Can't Connect to Internet

Post new topic   Reply to topic    DD-WRT Forum Index -> Broadcom SoC based Hardware
Author Message
valleybowline
DD-WRT Novice


Joined: 27 Jan 2023
Posts: 3

PostPosted: Fri Jan 27, 2023 19:09    Post subject: Can't Connect to Internet Reply with quote
Hi,

I had a Netgear Nighthawk R6700v3 router running DD-WRT v3.0-r49418 std (07/04/22) connected directly to a fiber optic connection and it worked fine.

I moved and got cable internet. The cable internet works fine with the modem through a TP-Link Archer C7 router.

However, when I connect the DD-WRT router to the modem, I can access the router from my PC, but the router does not have an internet connection.

Thanks
Sponsor
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 12837
Location: Netherlands

PostPosted: Fri Jan 27, 2023 19:19    Post subject: Reply with quote
I will move this thread to a more appropriate forum.

See the forum guidelines with helpful tips: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087

Try the following:
Reset router to defaults.
On setup page change Local IP Address from 192.168.1.1 in 192.168.20.1

_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
valleybowline
DD-WRT Novice


Joined: 27 Jan 2023
Posts: 3

PostPosted: Fri Jan 27, 2023 21:07    Post subject: Reply with quote
Thanks. Neither of those worked. It's still the same.
Alozaros
DD-WRT Guru


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

PostPosted: Fri Jan 27, 2023 21:17    Post subject: Reply with quote
well... you have to start with exposing you setup and giving us more details..as many as you can...post pic's of Basic Setup page and Services page and Status>WAN page...
you can cover the sensitive data like IP, MAC's and ect.

Does your router gets an IP form the modem...what interface is the modem providing, dynamic DHCP, Static IP, PPPoE...and ect. do you have an IPv6 address given by the modem....some ISP's require VLAN ID, some bound their IP's to specific MAC address...so, far many details are missing..

If you have IP do you have a working DNS...try to add to DNSmasq those 2 lines (click save & apply)

no-resolv
server=9.9.9.9

-first line will tell DNSmasq to ignore any other DNS's (like those that could be fetched by your ISP to the stack)
-second line are the DNS servers you want to use...you can add as many as you like...

_________________
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
valleybowline
DD-WRT Novice


Joined: 27 Jan 2023
Posts: 3

PostPosted: Fri Jan 27, 2023 22:08    Post subject: Reply with quote
Sorry, I have very limited knowledge of this. I have attached pictures of those pages.

The modem is a Motorola MB7621, and the ISP is Comcast Xfinity. I had to register the MAC address of the modem with Comcast to activate the service, but I did not enter anything or make any changes to the TP Link router for it to work.

I do not believe the router is getting an IP from the modem, but am not sure.



Serv1.PNG
 Description:
 Filesize:  27.16 KB
 Viewed:  921 Time(s)

Serv1.PNG



W.PNG
 Description:
 Filesize:  20.18 KB
 Viewed:  921 Time(s)

W.PNG



Bas.PNG
 Description:
 Filesize:  29.99 KB
 Viewed:  921 Time(s)

Bas.PNG


kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 14126
Location: Texas, USA

PostPosted: Fri Jan 27, 2023 23:06    Post subject: Reply with quote
Try a hard reset and assigning local IP that is outside of the upstream router's IP subnet. Something tells me some nvram gremlins from your fiber configuration (which was PPPoE?) are mucking things up, unless the ISP router's LAN ports are disabled...
_________________
"Life is but a fleeting moment, a vapor that vanishes quickly; All is vanity"
Contribute To DD-WRT
Pogo - A minimal level of ability is expected and needed...
DD-WRT Releases 2023 (PolitePol)
DD-WRT Releases 2023 (RSS Everything)

----------------------
Linux User #377467 counter.li.org / linuxcounter.net
Display posts from previous:    Page 1 of 1
Post new topic   Reply to topic    DD-WRT Forum Index -> Broadcom SoC based Hardware All times are GMT

Navigation

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum