Revision a82c25c366b0963d33ddf699196e6cf57f6d89b1 authored by Florian Westphal on 08 March 2022, 12:52:11 UTC, committed by Florian Westphal on 08 March 2022, 12:52:11 UTC
This reverts commit 878aed8db324bec64f3c3f956e64d5ae7375a5de. 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>
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index.rst | -rw-r--r-- | 367 bytes |
leds-blinkm.rst | -rw-r--r-- | 2.0 KB |
leds-class-flash.rst | -rw-r--r-- | 3.2 KB |
leds-class-multicolor.rst | -rw-r--r-- | 3.0 KB |
leds-class.rst | -rw-r--r-- | 7.2 KB |
leds-el15203000.rst | -rw-r--r-- | 4.3 KB |
leds-lm3556.rst | -rw-r--r-- | 3.0 KB |
leds-lp3944.rst | -rw-r--r-- | 1.5 KB |
leds-lp5521.rst | -rw-r--r-- | 2.9 KB |
leds-lp5523.rst | -rw-r--r-- | 3.4 KB |
leds-lp5562.rst | -rw-r--r-- | 3.6 KB |
leds-lp55xx.rst | -rw-r--r-- | 6.7 KB |
leds-mlxcpld.rst | -rw-r--r-- | 2.4 KB |
leds-sc27xx.rst | -rw-r--r-- | 989 bytes |
ledtrig-oneshot.rst | -rw-r--r-- | 1.5 KB |
ledtrig-transient.rst | -rw-r--r-- | 6.9 KB |
ledtrig-usbport.rst | -rw-r--r-- | 1.4 KB |
uleds.rst | -rw-r--r-- | 1.2 KB |
well-known-leds.txt | -rw-r--r-- | 2.3 KB |
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