Router unreachable after roughly 1 day (TP-Link WR841N v8)

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miltan
DD-WRT Novice


Joined: 29 Nov 2017
Posts: 9

PostPosted: Wed Nov 29, 2017 4:16    Post subject: Router unreachable after roughly 1 day (TP-Link WR841N v8) Reply with quote
Some time ago I flashed DDWRT on my router to connect it as a client to a WPA2-ENT network for better connectivity. So far so good, recently however, my router seems to have trouble connecting to the network (idk maybe the Enterprise network kicks all client after a period of 1 day). When I tried to reconnect to the network automatically, I couldn't access the router page; I got the error that the address was unreachable. I got similar result when pinging the router. I always have to reset my router and restore it to the configurations I had before.
Since this behaviour started not too long ago, I'm starting to think it has something to do with turning my router off at times when it's not in use, but since I noticed it always happens after a period of 1 day I doubt that.
Appreciate any help!
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ian5142
DD-WRT Guru


Joined: 23 Oct 2013
Posts: 2318
Location: Canada

PostPosted: Wed Nov 29, 2017 4:24    Post subject: Keep Alive Reply with quote
What do you mean reset it?

There is a difference between reset and reboot.
You may have to reboot it, if it loses connections to the main router.

I would suggest putting a Connection watchdog in, say 300 or 1000 seconds, with the ip of the main router, or even just a DNS server. (Admin then Keep Alive Tab)

Make sure you are on the latest build, at this time 33772.

_________________
Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings


Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.

Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS

Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
miltan
DD-WRT Novice


Joined: 29 Nov 2017
Posts: 9

PostPosted: Wed Nov 29, 2017 4:42    Post subject: Re: Keep Alive Reply with quote
ian5142 wrote:
What do you mean reset it?

There is a difference between reset and reboot.
You may have to reboot it, if it loses connections to the main router.

I would suggest putting a Connection watchdog in, say 300 or 1000 seconds, with the ip of the main router, or even just a DNS server. (Admin then Keep Alive Tab)

Make sure you are on the latest build, at this time 33772.

I hard reset it using the button on the router, meaning I got everything set back to factory settings. Btw, it just happened again: I remember resetting the router at the same time yesterday, and after exactly 24 hours I can't access the router page, since it says "address unreachable". Im running on 33555 at the moment, but I doubt that upgrading will solve my issue. (I say that because I had an older firmware before and just upgraded recently)
ian5142
DD-WRT Guru


Joined: 23 Oct 2013
Posts: 2318
Location: Canada

PostPosted: Wed Nov 29, 2017 4:55    Post subject: Reset Reply with quote
If you reset it, the ip address goes back to default of 192.168.1.1. It should ask you to change your username and password.

Whatever you do, do not upload a backup of the settings. Add in all of your settings manually, by hand.

I would still suggest upgrading, I know one of those relatively recent builds was not very stable, 33772 is. My routers are all >4 days uptime currently.

_________________
Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings


Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.

Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS

Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
miltan
DD-WRT Novice


Joined: 29 Nov 2017
Posts: 9

PostPosted: Wed Nov 29, 2017 5:05    Post subject: Re: Reset Reply with quote
ian5142 wrote:
If you reset it, the ip address goes back to default of 192.168.1.1. It should ask you to change your username and password.

Whatever you do, do not upload a backup of the settings. Add in all of your settings manually, by hand.

I would still suggest upgrading, I know one of those relatively recent builds was not very stable, 33772 is. My routers are all >4 days uptime currently.

Yes, I haven't changed the default of 192.168.1.1 and it does ask me for a new username and password. Any particular reason why I should enter all setting manually? Although I doubt that upgrading will change anything, I'll give it a go.
ian5142
DD-WRT Guru


Joined: 23 Oct 2013
Posts: 2318
Location: Canada

PostPosted: Wed Nov 29, 2017 14:38    Post subject: restore using Backup Reply with quote
It is a bad idea to restore settings via a backup file because you are literally overwriting the current settings. It makes the reset useless. If you input the settings manually, then the at least part of the settings are still default (the ones you didn't change).
_________________
Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings


Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.

Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS

Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
miltan
DD-WRT Novice


Joined: 29 Nov 2017
Posts: 9

PostPosted: Wed Nov 29, 2017 15:32    Post subject: Re: restore using Backup Reply with quote
ian5142 wrote:
It is a bad idea to restore settings via a backup file because you are literally overwriting the current settings. It makes the reset useless. If you input the settings manually, then the at least part of the settings are still default (the ones you didn't change).

I see your point, but the only setting that are saved in that backup file are the client log-in credentials.
Alozaros
DD-WRT Guru


Joined: 16 Nov 2015
Posts: 6410
Location: UK, London, just across the river..

