Re: [CentOS] CentOS 7 1708 won't boot after grub2 update

2018-02-19 Thread Sorin Srbu 
> -Original Message-
> From: CentOS [mailto:centos-boun...@centos.org] On Behalf Of Steven
> Tardy
> Sent: den 20 februari 2018 02:36
> To: CentOS mailing list 
> Subject: Re: [CentOS] CentOS 7 1708 won't boot after grub2 update
> 
> On Mon, Feb 19, 2018 at 7:01 AM Sorin Srbu  wrote:
> 
> > Hi all,
> >
> > This is the third fresh install of CentOS 7 1708 the last two months
that
> > won't boot after a regular "yum update" just after the fresh install has
> > finished.
> 
> 
> 
> Not nearly enough details given. . .

So, guessing this isn't a common problem then?
Details below, please let me know if more or other info is needed.

> What disk controller? `lspci`
00:1f.2 SATA controller: Intel Corporation C600/X79 series chipset 6-Port
SATA AHCI Controller (rev 06)


> Legacy BIOS or UEFI?
Legacy.


> What disk layout? `lsblk`
NAMEMAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda   8:00 931.5G  0 disk
ââsda18:10 931.5G  0 part /home.1TB
sdb   8:16   0 111.8G  0 disk
ââsdb18:17   0 1G  0 part /boot
ââsdb28:18   0 110.8G  0 part
  ââcentos-root 253:0050G  0 lvm  /
  ââcentos-swap 253:10   9.8G  0 lvm  [SWAP]
  ââcentos-home 253:2051G  0 lvm  /home
sdc   8:32   0   1.8T  0 disk
ââsdc18:33   0   1.8T  0 part /home.2TB
sr0  11:01  1024M  0 rom


> What storage driver? `lsmod`
libata238896  2 ahci,libahci



--
//Sorin


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Re: [CentOS] Problem with ssh disconnecting

2018-02-19 Thread Marcelo Ricardo Leitner 
On Mon, Feb 12, 2018 at 08:05:18PM -0500, H wrote:
...
> Not sure if I am reading your reply correctly but I should clarify
> that I have problems when running naked ssh to the server, when I
> run ssh to the same server but over the VPN connection (that goes
> via third server) everything is flawless.
> 
> I should also explain that:
> 
> - I am on a workstation (located in the US), ssh-ing into server 1
> (located in the US).
> 
> - From server 1 I use scp to transfer large files from server 2
> (located in Europe) to server 1 (in the US).
> 
> The above randomly disconnects.

You have two ssh sessions here. AFAICT, it's the first one
(workstation->server 1) that randomly disconnects, right?

> 
> However, when:
> 
> - I use a VPN connection to server 3 (also located in Europe).
> 
> - From the same workstation as above, do exactly as above,
> connections are rock-solid.

It would seem to me that something between your workstation and server
1 is possibly mishandling TCP options (being it sack, timestamps or
both).  Is there a router or a firewall in between?

Try doing a traffic capture between both and see why it hangs. If
you're hesitant to post the binary traffic capture, post the text
version of it with anonymized IP addresses. Just please be sure to
disable ssh protocol so it would include TCP details on it then.

  Marcelo
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Re: [CentOS] Problem with ssh disconnecting

2018-02-19 Thread H 
On 02/12/2018 09:12 PM, Earl Ramirez wrote:
> On Mon, 2018-02-12 at 20:13 -0500, H wrote:
>> On 02/12/2018 07:24 PM, Liam O'Toole wrote:
>>> On 2018-02-12, H  wrote:
 Running CentOS 7 on workstation and having a problem with ssh
 disconnects. My ssh_config contains:

 Host *
 TCPKeepAlive yes
 ServerAliveInterval 30
 ServerAliveCountMax 300

 and sshd_config on the server contains:

 TCPKeepAlive yes
 ClientAliveInterval 60
 ClientAliveCountMax 300

 Have I missed any setting needed to prevent these random
 disconnects?
 I don't think there is anything wrong with the network card, the
 driver, or the cable, since if I am on a VPN connection via
 another
 server, the VPN and any ssh connection stay up indefinitely.

