netdev - Re: Linux kernel error stack

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Date:   Sun, 5 Aug 2018 16:01:41 -0400
From:   Satish Patel <satish.txt@...il.com>
To:     Florian Westphal <fw@...len.de>
Cc:     netdev@...r.kernel.org
Subject: Re: Linux kernel error stack

I am configured where are those rules stored why iptables -L -n -t nat
not showing them?

On Sun, Aug 5, 2018 at 3:56 PM, Satish Patel <satish.txt@...il.com> wrote:
> Oh wait!! I think you are right there i didn't notice that iptables
> has following setting.
>
> "CHECKSUM --checksum-fill"
>
> On Sun, Aug 5, 2018 at 3:54 PM, Satish Patel <satish.txt@...il.com> wrote:
>> I have following kernel logging set.
>>
>> [root@...ack-infra-02 tools]# cat /proc/sys/kernel/printk
>> 3 4 1 3
>>
>>
>> iptables output
>>
>> [root@...ack-infra-02 tools]# iptables-save -c
>> # Generated by iptables-save v1.4.21 on Sun Aug  5 15:52:56 2018
>> *raw
>> :PREROUTING ACCEPT [42284573:38782693391]
>> :OUTPUT ACCEPT [219668:42675751]
>> COMMIT
>> # Completed on Sun Aug  5 15:52:56 2018
>> # Generated by iptables-save v1.4.21 on Sun Aug  5 15:52:56 2018
>> *nat
>> :PREROUTING ACCEPT [656413:38450886]
>> :INPUT ACCEPT [5524:564390]
>> :OUTPUT ACCEPT [3217:212903]
>> :POSTROUTING ACCEPT [559058:34193539]
>> [5197:311820] -A POSTROUTING -s 10.0.3.0/24 ! -d 10.0.3.0/24 -j MASQUERADE
>> COMMIT
>> # Completed on Sun Aug  5 15:52:56 2018
>> # Generated by iptables-save v1.4.21 on Sun Aug  5 15:52:56 2018
>> *mangle
>> :PREROUTING ACCEPT [42209568:38687818558]
>> :INPUT ACCEPT [170634:197796840]
>> :FORWARD ACCEPT [42939243:38526139954]
>> :OUTPUT ACCEPT [198956:41288636]
>> :POSTROUTING ACCEPT [43138199:38567428590]
>> [84166:59495417] -A POSTROUTING -p tcp -m tcp --sport 80 -j CHECKSUM
>> --checksum-fill
>> [68739:5153476] -A POSTROUTING -p tcp -m tcp --sport 8000 -j CHECKSUM
>> --checksum-fill
>> [755:275452] -A POSTROUTING -s 10.0.3.0/24 -o lxcbr0 -p udp -m udp
>> --dport 68 -j CHECKSUM --checksum-fill
>> COMMIT
>> # Completed on Sun Aug  5 15:52:56 2018
>> # Generated by iptables-save v1.4.21 on Sun Aug  5 15:52:56 2018
>> *filter
>> :INPUT ACCEPT [164954:197217701]
>> :FORWARD ACCEPT [42801701:38377075499]
>> :OUTPUT ACCEPT [198963:41289860]
>> [0:0] -A INPUT -i lxcbr0 -p tcp -m tcp --dport 53 -j ACCEPT
>> [4932:328918] -A INPUT -i lxcbr0 -p udp -m udp --dport 53 -j ACCEPT
>> [0:0] -A INPUT -i lxcbr0 -p tcp -m tcp --dport 67 -j ACCEPT
>> [755:250585] -A INPUT -i lxcbr0 -p udp -m udp --dport 67 -j ACCEPT
>> [80745:145594351] -A FORWARD -o lxcbr0 -j ACCEPT
>> [56801:3471569] -A FORWARD -i lxcbr0 -j ACCEPT
>> COMMIT
>> # Completed on Sun Aug  5 15:52:56 2018
>>
>> On Sun, Aug 5, 2018 at 3:42 PM, Florian Westphal <fw@...len.de> wrote:
>>> Satish Patel <satish.txt@...il.com> wrote:
>>>> Thanks Florian,
>>>>
>>>> FYI, I don't have any CHECKSUM configure in my iptables,
>>>
>>> You have, according to WARN stacktrace you provided.
>>>
>>> iptables-save -c
>>> ip6tables-save -c