Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Firewall - use iifgroup instead of iif == #1412

Open
wants to merge 1 commit into
base: main
Choose a base branch
from
Open

Firewall - use iifgroup instead of iif == #1412

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
20 changes: 10 additions & 10 deletions user/security-in-qubes/firewall.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -297,13 +297,13 @@ nft add chain qubes custom-dnat-qubeDEST '{ type nat hook prerouting priority fi
Second step, code a natting firewall rule to route traffic on the outside interface for the service to the sys-firewall VM

```
nft add rule qubes custom-dnat-qubeDEST iif == "ens6" ip saddr 192.168.x.y/24 tcp dport 443 ct state new,established,related counter dnat 10.137.1.z
nft add rule qubes custom-dnat-qubeDEST iifgroup 1 ip saddr 192.168.x.y/24 tcp dport 443 ct state new,established,related counter dnat 10.137.1.z
```

Third step, code the appropriate new filtering firewall rule to allow new connections for the service

```
nft add rule qubes custom-forward iif == "ens6" ip saddr 192.168.x.y/24 ip daddr 10.137.1.z tcp dport 443 ct state new,established,related counter accept
nft add rule qubes custom-forward iifgroup 1 ip saddr 192.168.x.y/24 ip daddr 10.137.1.z tcp dport 443 ct state new,established,related counter accept
```

> Note: If you do not wish to limit the IP addresses connecting to the service, remove `ip saddr 192.168.x.y/24` from the rules
Expand All @@ -320,12 +320,12 @@ In this example, we can see 7 packets in the forward rule, and 3 packets in the

```
chain custom-forward {
iif "ens6" ip saddr 192.168.x.y/24 ip daddr 10.137.1.z tcp dport 443 ct state new,established,related counter packets 7 bytes 448 accept
iifgroup 1 ip saddr 192.168.x.y/24 ip daddr 10.137.1.z tcp dport 443 ct state new,established,related counter packets 7 bytes 448 accept
}

chain custom-dnat-qubeDEST {
type nat hook prerouting priority filter + 1; policy accept;
iif "ens6" ip saddr 192.168.x.y/24 tcp dport 443 ct state new,established,related counter packets 3 bytes 192 dnat to 10.138.33.59
iifgroup 1 ip saddr 192.168.x.y/24 tcp dport 443 ct state new,established,related counter packets 3 bytes 192 dnat to 10.138.33.59
}
```

Expand All @@ -351,10 +351,10 @@ Content of `/rw/config/qubes-firewall-user-script` in `sys-net`:
if nft add chain qubes custom-dnat-qubeDEST '{ type nat hook prerouting priority filter +1 ; policy accept; }'
then
# create the dnat rule
nft add rule qubes custom-dnat-qubeDEST iif == "ens6" saddr 192.168.x.y/24 tcp dport 443 ct state new,established,related counter dnat 10.137.1.z
nft add rule qubes custom-dnat-qubeDEST iifgroup 1 saddr 192.168.x.y/24 tcp dport 443 ct state new,established,related counter dnat 10.137.1.z

# allow forwarded traffic
nft add rule qubes custom-forward iif == "ens6" ip saddr 192.168.x.y/24 ip daddr 10.137.1.z tcp dport 443 ct state new,established,related counter accept
nft add rule qubes custom-forward iifgroup 1 ip saddr 192.168.x.y/24 ip daddr 10.137.1.z tcp dport 443 ct state new,established,related counter accept
fi
~~~

Expand All @@ -371,13 +371,13 @@ nft add chain qubes custom-dnat-qubeDEST '{ type nat hook prerouting priority fi
Second step, code a natting firewall rule to route traffic on the outside interface for the service to the destination qube

```
nft add rule qubes custom-dnat-qubeDEST iif == "eth0" ip saddr 192.168.x.y/24 tcp dport 443 ct state new,established,related counter dnat 10.137.0.xx
nft add rule qubes custom-dnat-qubeDEST iifgroup 1 ip saddr 192.168.x.y/24 tcp dport 443 ct state new,established,related counter dnat 10.137.0.xx
```

Third step, code the appropriate new filtering firewall rule to allow new connections for the service

```
nft add rule qubes custom-forward iif == "eth0" ip saddr 192.168.x.y/24 ip daddr 10.137.0.xx tcp dport 443 ct state new,established,related counter accept
nft add rule qubes custom-forward iifgroup 1 ip saddr 192.168.x.y/24 ip daddr 10.137.0.xx tcp dport 443 ct state new,established,related counter accept
```

> Note: If you do not wish to limit the IP addresses connecting to the service, remove `ip saddr 192.168.x.y/24` from the rules
Expand All @@ -398,10 +398,10 @@ Content of `/rw/config/qubes-firewall-user-script` in `sys-firewall`:
if nft add chain qubes custom-dnat-qubeDEST '{ type nat hook prerouting priority filter +1 ; policy accept; }'
then
# create the dnat rule
nft add rule qubes custom-dnat-qubeDEST iif == "eth0" tcp dport 443 ct state new,established,related counter dnat 10.137.0.xx
nft add rule qubes custom-dnat-qubeDEST iifgroup 1 tcp dport 443 ct state new,established,related counter dnat 10.137.0.xx

# allow forwarded traffic
nft add rule qubes custom-forward iif == "eth0" ip saddr 192.168.x.y/24 ip daddr 10.137.0.xx tcp dport 443 ct state new,established,related counter accept
nft add rule qubes custom-forward iifgroup 1 ip saddr 192.168.x.y/24 ip daddr 10.137.0.xx tcp dport 443 ct state new,established,related counter accept
fi
~~~

Expand Down