 Thanks.
>>> Another poster has provided some possible reasons for the
>>> disconnections. Whatever the cause, autossh (from the epel repo) is
>>> a
>>> good workaround.
>>>
>> Not that this happens while I do large scp file transfers that may
>> take more than half an hour, simply restarting an ssh session is not
>> going to help since I will lose the file transfer.
>>
> I don't know if this would help but I had a similar issue and it turned
> out that there was a custom script in /etc/profile.d/ that contain
> TMOUT 900.
>
> You can also check in /etc/profile, usually, the security logs has
> something about the disconnects, of you can use wireshark or a similar
> tool to capture and analyse the packets.
>
>
>
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I think that I forgot to mention that the problem is not the common "write 
failed: broken pipe" but "packet_write_wait: broken pipe".

I don't think the problem is router related since another computer, albeit 
running CentOS 6, does not have similar issues.

Does the information above suggest any other reason for my problem?



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Re: [CentOS] CentOS 7 1708 won't boot after grub2 update

2018-02-19 Thread Steven Tardy 
On Mon, Feb 19, 2018 at 7:01 AM Sorin Srbu  wrote:

> Hi all,
>
> This is the third fresh install of CentOS 7 1708 the last two months that
> won't boot after a regular "yum update" just after the fresh install has
> finished.



Not nearly enough details given. . .
What disk controller? `lspci`
Legacy BIOS or UEFI?
What disk layout? `lsblk`
What storage driver? `lsmod`
BTW, anyone have a good method for finding driver for a given
disk(/dev/sdX)?
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[CentOS] Pulse Secure/Juniper Networks Network Connect (CentOS 7)

2018-02-19 Thread Toralf Lund 

Hi,

Is anyone here using the "Network Connect" VPN software from Pulse 
Secure (which was previously known as Juniper Networks Network Connect)?


I've used this successfully in the past to connect to the machines at 
work from home. That was with CentOS 6, though, on CentOS 7 I can't seem 
to get it to work. The software actually starts, and it also 
successfully sets up a "tun" type network device with an IP address, but 
I can't reach anything across the connection. In fact, even resources 
outside VPN/the company network become unreachable.


Does anyone have any idea what may be wrong? Output from /sbin/ifconfig 
as well as /sbin/route from a typical session are included below.


Thanks.

- Toralf

--
enp0s31f6: flags=4099  mtu 1500
    ether c8:5b:76:f7:d1:9c  txqueuelen 1000  (Ethernet)
    RX packets 6523788  bytes 5286956088 (4.9 GiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 1417201  bytes 209955717 (200.2 MiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    device interrupt 16  memory 0xf120-f122

lo: flags=73  mtu 65536
    inet 127.0.0.1  netmask 255.0.0.0
    inet6 ::1  prefixlen 128  scopeid 0x10
    loop  txqueuelen 1  (Local Loopback)
    RX packets 487991  bytes 165475903 (157.8 MiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 487991  bytes 165475903 (157.8 MiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tun0: flags=4305 mtu 1400
    inet 10.30.250.90  netmask 255.255.255.255  destination 
10.30.250.90

    inet6 fe80::1ddf:c174:c72c:81e  prefixlen 64  scopeid 0x20
    unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 
txqueuelen 500  (UNSPEC)

    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 1  bytes 48 (48.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlan0: flags=4163  mtu 1500
    inet 192.168.130.123  netmask 255.255.255.0  broadcast 
192.168.130.255

    inet6 fe80::ed8f:66bd:4f45:f3e4  prefixlen 64  scopeid 0x20
    ether 14:ab:c5:06:57:c0  txqueuelen 1000  (Ethernet)
    RX packets 34172  bytes 33693984 (32.1 MiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 24197  bytes 5277607 (5.0 MiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref    Use 
Iface

default osl-97214   0.0.0.0 UG    1 0    0 tun0
default Zhone.Home  0.0.0.0 UG    600 0    0 wlan0
192.168.130.0   0.0.0.0 255.255.255.0   U 600 0    0 wlan0
Zhone.Home  0.0.0.0 255.255.255.255 UH    1 0    0 wlan0
remote.pgs.com  Zhone.Home  255.255.255.255 UGH   1 0    0 wlan0


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Re: [CentOS] Is CentOS Linux protected against the Meltdown and Spectre security flaws?

