Do you have the same IP addresses on those interfaces? anyway, it seems to be implemented already. Check --server in man dnsmasq(8).
--server=10.1.2.3@ethX I am not sure it just uses source IP address from that interface or it can differentiate the same IP addresses on different interfaces. Please try and share results. On 9/23/20 11:16 PM, Hooman wrote: > Hi Petr, > > Thank you for your response. I am actually looking for a way to forward > packets to a specific interface. The DNS servers on all these interfaces > are the same, so I can't use the method you mentioned in your response. > > I am looking for something similar to the `ping -I interface` option [1] > that sets the source IP address (or interface) for the ping packets. > > Thank you, > > -H > > > [1] https://linux.die.net/man/8/ping > > On 9/23/20 2:47 PM, Petr Menšík wrote: >> Hi, >> >> I doubt there is simple way to forward to "interface". DNS queries needs >> target IP to forward to. You would need >> dnsmasq ... --no-resolv --server=<ethX forwarder IP> >> >> I just guess you want to use DNS server configured by DHCP on given >> ethernet interface. I doubt it is possible to integrate directly into >> dnsmasq. It is not DHCP client, but DHCP server. You would have to find >> a way to obtain DNS settings for given interface and prepare >> configuration snippet for dnsmasq. >> >> With fixed IP addresses, it would be much easier :), just use different >> --server on each instance. >> >> Cheers, >> Petr >> >> On 9/23/20 8:13 PM, Hooman wrote: >>> Hi, >>> >>> I am using `hostapd` to setup WiFi hotspot networks on my Ubuntu 18.04. >>> I am using [this guide][1] to setup multiple SSIDs on my WiFi interface. >>> And to enable DHCP on the hotspot networks, I use `dnsmasq`. >>> >>> I run a separate instance of `dnsmasq` for each SSID. Now, I have >>> multiple Ethernet interfaces available on this computer and I want each >>> `dnsmasq` instance to forward the DNS requests it receives on a >>> different Ethernet interface. >>> >>> Is there an easy way to do this? In other words, is there a way to tell >>> `dnsmasq` which Ethernet interface to use for forwarding DNS queries? I >>> know that in theory I can use network namespaces to do this, but I'm >>> looking for an easier way. >>> >>> Thank you! >>> >>> -H >>> >>> >>> [1]: http://wiki.stocksy.co.uk/wiki/Multiple_SSIDs_with_hostapd >>> >>> >>> _______________________________________________ >>> Dnsmasq-discuss mailing list >>> Dnsmasq-discuss@lists.thekelleys.org.uk >>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss >>> > -- Petr Menšík Software Engineer Red Hat, http://www.redhat.com/ email: pemen...@redhat.com PGP: DFCF908DB7C87E8E529925BC4931CA5B6C9FC5CB
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