Need help with DHCP and DNS Servers

Post new topic   Reply to topic    DD-WRT Forum Index -> Atheros WiSOC based Hardware
View previous topic :: View next topic  
Author Message
VanQ
DD-WRT Novice


Joined: 11 Sep 2019
Posts: 2
PostPosted: Wed Sep 11, 2019 18:18    Post subject: Need help with DHCP and DNS Servers Reply with quote
I have 2 DHCP servers running on the same subnet. 1 of the DHCP servers is WR1043ND V2 running DDWRT build 40559 and i am wondering how will i be able to force the clients connected to this router via wireless or wired to access and connect to this DHCP server instead of the other one. Somehow it reaches the other DHCP server instead of this ddwrt dhcp server. I am using DNSMasq as well.
Back to top View user's profile Send private message
Sponsor
msoengineer
DD-WRT Guru


Joined: 21 Jan 2017
Posts: 1783
Location: Illinois Moderator
PostPosted: Wed Sep 11, 2019 18:21    Post subject: Re: Need help with DHCP and DNS Servers Reply with quote
VanQ wrote:
I have 2 DHCP servers running on the same subnet. 1 of the DHCP servers is WR1043ND V2 running DDWRT build 40559 and i am wondering how will i be able to force the clients connected to this router via wireless or wired to access and connect to this DHCP server instead of the other one. Somehow it reaches the other DHCP server instead of this ddwrt dhcp server. I am using DNSMasq as well.


You can't, you have to specify different ipranges/subnets or you risk exactly the issue you are having. Why are you doing it this way vs having the one router do all dhcp and then the second router acting as a switch/simple AP?
_________________
FORUM RULES

TIPS/TRICKS: Best QCA Wifi Settings | Latency tricks | QoS Port priority | NEVER USE MU-MIMO |
Why to NOT use MU-MIMO | Max Wifi Pwr by Country | Linux Wifi Pwr | AC MCS & AX MCS | QCA 5Ghz chnls to use | WIFI Freq WIKI | TFTP R7800 | Don't buy AX | IPERF3 How-To

[R9000]52396 nightly (Main Router)
[EA8500]43192 & 45493 (2xOffsite)
[R7800] resting
[WDR3600]BS 44715 (Offsite)
[A7v5]BS 43038 (Offsite+spare napping)
Back to top View user's profile Send private message
VanQ
DD-WRT Novice


Joined: 11 Sep 2019
Posts: 2
PostPosted: Wed Sep 11, 2019 18:43    Post subject: Re: Need help with DHCP and DNS Servers Reply with quote
msoengineer wrote:
VanQ wrote:
I have 2 DHCP servers running on the same subnet. 1 of the DHCP servers is WR1043ND V2 running DDWRT build 40559 and i am wondering how will i be able to force the clients connected to this router via wireless or wired to access and connect to this DHCP server instead of the other one. Somehow it reaches the other DHCP server instead of this ddwrt dhcp server. I am using DNSMasq as well.


You can't, you have to specify different ipranges/subnets or you risk exactly the issue you are having. Why are you doing it this way vs having the one router do all dhcp and then the second router acting as a switch/simple AP?


Its cause the first router i have to have it as it is required by my ISP and also i require it for Wifi to cover a certain area. this router does not have a dhcp forwarder as well. As for the ddwrt router i am using it as i have openvpn server and for me to redirect traffic to my local dns server (the ISP provided one dosent allow to change DNS). Is there any possible way for me redirect all dns traffic from my first router?
Back to top View user's profile Send private message
Alozaros
DD-WRT Guru


Joined: 16 Nov 2015
Posts: 6440
Location: UK, London, just across the river..
PostPosted: Wed Sep 11, 2019 19:14    Post subject: Reply with quote
so...not very clear what you want to achieve may be
draw a pic or try another way..

did you change the 1034v2 GUI IP to something like
192.168.3.1 first, so its not on the same subnet like ISP router?

lets suppose, first is a ISP modem router Wi-Fi...than how your Wi-Fi clients get connected if there is no DHCP ??...
than the second router is your DDWRT (1043v2)...

and third you are concerned that the ISP is forcing your DNS...

Are you connected to ISP modem/router only via WiFi ??

If not the only option is to use encrypted DNS that is not using port 53 bt but 853(tls) or 443 (https)..or
even DNScypt..for all that you'd need your 1043v2 to be running NAT (Gateway mode) and
DNSmasq for DNS and DHCP..& Forced DNS ...so called standard configuration...

Check my signature there are 2 links how to use deploy/use stubby for DNS over Tls...
and about DNSCrypt too...in that way you will go around your ISP forced DNS...

if you meant something else, than im out.. i just didn't get you right..
_________________
Atheros
TP-Link WR740Nv1 ---DD-WRT 55630 WAP
TP-Link WR1043NDv2 -DD-WRT 55723 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 55779 Gateway/DoH,Forced DNS,AP Isolation,4VLAN,Ad-Block,Firewall,Vanilla
Netgear R7800 --DD-WRT 55819 Gateway/DoT,AD-Block,Forced DNS,AP&Net Isolation,x3VLAN,Firewall,Vanilla
Netgear R9000 --DD-WRT 55779 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
Back to top View user's profile Send private message
Display posts from previous:    Page 1 of 1
Post new topic   Reply to topic    DD-WRT Forum Index -> Atheros WiSOC 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 cannot attach files in this forum
You cannot download files in this forum