I’ve had to reset my server twice in the past week to restore internet access. But I can still ping google from server..
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Responses (20)
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I haven’t had any issues since my last reboot 14 days ago. I’m starting to believe that accessing the admin page using chrome on my iPad caused my issues by coroupting my dhcp settings.
Chrome will display “root” for my dhcp net mask! And who knows what else... it screws up... even without saving settings. -
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Embarrassingly, it appears my issues stemmed from a dodgy Ethernet cable, I've just moved houses and the problem started occurring after I'd moved into my new place. Exact same cables that I'd used previously, plugged into the exact same ports, only 1m CAT 6's. I replaced both cables in and out of the Clear OS box when it next went down and it fixed the problem immediately, the network came straight back up without needing to reboot, so pretty much HAS to be cable related. Thanks to Nick for trying to figure out what was going on, sorry for wasting your time. -
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if i look at the network map, i can see some devices defaulted to their default ip address which really makes me think it is a dhcp or nat problem... this is strange as clear has be running really well for a long time and i have experienced very long uptimes.
nick, can you reboot your system so you can be on the latest kernel please. -
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i also have nodejs installed and running. about four weeks ago i wrote a service startup script to start my alarm integration server to smartthings (node), so naturally i was thinking that was the cause. but not so much anymore.
# cat /var/clearos/configuration_backup/installed_apps.txt
app-accounts
app-accounts-core
app-antiphishing
app-antiphishing-core
app-antivirus
app-antivirus-core
app-apcups
app-apcups-core
app-bandwidth-viewer
app-bandwidth-viewer-core
app-base
app-base-core
app-certificate-manager
app-certificate-manager-core
app-clearcenter
app-clearcenter-core
app-configuration-backup
app-configuration-backup-core
app-dashboard
app-dashboard-core
app-date
app-date-core
app-dhcp
app-dhcp-core
app-disk-usage
app-disk-usage-core
app-dns
app-dns-core
app-dynamic-dns
app-dynamic-dns-core
app-edition
app-edition-core
app-events
app-events-core
app-firewall
app-firewall-core
app-flexshare
app-flexshare-core
app-ftp
app-ftp-core
app-ftp-plugin-core
app-graphical-console
app-graphical-console-core
app-groups
app-groups-core
app-incoming-firewall
app-incoming-firewall-core
app-intrusion-detection
app-intrusion-detection-core
app-intrusion-prevention
app-intrusion-prevention-core
app-language
app-language-core
app-ldap-core
app-lets-encrypt
app-lets-encrypt-core
app-log-viewer
app-log-viewer-core
app-mail
app-mail-core
app-mail-notification-core
app-marketplace
app-marketplace-core
app-miniupnpd
app-miniupnpd-core
app-mode-core
app-network
app-network-core
app-network-map
app-network-map-core
app-ntp
app-ntp-core
app-openldap-core
app-openldap-directory-core
app-openvpn
app-openvpn-core
app-openvpn-plugin-core
app-organization
app-organization-core
app-plex
app-plex-core
app-port-forwarding
app-port-forwarding-core
app-process-viewer
app-process-viewer-core
app-raid
app-raid-core
app-registration
app-registration-core
app-samba
app-samba-common-core
app-samba-core
app-samba-extension-core
app-simple-mode-core
app-smtp-core
app-software-updates
app-software-updates-core
app-ssh-server
app-ssh-server-core
app-storage-core
app-support
app-support-core
app-suva-core
app-tasks-core
app-user-certificates
app-user-certificates-core
app-user-certificates-plugin-core
app-user-profile
app-user-profile-core
app-users
app-users-core
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There is nothing obvious there. From your output, you don't have an RTL8168 which can cause issues. Your DHCP server config is OK but you have narrowed the IP range right down and your router IP is in a not-so-standard place, but is not an issue.
I've no idea what your np0s25 interface is. I've never seen one with this sort of name.
I started relying to the post before Dave replied, but for Dave, if it is a firewall issue and connection tracking is stopping a firewall restart from having an immediate effect, you can flush all the firewall connection tracking with:yum install conntrack
conntrack -F
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Eric,
I have a similar problem. Up until your post I was just attributing the failure to the experimental motherboard of the server but your description is similar to some behavior I've been seeing. The symptoms are that
- the network appears to go offline
- pings don't work from workstations to any external IP except the server's public IP
- the server itself can ping everything and DNS is working
- restarting the firewall doesn't seem to work immediately but after a few minutes it does come back online
I do not experience the DHCP issue you or PGriffith report. The biggest problem I have with this bug is that I cannot reproduce it at will but have to wait for it and up until now it seemed to be a hardware issue. So thanks for your report.
