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firewall, nat, nat66
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The following commands will enable nftables flowtable offload on interfaces eth0 eth1:
```
set firewall global-options flow-offload software interface <name>
set firewall global-options flow-offload hardware interface <name>
```
Generated nftables rules:
```
table inet vyos_offload {
flowtable VYOS_FLOWTABLE_software {
hook ingress priority filter - 1; devices = { eth0, eth1, eth2, eth3 };
counter
}
chain VYOS_OFFLOAD_software {
type filter hook forward priority filter - 1; policy accept;
ct state { established, related } meta l4proto { tcp, udp } flow add @VYOS_FLOWTABLE_software
}
}
```
Use this option to count packets and bytes for each offloaded flow:
```
set system conntrack flow-accounting
```
To verify a connection is offloaded, run
```
cat /proc/net/nf_conntrack|grep OFFLOAD
```
This PR follows firewalld's implementation: https://github.com/firewalld/firewalld/blob/e748b97787d685d0ca93f58e8d4292e87d3f0da6/src/firewall/core/nftables.py#L590
A good introduction to nftables flowtable: https://thermalcircle.de/doku.php?id=blog:linux:flowtables_1_a_netfilter_nftables_fastpath
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firewall: T3509: Add support for IPv6 reverse path filtering
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interface-name or interface-group
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firewall ipv6 name ...> . Also fix some unexpected behaviour with geoip.
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scripts and src firewall
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* T5195: move run, cmd, call, rc_cmd helper to vyos.utils.process
* T5195: use read_file and write_file implementation from vyos.utils.file
Changed code automatically using:
find . -type f -not -path '*/\.*' -exec sed -i 's/^from vyos.util import read_file$/from vyos.utils.file import read_file/g' {} +
find . -type f -not -path '*/\.*' -exec sed -i 's/^from vyos.util import write_file$/from vyos.utils.file import write_file/g' {} +
* T5195: move chmod* helpers to vyos.utils.permission
* T5195: use colon_separated_to_dict from vyos.utils.dict
* T5195: move is_systemd_service_* to vyos.utils.process
* T5195: fix boot issues with missing imports
* T5195: move dict_search_* helpers to vyos.utils.dict
* T5195: move network helpers to vyos.utils.network
* T5195: move commit_* helpers to vyos.utils.commit
* T5195: move user I/O helpers to vyos.utils.io
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We cannot use both 'port' and 'port-group' for the same direction
in one rule at the same time
Otherwise it generates wrong rules that don't block anything
set P_pgrp {
type inet_service
flags interval
auto-merge
elements = { 101-105 }
}
chain NAME_foo {
tcp dport 22 tcp dport @P_pgrp counter drop comment "foo-10"
counter return comment "foo default-action accept"
}
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T4780: Firewall: add firewall groups in firewall. Extend matching cri…
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firewall: T478: Fix firewall group circular dependency check
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so this new group can be used in inbound and outbound matcher
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`fqdn` node
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firewall node
* Refactor firewall and zone-policy rule creation and cleanup
* Migrate interface firewall values to `firewall interfaces <name> <direction> name/ipv6-name <name>`
* Remove `firewall-interface.py` conf script
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This extends the implementation of commit 0cc7e0a49094 ("firewall: T4655: Fix
default action 'drop' for the firewall") in a way that we can now also use the
XML <defaultValue> node under "firewall name" and "firewall ipv6-name". This
is a much cleaner approach which also adds the default value automatically to
the CLIs completion helper ("?").
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* Refactor nftables clean-up code
* Adds policy route test for using firewall groups
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firewall: T478: Add support for nesting groups
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It can be more then 5 symbols in top-level-domain address
for example '.photography' and '.accountants'
Firewall group can be added without address:
* set firewall group domain-group DOMAIN
Check if 'address' exists in group_config
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Domain group allows to filter addresses by domain main
Resolved addresses as elements are stored to named "nft set"
that used in the nftables rules
Also added a dynamic "resolver" systemd daemon
vyos-domain-group-resolve.service which starts python script
for the domain-group addresses resolving by timeout 300 sec
set firewall group domain-group DOMAINS address 'example.com'
set firewall group domain-group DOMAINS address 'example.org'
set firewall name FOO rule 10 action 'drop'
set firewall name FOO rule 10 source group domain-group 'DOMAINS'
set interfaces ethernet eth0 firewall local name 'FOO'
nft list table ip filter
table ip filter {
set DOMAINS {
type ipv4_addr
flags interval
elements = { 192.0.2.1, 192.0.2.85,
203.0.113.55, 203.0.113.58 }
}
chain NAME_FOO {
ip saddr @DOMAINS counter packets 0 bytes 0 drop comment "FOO-10"
counter packets 0 bytes 0 return comment "FOO default-action accept"
}
}
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* Add support for ECN and CWR flags
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