Re: [CentOS] CentOS 7 system running out of available memory, then unusable, network interfaces probably involved

2020-06-30 Thread wwp
Hello John,


On Mon, 29 Jun 2020 12:54:58 -0700 John Pierce  wrote:

> On Mon, Jun 29, 2020 at 12:47 PM wwp  wrote:
> 
> >
> > Nothing jumps to my eyes looking at /var/log/messages but this, many
> > occurrences:
> >   kernel: nf_conntrack: falling back to vmalloc.
> >  
> 
> nf_conntrack is only involved if you are doing some form of NAT routing on
> this system and/or fairly complex iptables kind of rules

On this machine I do not do anything at iptables or firewall level but
opening ports for SSHD.


> you mentioned two different network interfaces, one wired, one
> wireless, how are you using these, what sort of routing between the
> two networks ?

The wired interface is directly bound to a 4G router (dhcp).
The wireless one is connected to a LAN (wifi -> wifi AP -> wire -> switch ->
wire -> router with iptables+dhcp -> wire -> xDSL box).


Regards,

-- 
wwp
https://useplaintext.email/


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Re: [CentOS] CentOS 7 system running out of available memory, then unusable, network interfaces probably involved

2020-06-29 Thread John Pierce
On Mon, Jun 29, 2020 at 12:47 PM wwp  wrote:

>
> Nothing jumps to my eyes looking at /var/log/messages but this, many
> occurrences:
>   kernel: nf_conntrack: falling back to vmalloc.
>

nf_conntrack is only involved if you are doing some form of NAT routing on
this system and/or fairly complex iptables kind of rules  you mentioned
two different network interfaces, one wired, one wireless, how are you
using these, what sort of routing between the two networks ?



-- 
-john r pierce
  recycling used bits in santa cruz
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