Can you send me a list of the modules of ClearOS that you have installed. A list is contained in the text file located in /var/clearos/configuration_backup/installed_apps.txt
That can help us narrow down a potential interaction. I know that some machines are not affected by this issue so I don't know what the outlier element is. When I talked to Nick he indicated that conntrack can behave poorly. Next time I have this issue I will be snapshotting my iptables and nat tables to compare against a working set. -
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Thanks Nick, here is everything you requested. Let me know if there is anything else you'd like to see.
yum.log
Jul 01 01:54:01 Updated: python-libs-2.7.5-80.el7_6.x86_64
Jul 01 01:54:01 Updated: 1:app-configuration-backup-core-2.5.2-1.v7.noarch
Jul 01 01:54:01 Updated: 1:app-configuration-backup-2.5.2-1.v7.noarch
Jul 01 01:54:01 Updated: python-2.7.5-80.el7_6.x86_64
Jul 01 01:54:02 Updated: 1:app-storage-core-2.6.15-1.v7.noarch
Jul 01 01:54:02 Updated: snort-2.9.6.2-9.v7.x86_64
Jul 07 11:57:12 Updated: glibc-common-2.17-260.el7_6.6.x86_64
Jul 07 11:57:13 Updated: glibc-2.17-260.el7_6.6.x86_64
Jul 07 11:57:13 Updated: systemd-libs-219-62.el7_6.7.x86_64
Jul 07 11:57:15 Updated: systemd-219-62.el7_6.7.x86_64
Jul 07 11:57:15 Updated: 7:device-mapper-1.02.149-10.el7_6.8.x86_64
Jul 07 11:57:15 Updated: 7:device-mapper-libs-1.02.149-10.el7_6.8.x86_64
Jul 07 11:57:15 Updated: 7:device-mapper-event-libs-1.02.149-10.el7_6.8.x86_64
Jul 07 11:57:15 Updated: 7:device-mapper-event-1.02.149-10.el7_6.8.x86_64
Jul 07 11:57:15 Updated: 7:lvm2-libs-2.02.180-10.el7_6.8.x86_64
Jul 07 11:57:15 Updated: libteam-1.27-6.el7_6.1.x86_64
Jul 07 11:57:17 Updated: 1:app-base-core-2.7.4-1.v7.noarch
Jul 07 11:57:17 Updated: 1:app-base-2.7.4-1.v7.noarch
Jul 07 11:57:17 Updated: teamd-1.27-6.el7_6.1.x86_64
Jul 07 11:57:18 Updated: 7:lvm2-2.02.180-10.el7_6.8.x86_64
Jul 07 11:57:18 Updated: systemd-sysv-219-62.el7_6.7.x86_64
Jul 07 11:57:18 Updated: nscd-2.17-260.el7_6.6.x86_64
Jul 07 11:57:29 Updated: 2:microcode_ctl-2.1-47.5.el7_6.x86_64
Jul 07 11:57:29 Updated: systemd-python-219-62.el7_6.7.x86_64
Jul 07 11:57:29 Updated: 2:vim-minimal-7.4.160-6.el7_6.x86_64
Jul 07 11:57:41 Updated: gconsole-60.3.0-1.v7.2.x86_64
Jul 10 18:22:44 Updated: 1:app-configuration-backup-core-2.5.3-1.v7.noarch
Jul 10 18:22:44 Updated: 1:app-configuration-backup-2.5.3-1.v7.noarch
Jul 10 18:22:44 Updated: 1:app-storage-core-2.6.16-1.v7.noarch
network.conf
# Network mode
MODE="gateway"
# Network interface roles
EXTIF="ppp0"
LANIF="ens2"
DMZIF=""
HOTIF=""
# Domain and Internet Hostname
DEFAULT_DOMAIN="griff.com"
INTERNET_HOSTNAME="gateway.griff.com"
# Extra LANS
EXTRALANS=""
