Asus 4G-AC55U - Script running each hour disconnecting vpn clients

[lasse stupforsmo]

Hi all, first time poster here.

I have discovered a problem with my new 4G-AC55U router from Asus and I hope that some of you tech guys can help me out locating the problem. And how to fix it

The router works perfectly when it comes to stable LTE connections and such...but there is one thing I still don't understand, somehow the routing table gets applied 1 time every hour, disconnecting all VPN clients (Running VPN server on the Asus) for 2-4minutes each hour.




Here's a copy paste from the system log:
Feb 21 04:59:55 start_nat_rules: apply the nat_rules(/tmp/nat_rules_usb0_usb0)!
Feb 21 04:59:55 wan: finish adding multi routes
Feb 21 04:59:56 rc_service: udhcpc 25265:notify_rc stop_upnp
Feb 21 04:59:56 miniupnpd[7114]: shutting down MiniUPnPd
Feb 21 04:59:57 ntp: start NTP update
Feb 21 04:59:57 rc_service: udhcpc 25265:notify_rc start_upnp
Feb 21 04:59:57 miniupnpd[25601]: version 1.9 started
Feb 21 04:59:57 miniupnpd[25601]: HTTP listening on port 41484
Feb 21 04:59:57 miniupnpd[25601]: Listening for NAT-PMP/PCP traffic on port 5351
Feb 21 04:59:58 ddns update: ez-ipupdate: starting...
Feb 21 04:59:59 ddns update: connected to members.dyndns.org (204.13.248.111) on port 80.
Feb 21 04:59:59 ddns update: members.dyndns.org says that your IP address has not changed since the last update
Feb 21 04:59:59 ddns update: asusddns_update: 0
Feb 21 04:59:59 ddns: ddns update ok
Feb 21 04:59:59 dhcp client: bound 77.18.154.113 via 77.18.154.113 during 7200 seconds.
Feb 21 04:59:59 ntp: start NTP update

And here is after another hour:
Feb 21 05:59:59 start_nat_rules: apply the nat_rules(/tmp/nat_rules_usb0_usb0)!
Feb 21 05:59:59 wan: finish adding multi routes
Feb 21 06:00:00 login[10439]: invalid password for 'admin' on 'pts/0'
Feb 21 06:00:00 rc_service: udhcpc 11095:notify_rc stop_upnp
Feb 21 06:00:00 miniupnpd[25601]: shutting down MiniUPnPd
Feb 21 06:00:01 rc_service: udhcpc 11095:notify_rc start_upnp
Feb 21 06:00:02 miniupnpd[11289]: version 1.9 started
Feb 21 06:00:02 miniupnpd[11289]: HTTP listening on port 52988
Feb 21 06:00:02 miniupnpd[11289]: Listening for NAT-PMP/PCP traffic on port 5351
Feb 21 06:00:02 ntp: start NTP update
Feb 21 06:00:03 ddns update: ez-ipupdate: starting...
Feb 21 06:00:03 ddns update: connected to members.dyndns.org (204.13.248.111) on port 80.
Feb 21 06:00:03 ddns update: members.dyndns.org says that your IP address has not changed since the last update
Feb 21 06:00:03 ddns update: asusddns_update: 0
Feb 21 06:00:03 ddns: ddns update ok
Feb 21 06:00:03 dhcp client: bound 77.18.154.113 via 77.18.154.113 during 7200 seconds.
Feb 21 06:00:03 ntp: start NTP update


Also, in the WAN screen under Connection Info, the timer for connection time resets after it has past 1 hour, at the same time the script from the system log runs. See screenshow below:

The clock don't have anything to do with the resets afaik, as If I were to manually restart the router at ex: 1630, it would still run the script at 1730. The pattern is 1 time each hour after last reboot/restart.


I called asus support, and they told me to turn the group key rotation interval on the Wifi setting to zero. I tried it but still no change.

I have tried several APN from my ISP but it doesn't help, this is a router based problem.

When I ping the WAN-IP from the outside, there is no loss when the router starts the script, so its only affecting the internal clients withing the router network.

Running stock firmware:
Operation Mode:Wireless router Firmware Version:3.0.0.4.378_8150


Is there a way to disable that script that runs on the asus? Because losing 3-4mins connection time every hour results in 96min each day, which I find very frustrating.

 

[ColinTaylor]

I don't think this is a problem with the router as such. This line

Feb 21 04:59:59 dhcp client: bound 77.18.154.113 via 77.18.154.113 during 7200 seconds.

suggests that your ISP is giving you a lease time of 2 hours. DHCP clients will normally renew their lease half way through the lease time.

 

[lasse stupforsmo]

Hey Colin,

But still with a stable WAN connection and a Local connection with no drops...I find it strange that the VPN server disconnects all the clients.

I pinged from an external IP to the WAN IP of the router, no drops while that dhcp client bound to the ip address.
I pinged from a local lan computer connected to the asus router to an external IP without any drops in communication.

So it seems like its a VPN server bug in the firmware? Is there anyway to work around that?