Negate SOHO receving dhcp updates from ISP dhcp server & causing disconnects with internet

  • R
    r0sebush a day ago

    I have a netgate SOHO router, with the lastest version of pfsense.
    For the past few weeks, my sessions are getting disconnected, like my VPN into work and some games, website etc.

    I see in the system logs, when this may be occuring:
    Sep 18 11:02:35 rc.gateway_alarm 3471 >>> Gateway alarm: WAN_DHCP (Addr: Alarm:1 RTT:7938ms RTTsd:1019ms Loss:22%)
    Sep 18 11:02:35 check_reload_status updating dyndns WAN_DHCP
    Sep 18 11:02:35 check_reload_status Restarting ipsec tunnels
    Sep 18 11:02:35 check_reload_status Restarting OpenVPN tunnels/interfaces
    Sep 18 11:02:35 check_reload_status Reloading filter
    Sep 18 11:03:39 rc.gateway_alarm 64926 >>> Gateway alarm: WAN_DHCP (Addr: Alarm:0 RTT:8141ms RTTsd:1420ms Loss:5%)
    Sep 18 11:03:39 check_reload_status updating dyndns WAN_DHCP
    Sep 18 11:03:39 check_reload_status Restarting ipsec tunnels
    Sep 18 11:03:39 check_reload_status Restarting OpenVPN tunnels/interfaces

    I have "chater" spectrum itnernet. it's a 60 mb/ 4mb up system. I have a cisco modem DPC3008.

    Not sure why this is happening, but I saw a no too similar issue, where it was recommend to enable traffic shaping using PIRQ. So I set my speeds to 58Mb / 4 MB up. Seems to work, but there have been additional resets. Is this an issue with the PFSENSE and how it monitors the CISCO Modem? Do I need to disable the monitorings & actions?

    Should I down grade b? Or do I need to understand from Spectrum why are they sending DHCP requests/refresh to my modem & thus causing the router to reload stuff. ** I've called them & they said they don't send frequent requests, but I don't think that they research this. So they're sending a new modem for me to test. ** IF there are issues, they will send another lines-man to test external lines again.

    I had the cable line from the pole to house replaced. The tech found there was some kind of surge & it was causing timeouts on the line. Not sure if this is related to a much larger issue.

    Any help would be appreciated. Thank you.

  • @r0sebush
    I've done a packet capture. It appears that the DHCP server is sending out a DHCP Offer. Not sure why the NETGATE is resetting some of my sessions/connections. Between the DHCP requests there are multiple ICMP PiNGs to the modem.

    150122 1729.155768 DHCP 351 DHCP Offer - Transaction ID 0x5e6ff866
    150135 1731.173643 DHCP 351 DHCP ACK - Transaction ID 0x5e6ff866

    Any clues? Why is the netgate resetting sessions/connections??

  • LAYER 8 Global Moderator

    Pfsense doesn't just reset its connection on a offer ;) Nor would dhcpd send out offer unless it saw a discover or request.

    My guess is your wan is being saturated, you loose your monitor to your gateway - and you have pfsense set to reset everything when that happens.

    If your wan becomes full just turn off restarting states on loss of gateway.

  • @johnpoz I've set the monitor of gateway to NOT action on actions, but it appears that something is happening, extreme lag is occurring on my connection:
    Oct 1 21:55:24 dpinger WAN_DHCP Alarm latency 9423us stddev 1594us loss 21%
    Oct 1 21:56:42 dpinger WAN_DHCP Clear latency 9486us stddev 1748us loss 5%
    Oct 1 21:57:19 dpinger WAN_DHCP Alarm latency 9482us stddev 1888us loss 21%
    Oct 1 21:59:13 dpinger WAN_DHCP Clear latency 9955us stddev 3258us loss 5%
    Oct 1 22:00:09 dpinger WAN_DHCP Alarm latency 9197us stddev 2324us loss 21%
    Oct 1 22:01:39 dpinger WAN_DHCP Clear latency 11927us stddev 5882us loss 5%

    NOt sure what else I need to tweak. My Traffer shaper upload has been set to 7MB/s out of 10MB/s. Still seeing laging, but no disconnections.

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