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    PfSense wakes my Synology NAS boxes from hibernation every 1 hour….

    Scheduled Pinned Locked Moved General pfSense Questions
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    • DerelictD
      Derelict LAYER 8 Netgate
      last edited by

      Me? I'd put the NAS on a mirror port on my switch, let it sleep, then run a packet capture until it's woken up and see what caused it.

      Why guess at the problem?

      Chattanooga, Tennessee, USA
      A comprehensive network diagram is worth 10,000 words and 15 conference calls.
      DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
      Do Not Chat For Help! NO_WAN_EGRESS(TM)

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      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        Agreed take a sniff and see exactly what is causing a wake up.

        An intelligent man is sometimes forced to be drunk to spend time with his fools
        If you get confused: Listen to the Music Play
        Please don't Chat/PM me for help, unless mod related
        SG-4860 24.11 | Lab VMs 2.8, 24.11

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        • P
          pfcode
          last edited by

          @johnpoz:

          Agreed take a sniff and see exactly what is causing a wake up.

          As my NAS hibernation logs tells, also from Synology tech support:

          It appears that the router keeps trying to distribute DHCP addresses to the units, even though they already have an IP address.

          I'm not sure its the NAS problem or pfSense problem,  NAS is sending DHCPREQUEST command to pfSense every 1 hour, but if the lease time isn't expired, Shouldn't pfSense NOT distribute DHCP address to the unit?

          Release: pfSense 2.4.3(amd64)
          M/B: Supermicro A1SRi-2558F
          HDD: Intel X25-M 160G
          RAM: 2x8Gb Kingston ECC ValueRAM
          AP: Netgear R7000 (XWRT), Unifi AC Pro

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          • D
            doktornotor Banned
            last edited by

            @pfcode:

            It appears that the router keeps trying to distribute DHCP addresses to the units, even though they already have an IP address.

            Yes, of course, the DHCP server keeps "distributing" IP address requested by your NAS, kindly cf.

            
            dhcpd: DHCPREQUEST <my nas="" lan="" ip="">from <my nas="" mac="" addr="">via em1</my></my> 
            

            Also, the DHCP leases expire and need to get renewed (after a configurable period. check the GUI). So yeah, this will happen "even though they already have an IP address", perhaps the Synology support could educate themselves a bit.

            Finally, if you do not want DHCP, then configure a static IP on your NAS and move on!

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            • H
              hda
              last edited by

              @pfcode:

              … but I only created it at pfSense side ...

              Before you jump in mirroring investigation, if you know-how. I am not sure if you are exact & correct. You really should test giving the NAS a new number manually (outside the range/pool) AND manually input it in pfSense too.
              This is to assure yourself the volatile memory about .107 is flushed on both sides… Maybe even reboot both hardware.

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              • DerelictD
                Derelict LAYER 8 Netgate
                last edited by

                Yes.  It should not be a DHCP static mapping.  That still has to periodically renew.  It should be a static IP address directly configured on the NAS, outside the DHCP pool.

                Chattanooga, Tennessee, USA
                A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                • johnpozJ
                  johnpoz LAYER 8 Global Moderator
                  last edited by

                  What dhcp server doesn't just out of the blue send out hey you want to renew your lease packets.. But if it gets a request then yeah it will send back something..

                  Tell their their Tech Support to tell you how not to send a request.. What is the lease time to start with 2 hours?  Normally a dhcp client will request renewal of its lease at the 50% mark.  So if you want the nas not to request, then it should be long lease.  If the device is in standby/sleep why would it send out a dhcprequest is the question I would have.

                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                  If you get confused: Listen to the Music Play
                  Please don't Chat/PM me for help, unless mod related
                  SG-4860 24.11 | Lab VMs 2.8, 24.11

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                  • DerelictD
                    Derelict LAYER 8 Netgate
                    last edited by

                    True.  Should stop guessing and sniff.

                    Chattanooga, Tennessee, USA
                    A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                    DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                    Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                    • D
                      doktornotor Banned
                      last edited by

                      @johnpoz:

                      If the device is in standby/sleep why would it send out a dhcprequest is the question I would have.

