept
210 input tcp accepted:
- tcp dport @input_tcp_accept ct state new accept
nft_input_group_rules: {}
nft_input_host_rules: {}
@ -106,12 +108,18 @@ nft_define_default:
desc: 'broadcast and multicast'
name: badcast_addr
value: '{ 255.255.255.255, 224.0.0.1, 224.0.0.251 }'
output udp accepted:
name: output_udp_accept
value: '{ domain, bootps, ntp }'
input tcp accepted:
name: input_tcp_accept
value: '{ ssh }'
input udp accepted:
name: input_udp_accept
value: 'none'
output tcp accepted:
name: output_tcp_accept
value: '{ http, https }'
output udp accepted:
name: output_udp_accept
value: '{ bootps, domain, ntp }'
nft_define_group: {}
nft_define_host: {}
@ -120,12 +128,17 @@ nft_set_default:
blackhole:
- type ipv4_addr;
- elements = $badcast_addr
output_udp_accept:
input_tcp_accept:
- type inet_service; flags interval;
- elements = $input_tcp_accept
input_udp_accept:
- type inet_service; flags interval;
- elements = $output_udp_accept
output_tcp_accept:
- type inet_service; flags interval;
- elements = $output_tcp_accept
output_udp_accept:
- type inet_service; flags interval;
- elements = $output_udp_accept
nft_set_group: {}
nft_set_host: {}
```
@ -183,7 +196,8 @@ table inet firewall {
jump global
ip daddr @blackhole counter packets 0 bytes 0 drop
iif "lo" accept
tcp dport ssh ct state new counter packets 0 bytes 0 accept
udp dport @input_udp_accept ct state new accept
tcp dport @input_tcp_accept ct state new accept
}
chain output {

View File

@ -34,8 +34,10 @@ nft_input_default_rules:
- ip daddr @blackhole counter drop
015 localhost:
- iif lo accept
220 ssh:
- tcp dport ssh ct state new counter accept
200 input udp accepted:
- udp dport @input_udp_accept ct state new accept
210 input tcp accepted:
- tcp dport @input_tcp_accept ct state new accept
nft_input_group_rules: {}
nft_input_host_rules: {}
@ -61,6 +63,12 @@ nft_define_default:
desc: 'broadcast and multicast'
name: badcast_addr
value: '{ 255.255.255.255, 224.0.0.1, 224.0.0.251 }'
input tcp accepted:
name: input_tcp_accept
value: '{ ssh }'
input udp accepted:
name: input_udp_accept
value: 'none'
output tcp accepted:
name: output_tcp_accept
value: '{ http, https }'
@ -75,6 +83,11 @@ nft_set_default:
blackhole:
- type ipv4_addr;
- elements = $badcast_addr
input_tcp_accept:
- type inet_service; flags interval;
- elements = $input_tcp_accept
input_udp_accept:
- type inet_service; flags interval;
output_tcp_accept:
- type inet_service; flags interval;
- elements = $output_tcp_accept