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| author | Daniil Baturin <daniil@vyos.io> | 2024-10-10 16:16:51 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-10-10 16:16:51 +0100 |
| commit | f335bd75474b8e355ea86ceff5550dd39a32064b (patch) | |
| tree | 9b07f688f0e55659c1723153fedc09905c897272 /docs/configuration/firewall/ipv4.rst | |
| parent | e1f61e448be5422303c5aa80fd4c4d0a35209e3c (diff) | |
| parent | 177ba9dd0d8a9eacd5ca5e022a68a1aa6170c3fa (diff) | |
| download | vyos-documentation-f335bd75474b8e355ea86ceff5550dd39a32064b.tar.gz vyos-documentation-f335bd75474b8e355ea86ceff5550dd39a32064b.zip | |
Merge pull request #1559 from nicolas-fort/firewall-packet-modifications
T6760: add docs for new commands available in firewall: packet modifications
Diffstat (limited to 'docs/configuration/firewall/ipv4.rst')
| -rw-r--r-- | docs/configuration/firewall/ipv4.rst | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/docs/configuration/firewall/ipv4.rst b/docs/configuration/firewall/ipv4.rst index abae31a5..419a9339 100644 --- a/docs/configuration/firewall/ipv4.rst +++ b/docs/configuration/firewall/ipv4.rst @@ -980,6 +980,56 @@ geoip) to keep database and rules updated. Match when 'count' amount of connections are seen within 'time'. These matching criteria can be used to block brute-force attempts. +Packet Modifications +==================== + +Starting from **VyOS-1.5-rolling-202410060007**, the firewall can modify +packets before they are sent out. This feaure provides more flexibility in +packet handling. + +.. cfgcmd:: set firewall ipv4 prerouting raw rule <1-999999> + set dscp <0-63> +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + set dscp <0-63> +.. cfgcmd:: set firewall ipv4 output [filter | raw] rule <1-999999> + set dscp <0-63> + + Set a specific value of Differentiated Services Codepoint (DSCP). + +.. cfgcmd:: set firewall ipv4 prerouting raw rule <1-999999> + set mark <1-2147483647> +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + set mark <1-2147483647> +.. cfgcmd:: set firewall ipv4 output [filter | raw] rule <1-999999> + set mark <1-2147483647> + + Set a specific packet mark value. + +.. cfgcmd:: set firewall ipv4 prerouting raw rule <1-999999> + set tcp-mss <500-1460> +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + set tcp-mss <500-1460> +.. cfgcmd:: set firewall ipv4 output [filter | raw] rule <1-999999> + set tcp-mss <500-1460> + + Set the TCP-MSS (TCP maximum segment size) for the connection. + +.. cfgcmd:: set firewall ipv4 prerouting raw rule <1-999999> + set ttl <0-255> +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + set ttl <0-255> +.. cfgcmd:: set firewall ipv4 output [filter | raw] rule <1-999999> + set ttl <0-255> + + Set the TTL (Time to Live) value. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + set connection-mark <0-2147483647> +.. cfgcmd:: set firewall ipv4 output [filter | raw] rule <1-999999> + set connection-mark <0-2147483647> + + Set connection mark value. + ******** Synproxy ******** |