PostPosted: Wed Nov 29, 2017 16:56    Post subject: Re: restore using Backup Reply with quote
miltan wrote:
ian5142 wrote:
It is a bad idea to restore settings via a backup file because you are literally overwriting the current settings. It makes the reset useless. If you input the settings manually, then the at least part of the settings are still default (the ones you didn't change).

I see your point, but the only setting that are saved in that backup file are the client log-in credentials.


well, this is what you believe, but actually is not like that...

_________________
Atheros
TP-Link WR740Nv1 ---DD-WRT 55179 WAP
TP-Link WR1043NDv2 -DD-WRT 55303 Gateway/DoT,Forced DNS,Ad-Block,Firewall,x4VLAN,VPN
TP-Link WR1043NDv2 -Gargoyle OS 1.15.x AP,DNS,QoS,Quotas
Qualcomm-Atheros
Netgear XR500 --DD-WRT 55460 Gateway/DoH,Forced DNS,AP Isolation,4VLAN,Ad-Block,Firewall,Vanilla
Netgear R7800 --DD-WRT 55460 Gateway/DoT,AD-Block,Forced DNS,AP&Net Isolation,x3VLAN,Firewall,Vanilla
Netgear R9000 --DD-WRT 55363 Gateway/DoT,AD-Block,AP Isolation,Firewall,Forced DNS,x2VLAN,Vanilla
Broadcom
Netgear R7000 --DD-WRT 55460 Gateway/SmartDNS/DoH,AD-Block,Firewall,Forced DNS,x3VLAN,VPN
NOT USING 5Ghz ANYWHERE
------------------------------------------------------
Stubby DNS over TLS I DNSCrypt v2 by mac913
miltan
DD-WRT Novice


Joined: 29 Nov 2017
Posts: 9

PostPosted: Thu Nov 30, 2017 6:22    Post subject: Re: restore using Backup Reply with quote
Alozaros wrote:
miltan wrote:
ian5142 wrote:
It is a bad idea to restore settings via a backup file because you are literally overwriting the current settings. It makes the reset useless. If you input the settings manually, then the at least part of the settings are still default (the ones you didn't change).

I see your point, but the only setting that are saved in that backup file are the client log-in credentials.


well, this is what you believe, but actually is not like that...

Ok, well I did it this time setting it up manually and the problem still persists.
ramblin
DD-WRT User


Joined: 03 Nov 2015
Posts: 316
Location: Florida, USA

PostPosted: Thu Nov 30, 2017 17:13    Post subject: Reply with quote
I have said this before. I have at least a dozen WR841NDs and only one ver.8 because the ver.8 is problematic. Very few issues with ver.9 and up.
ian5142
DD-WRT Guru


Joined: 23 Oct 2013
Posts: 2318
Location: Canada

PostPosted: Thu Nov 30, 2017 17:28    Post subject: V8 Reply with quote
I have no problems with my 841ND V8. It is very stable, or at least just as stable as my Archer C7 v2 and my host of other routers.

Nothing can touch a DIR-615 E3 or C1 for uptime though, I had several of those not reboot for several months. If you want a stable router and don't mind sacrificing speed, one of those is the way to go.

_________________
Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings


Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.

Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS

Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
miltan
DD-WRT Novice


Joined: 29 Nov 2017
Posts: 9

PostPosted: Fri Dec 01, 2017 4:06    Post subject: Reply with quote
Hmm, so there is no solution? On reddit someone pointed out that it could have been due to "key rotation"
ian5142
DD-WRT Guru


Joined: 23 Oct 2013
Posts: 2318
Location: Canada

PostPosted: Sat Dec 02, 2017 16:17    Post subject: Solution Reply with quote
I offered a solution. Set up a Connection Watchdog on the router running dd-wrt. Admin - Keep Alive tab. Put in the ip of the main router and 300 or 1000 seconds. This will reboot the secondary router whenever it loses a connection to the main router.
_________________
Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings


Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.

Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS

Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
miltan
DD-WRT Novice


Joined: 29 Nov 2017
Posts: 9

PostPosted: Mon Dec 04, 2017 3:53    Post subject: Re: Solution Reply with quote
ian5142 wrote:
I offered a solution. Set up a Connection Watchdog on the router running dd-wrt. Admin - Keep Alive tab. Put in the ip of the main router and 300 or 1000 seconds. This will reboot the secondary router whenever it loses a connection to the main router.

I don't have a secondary router.
ian5142
DD-WRT Guru


Joined: 23 Oct 2013
Posts: 2318
Location: Canada

PostPosted: Mon Dec 04, 2017 14:20    Post subject: Secondary Router Reply with quote
Sorry, I misread the first post.

Set up the connection watchdog on the 841nd v8. Point it to either the modem or a dns server such as 8.8.8.8 (Google DNS) or 208.67.222.222 (OpenDNS). This will reboot the router if it loses connection to the internet. This is not necessarily the best way to do this.

_________________
Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings


Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.

Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS

Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
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