                      This is not really any suspend-to-disk/ram hibernation. The only thing "hibernating" are the HDDs which are spun down. Now, look at this:

                      
                      # ps ax | grep dhclient
                       4606 ?        Ss     0:00 /usr/sbin/dhclient -4 -d -q -lf /etc/dhclient/ipv4/dhcpv4.leases.eth0 -pf /etc/dhclient/ipv4/dhcpcd-eth0.pid eth0
                       5551 ?        Ss     0:00 /usr/sbin/dhclient -6 -pf /tmp/dhclient6-eth0.pid -lf /etc/dhclient/ipv6/dhcpv6.lease.eth0 -cf /etc/dhclient/ipv6/dhcpv6.conf.eth0 -nw eth0
                      
                      

                      Those dhcpv[46].lease.eth? files have stuff like this:

                      
                      lease {
                        interface "eth0";
                        fixed-address 192.168.1.10;
                        option subnet-mask 255.255.255.0;
                        option routers 192.168.1.1;
                        option dhcp-lease-time 7200;
                        option dhcp-message-type 5;
                        option domain-name-servers 192.168.1.1;
                        option dhcp-server-identifier 192.168.1.1;
                        option host-name "DiskStation";
                        option domain-name "example.com";
                        renew 2 2015/05/19 19:46:58;
                        rebind 2 2015/05/19 20:35:47;
                        expire 2 2015/05/19 20:50:47;
                      }
                      
                      

                      This is just stupid. There's /tmp which is on tmpfs (ramdisk). Now, the lease file is on /etc instead, which is a HDD. Of course, when the lease is renewed, the HDD needs to spin up to write to the file.

                      Tell Synology to move their temporary dhcpv[46].lease.eth? shit to /tmp when people enable "hibernation" – and it won't wake up HDDs from hibernation.  ::)

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                      • johnpozJ
                        johnpoz LAYER 8 Global Moderator
                        last edited by

                        the hdd are just spun down - ah yeah wouldn't call that sleep anything ;)

                        If that lease file is from actual nas then looks to be only 2 hour lease..  That is not the default lease time in pfsense dhcp server is it?  Thought it was like 24, yup quick look on dhcp server tab "The default is 86400 seconds." So the nas is only requesting 2 hours by default?

                        An intelligent man is sometimes forced to be drunk to spend time with his fools
                        If you get confused: Listen to the Music Play
                        Please don't Chat/PM me for help, unless mod related
                        SG-4860 24.11 | Lab VMs 2.8, 24.11

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                        • D
                          doktornotor Banned
                          last edited by

                          @johnpoz:

                          If that lease file is from actual nas then looks to be only 2 hour lease..  That is not the default lease time in pfsense dhcp server is it?  Thought it was like 24, yup quick look on dhcp server tab "The default is 86400 seconds." So the nas is only requesting 2 hours by default?

                          The default lease time is 7200 seconds on pfSense; the default maximum lease time is 86400 secs (one day).

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                          • johnpozJ
                            johnpoz LAYER 8 Global Moderator
                            last edited by

                            you are correct as always dok

                            Lease Obtained. . . . . . . . . . : Tuesday, May 19, 2015 3:23:15 PM
                              Lease Expires . . . . . . . . . . : Tuesday, May 19, 2015 5:23:15 PM

                            doh – helps if you actually read what your doing a copy of.  quick enough fix ;)

                            Lease Obtained. . . . . . . . . . : Tuesday, May 19, 2015 3:23:15 PM
                              Lease Expires . . . . . . . . . . : Wednesday, May 20, 2015 3:28:28 PM

                            Now its 24 hours..

                            An intelligent man is sometimes forced to be drunk to spend time with his fools
                            If you get confused: Listen to the Music Play
                            Please don't Chat/PM me for help, unless mod related
                            SG-4860 24.11 | Lab VMs 2.8, 24.11

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                            • DerelictD
                              Derelict LAYER 8 Netgate
                              last edited by

                              I might have read something somewhere about clients requesting renewal halfway through their lease.

                              Chattanooga, Tennessee, USA
                              A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                              DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                              Do Not Chat For Help! NO_WAN_EGRESS(TM)

                              1 Reply Last reply Reply Quote 0
                              • P
                                pfcode
                                last edited by

                                Thanks All,  by assigning a manual IP in the NAS network configuration, solved the issue,  It was 'get network configuration automatically (DHCP)' before.  I will let the Synology tech guys to investigate further to why it is sending dhcprequest every 1 hour (3600 seconds) to the router.