# ISP Maximum Speeds
PPP0_MAX_DOWNSTREAM=46310
PPP0_MAX_UPSTREAM=17530
ENP0S25_MAX_DOWNSTREAM=0
ENP0S25_MAX_UPSTREAM=0
dhcp.conf
# This file is managed by the API. Please add custom options in dnsmasq.conf.
dhcp-option=ens2,1,255.255.255.0
dhcp-option=ens2,28,10.0.0.255
dhcp-option=ens2,3,10.0.0.139
dhcp-option=ens2,6,10.0.0.139
dhcp-range=ens2,10.0.0.100,10.0.0.130,24h
ifconfig output
np0s25: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fd79:1f40:b55b:0:dad3:85ff:fe00:a6a8 prefixlen 64 scopeid 0x0<global>
inet6 fe80::dad3:85ff:fe00:a6a8 prefixlen 64 scopeid 0x20<link>
ether d8:d3:85:00:a6:a8 txqueuelen 1000 (Ethernet)
RX packets 2785005 bytes 2428057977 (2.2 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2028018 bytes 869865354 (829.5 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 22 memory 0xd4800000-d4820000
ens2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.0.139 netmask 255.255.255.0 broadcast 10.0.0.255
inet6 fe80::211:22ff:fe33:476e prefixlen 64 scopeid 0x20<link>
ether 00:11:22:33:47:6e txqueuelen 1000 (Ethernet)
RX packets 2184868 bytes 869251946 (828.9 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2771234 bytes 2396051585 (2.2 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 18
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 2518 bytes 296894 (289.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2518 bytes 296894 (289.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1492
inet 118.208.205.182 netmask 255.255.255.255 destination 150.101.32.142
ppp txqueuelen 3 (Point-to-Point Protocol)
RX packets 2782859 bytes 2355523608 (2.1 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2026123 bytes 816893239 (779.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lspci -k | grep Eth -A 3
00:19.0 Ethernet controller: Intel Corporation 82567LM Gigabit Network Connection (rev 03)
Subsystem: Hewlett-Packard Company Device 30db
Kernel driver in use: e1000e
Kernel modules: e1000e
--
02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit Ethernet Controller (rev 22)
Subsystem: Santa Cruz Operation Device 2222
Kernel driver in use: sky2
Kernel modules: sky2 -
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If you have not dug into ClearOS before, this could be a little tricky. Firstly I'll say I am not sure we have released any apps which could cause this, but there may have been some upstream releases which we just push through causing problems but I am not aware of anything on my machines.
If you are a Windows user, please can you get hold of a copy of WinSCP and PuTTY. WinSCP is a graphical file manager and text editor and PuTTy is a remote console tool. You can copy from PuTTy just by selecting text with the mouse, and paste into it by right-clicking.
In PuTTy, what is the output to:lspci -k | grep Eth -A 3
From /var/log/yum.log, what updates have you received from about when you started noticing the issues? Copy and paste the section of log from when the problem began.
Following from the previous posts, what are the contents of /etc/dnsmasq.d/dhcp.conf and /etc/clearos/network.conf and the result of "ifconfig".
Please put all results between code tags (the piece of paper icon with a <> on it at the top of the reply box). -
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I'm having some weird issues as well in the last 2 weeks. My network just stops working, no response from DHCP server from any machine on the network if I try an ipconfig/release/renew. I can log into the box locally and see that it still has an external IP, but I can't access the machine from the web console, the only way to restore it is to restart the box. Been running stable for literally years until the last 2-3 weeks. I'm having to do this around every day or so, sometimes I'll get 2 or 3 days out of it. Thought it had rectified itself as it had been a few days but it just happened again, so hence me looking in these forums to see if anyone else is reporting an issue. If anyone wants me to check anything, you will need to step me through it, total linux noob here, never had to go 'under the hood' so to speak, only the web interface. -
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Really odd. I am not aware of any updates which could have done that. The ClearOS default is to .100-.254 for DHCP. I don't use that and use .128-.191 (an exact /26 subnet), and I have not seen any change to it. Also the DHCP server has not been updated since at least November - there was a change and it is in updates-testing, but the change needs to b backed out before it can be released. -
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Last login: Sat Jul 13 09:11:56 2019 from erics-ipad.1scom.net
[root@orion ~]# lspci -k | grep Eth -A 3
00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 04)
Subsystem: Gigabyte Technology Co., Ltd Device e000
Kernel driver in use: e1000e
Kernel modules: e1000e
--
07:00.0 Ethernet controller: Qualcomm Atheros AR8161 Gigabit Ethernet (rev 10)
Subsystem: Gigabyte Technology Co., Ltd Device e000
Kernel driver in use: alx
Kernel modules: alx -
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