2018-02-19 Thread Leon Fauster 

> Am 19.02.2018 um 13:52 schrieb Götz Reinicke :
> 
>> Am 19.02.2018 um 13:18 schrieb Turritopsis Dohrnii Teo En Ming 
>> :
>> 
>> What are the patches that I can download and install to be protected
>> against the Meltdown and Spectre security vulnerabilities?
>> 
> 
> Hi,
> 
> Depends on your centos release; 6 or 7 … The most recent kernel are patched; 
> have a look at the release notes, e.g.
> 
> https://www.redhat.com/archives/rhsa-announce/2018-January/msg00080.html 
> 
> 
> https://access.redhat.com/errata/RHSA-2018:0008 
> 
> 
> Regards . Götz


Despite the fact that some mitigations are only effective in combination with 
corresponding cpu microcode ...

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[CentOS-announce] [Infra] - planned outage : bugs.centos.org (Bug Tracker)

2018-02-19 Thread Fabian Arrotin 
This notification to let you know that we'll migrate our
https://bugs.centos.org bug tracker service to a different node, and
also updated to a new version of MantisBT (version 2.x)

This migration will give us more possibilities, including soon trying to
get SSO working even on our bug tracker (that part still need to be done
though)

Migration is scheduled for Tuesday February 20th, 8:00 am UTC time.
You can convert to local time with $(date -d '2018-2-20 8:00 UTC')

The expected "downtime" is estimated to ~10 minutes , time needed to
update/propagate updated dns A/ records + last mysql dump/restore on the
new node.

Thanks for your comprehending and patience.

on behalf of the Infra team,
-- 
Fabian Arrotin
The CentOS Project | https://www.centos.org
gpg key: 56BEC54E | twitter: @arrfab



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Re: [CentOS] Is CentOS Linux protected against the Meltdown and Spectre security flaws?

2018-02-19 Thread Götz Reinicke 
Hi,

Depends on your centos release; 6 or 7 … The most recent kernel are patched; 
have a look at the release notes, e.g.

https://www.redhat.com/archives/rhsa-announce/2018-January/msg00080.html 


https://access.redhat.com/errata/RHSA-2018:0008 


Regards . Götz


> Am 19.02.2018 um 13:18 schrieb Turritopsis Dohrnii Teo En Ming 
> :
> 
> What are the patches that I can download and install to be protected
> against the Meltdown and Spectre security vulnerabilities?
> 
> ===BEGIN SIGNATURE===
> 
> Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017
> 
> [1] https://tdtemcerts.wordpress.com/
> 
> [2] http://tdtemcerts.blogspot.sg/
> 
> [3] https://www.scribd.com/user/270125049/Teo-En-Ming
> 
> ===END SIGNATURE===

<…>


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[CentOS] Is CentOS Linux protected against the Meltdown and Spectre security flaws?

2018-02-19 Thread Turritopsis Dohrnii Teo En Ming 
What are the patches that I can download and install to be protected
against the Meltdown and Spectre security vulnerabilities?

===BEGIN SIGNATURE===

Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017

[1] https://tdtemcerts.wordpress.com/

[2] http://tdtemcerts.blogspot.sg/

[3] https://www.scribd.com/user/270125049/Teo-En-Ming

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[CentOS] CentOS 7 1708 won't boot after grub2 update

2018-02-19 Thread Sorin Srbu 
Hi all,

This is the third fresh install of CentOS 7 1708 the last two months that
won't boot after a regular "yum update" just after the fresh install has
finished.

I've never had this problem before, it has just worked. 
The installs are on OEM's that have previously run CentOS 6.9 x64.

Am I missing something here?

-- 
BW,
Sorin
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