Florian Westphal a82c25c366 Revert "netfilter: nat: force port remap to prevent shadowing well-known ports" ... This reverts commit 878aed8db3. This change breaks existing setups where conntrack is used with asymmetric paths. In these cases, the NAT transformation occurs on the syn-ack instead of the syn: 1. SYN x:12345 -> y -> 443 // sent by initiator, receiverd by responder 2. SYNACK y:443 -> x:12345 // First packet seen by conntrack, as sent by responder 3. tuple_force_port_remap() gets called, sees: 'tcp from 443 to port 12345 NAT' -> pick a new source port, inititor receives 4. SYNACK y:$RANDOM -> x:12345 // connection is never established While its possible to avoid the breakage with NOTRACK rules, a kernel update should not break working setups. An alternative to the revert is to augment conntrack to tag mid-stream connections plus more code in the nat core to skip NAT for such connections, however, this leads to more interaction/integration between conntrack and NAT. Therefore, revert, users will need to add explicit nat rules to avoid port shadowing. Link: https://lore.kernel.org/netfilter-devel/20220302105908.GA5852@breakpoint.cc/#R Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2051413 Signed-off-by: Florian Westphal <fw@strlen.de>		2022-03-08 13:52:11 +01:00
..
accounting	delayacct: track delays from memory compact	2022-01-20 08:52:55 +02:00
arch	tools headers cpufeatures: Sync with the kernel sources	2022-02-01 12:21:47 -03:00
bootconfig
bpf	Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2022-02-03 13:42:38 -08:00
build	Merge remote-tracking branch 'torvalds/master' into perf/core	2022-01-13 10:20:59 -03:00
cgroup	tools/cgroup/slabinfo: update to work with struct slab	2022-02-21 11:34:49 +01:00
counter
debugging
edid
firewire
firmware
gpio
hv
iio
include	tools headers UAPI: Sync linux/perf_event.h with the kernel sources	2022-02-16 13:49:24 -03:00
io_uring
kvm/kvm_stat
laptop
leds
lib	libsubcmd: Fix use-after-free for realloc(..., 0)	2022-02-16 13:49:25 -03:00
memory-model
objtool	objtool: Fix truncated string warning	2022-01-24 10:09:06 -08:00
pci
pcmcia
perf	perf bpf: Defer freeing string after possible strlen() on it	2022-02-17 07:15:09 -03:00
power	More ACPI updates for 5.17-rc1	2022-01-18 08:51:51 +02:00
rcu
scripts	tools: Ignore errors from `which' when searching a GCC toolchain	2022-02-01 23:04:12 +01:00
spi
testing	Revert "netfilter: nat: force port remap to prevent shadowing well-known ports"	2022-03-08 13:52:11 +01:00
thermal/tmon
time
tracing	rtla: Fix segmentation fault when failing to enable -t	2022-02-08 11:23:09 -05:00
usb
virtio
vm
wmi
Makefile