diff options
| author | Toshi Kikuchi <toshik@google.com> | 2021-04-09 21:09:47 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-04-09 21:11:26 -0700 |
| commit | d1edabdca016b9d80295855a3ce6d2816486d65c (patch) | |
| tree | 9e9827ed0ff58ada2beab7605366d5c881404861 /pkg/tcpip/stack/iptables.go | |
| parent | ea7faa50579d3d76c6cbb1f7ffba4e16eebf1885 (diff) | |
iptables: support postrouting hook and SNAT target
The current SNAT implementation has several limitations:
- SNAT source port has to be specified. It is not optional.
- SNAT source port range is not supported.
- SNAT for UDP is a one-way translation. No response packets
are handled (because conntrack doesn't support UDP currently).
- SNAT and REDIRECT can't work on the same connection.
Fixes #5489
PiperOrigin-RevId: 367750325
Diffstat (limited to 'pkg/tcpip/stack/iptables.go')
| -rw-r--r-- | pkg/tcpip/stack/iptables.go | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/pkg/tcpip/stack/iptables.go b/pkg/tcpip/stack/iptables.go index 52890f6eb..7ea87d325 100644 --- a/pkg/tcpip/stack/iptables.go +++ b/pkg/tcpip/stack/iptables.go @@ -175,9 +175,10 @@ func DefaultTables() *IPTables { }, }, priorities: [NumHooks][]TableID{ - Prerouting: {MangleID, NATID}, - Input: {NATID, FilterID}, - Output: {MangleID, NATID, FilterID}, + Prerouting: {MangleID, NATID}, + Input: {NATID, FilterID}, + Output: {MangleID, NATID, FilterID}, + Postrouting: {MangleID, NATID}, }, connections: ConnTrack{ seed: generateRandUint32(), |