                                Release: pfSense 2.4.3(amd64)
                                M/B: Supermicro A1SRi-2558F
                                HDD: Intel X25-M 160G
                                RAM: 2x8Gb Kingston ECC ValueRAM
                                AP: Netgear R7000 (XWRT), Unifi AC Pro

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                                • D
                                  doktornotor Banned
                                  last edited by

                                  @pfcode:

                                  I will let the Synology tech guys to investigate further to why it is sending dhcprequest every 1 hour (3600 seconds) to the router.

                                  Well, because you did not configure any default lease time, so you get 2 hours by default, since Synology DSM does not supply any lease time in the DHCP request… That's not what wakes it up, there'd be no problem with that if they were not writing the lease file to the HDD instead of tmpfs.

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                                  • N
                                    NOYB
                                    last edited by

                                    @pfcode:

                                    @johnpoz:

                                    Agreed take a sniff and see exactly what is causing a wake up.

                                    As my NAS hibernation logs tells, also from Synology tech support:

                                    It appears that the router keeps trying to distribute DHCP addresses to the units, even though they already have an IP address.

                                    I'm not sure its the NAS problem or pfSense problem,  NAS is sending DHCPREQUEST command to pfSense every 1 hour, but if the lease time isn't expired, Shouldn't pfSense NOT distribute DHCP address to the unit?

                                    Dude or Dudette.  Whichever the case may be.  Why do you continue asking question with you've been given the answer?

                                    The definitive answer to your issue is in the sniff.  No one can tell you (without guessing) what is waking your NAS without visibility to what is on the wire.  Sniff it and report back with the capture.

                                    If you want to discuss DHCP protocol, I suggest the DHCP and DNS forum.

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                                    • P
                                      pfcode
                                      last edited by

                                      @doktornotor:

                                      @johnpoz:

                                      If the device is in standby/sleep why would it send out a dhcprequest is the question I would have.

                                      This is not really any suspend-to-disk/ram hibernation. The only thing "hibernating" are the HDDs which are spun down. Now, look at this:

                                      
                                      # ps ax | grep dhclient
                                       4606 ?        Ss     0:00 /usr/sbin/dhclient -4 -d -q -lf /etc/dhclient/ipv4/dhcpv4.leases.eth0 -pf /etc/dhclient/ipv4/dhcpcd-eth0.pid eth0
                                       5551 ?        Ss     0:00 /usr/sbin/dhclient -6 -pf /tmp/dhclient6-eth0.pid -lf /etc/dhclient/ipv6/dhcpv6.lease.eth0 -cf /etc/dhclient/ipv6/dhcpv6.conf.eth0 -nw eth0
                                      
                                      

                                      Those dhcpv[46].lease.eth? files have stuff like this:

                                      
                                      lease {
                                        interface "eth0";
                                        fixed-address 192.168.1.10;
                                        option subnet-mask 255.255.255.0;
                                        option routers 192.168.1.1;
                                        option dhcp-lease-time 7200;
                                        option dhcp-message-type 5;
                                        option domain-name-servers 192.168.1.1;
                                        option dhcp-server-identifier 192.168.1.1;
                                        option host-name "DiskStation";
                                        option domain-name "example.com";
                                        renew 2 2015/05/19 19:46:58;
                                        rebind 2 2015/05/19 20:35:47;
                                        expire 2 2015/05/19 20:50:47;
                                      }
                                      
                                      

                                      This is just stupid. There's /tmp which is on tmpfs (ramdisk). Now, the lease file is on /etc instead, which is a HDD. Of course, when the lease is renewed, the HDD needs to spin up to write to the file.

                                      Tell Synology to move their temporary dhcpv[46].lease.eth? shit to /tmp when people enable "hibernation" – and it won't wake up HDDs from hibernation.  ::)

                                      This is a good catch. Thanked.

                                      Release: pfSense 2.4.3(amd64)
                                      M/B: Supermicro A1SRi-2558F
                                      HDD: Intel X25-M 160G
                                      RAM: 2x8Gb Kingston ECC ValueRAM
                                      AP: Netgear R7000 (XWRT), Unifi AC Pro

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