[Dnsmasq-discuss] Question about the behavior of options 66 and 67
One of our users ran into an interesting issue. They have IP phones that explicitly request options 66 and 67 as part of their DHCP Parameter Request List of the DISCOVER/REQUEST, but still expect the resultant OFFER/ACK to return those values in the “sname” and “file” fields (within the “bootp” portion of the packet), rather than as DHCP Options. (I guess they don’t care if the response also contains them as Options, but they definitely only look for these values in the sname and file fields). Dnsmasq seems to behave differently: if the client asks for 66 or 67, they always get them back as DHCP Options (and sname and file are left empty); if they don’t ask (but the server is configured for these options), then dnsmasq stuffs them into the “sname” and “file” fields. (Other vendors they use, however - like Cisco Meraki and Aricent - seem to behave the way I described in the previous paragraph.) Is this a deliberate choice? Is there any way to get dnsmasq to do what these IP phones seem to expect (i.e. always stuff options 66 and 67 into sname and file, regardless of whether they are asked for as DHCP options)? Thanks in advance! - -- Shankar ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] local dns broke
adding domain=home helped sort of. I can now resolve other names on my lan, but still not pc8. pc8 is dnsmasq dhcp/dns for my lan, static ip 192.168.1.8 twist is ubunut xenial, seems to work ok dc10b is ubuntu bionic that won't resolve pc8 unless I tell it server 192.168.1.8 before setting domain=home carl@twist:~$ host dc10b dc10b has address 192.168.1.185 carl@twist:~$ host pc8 pc8 has address 192.168.1.8 juser@dc10b:~$ host twist Host twist not found: 2(SERVFAIL) juser@dc10b:~$ host pc8 Host pc8 not found: 2(SERVFAIL) after /etc/dnsmasq.d/local.conf domain=home carl@twist:~$ host dc10b dc10b.home has address 192.168.1.185 carl@twist:~$ host pc8 pc8 has address 192.168.1.8 carl@twist:~$ host pc8.home Host pc8.home not found: 3(NXDOMAIN) juser@dc10b:~$ host twist twist.home has address 192.168.1.199 juser@dc10b:~$ host twist.home twist.home has address 192.168.1.199 juser@dc10b:~$ host pc8 Host pc8 not found: 2(SERVFAIL) juser@dc10b:~$ host pc8.home Host pc8.home not found: 3(NXDOMAIN) juser@dc10b:~$ host pc8 192.168.1.8 Using domain server: Name: 192.168.1.8 Address: 192.168.1.8#53 pc8 has address 192.168.1.8 juser@dc10b:~$ host pc8.home 192.168.1.8 Using domain server: Name: 192.168.1.8 Address: 192.168.1.8#53 Host pc8.home not found: 3(NXDOMAIN) On Tue, Jul 24, 2018 at 3:03 AM, john doe wrote: > On 7/24/2018 7:47 AM, Carl Karsten wrote: >> >> On Tue, Jul 24, 2018 at 12:32 AM, Geert Stappers >> wrote: >>> >>> On Mon, Jul 23, 2018 at 06:02:02PM -0500, Carl Karsten wrote: On Mon, Jul 23, 2018 at 4:16 PM, Geert Stappers wrote: > > > What do the other client fine that the netplan client doesn't do? > resolve local names. xenial box: carl@twist:~$ host pc8 pc8 has address 192.168.1.8 carl@twist:~$ host trist trist has address 192.168.1.156 bionic netplan: juser@dc10b:~$ host pc8 Host pc8 not found: 2(SERVFAIL) juser@dc10b:~$ host trist Host trist not found: 2(SERVFAIL) juser@dc10b:~$ host pc8 192.168.1.8 Using domain server: Name: 192.168.1.8 Address: 192.168.1.8#53 Aliases: pc8 has address 192.168.1.8 juser@dc10b:~$ host trist 192.168.1.8 Using domain server: Name: 192.168.1.8 Address: 192.168.1.8#53 Aliases: trist has address 192.168.1.156 juser@dc10b:~$ cat /run/systemd/resolve/resolv.conf # [comments removed] nameserver 192.168.1.8 juser@dc10b:~$ cat /etc/resolv.conf nameserver 127.0.0.53 >>> >>> >>> >>> My guess is that a domain name is missing, dc10b correct and twist wrong. >> >> >> ah right, I don't have >> domain=something.com >> >> I'm not sure I have gotten a straight answer about if/what domain name >> I should plug in. >> I have no interest of these names resolving outside of my lan, so what >> name should I use? >> > > One of those TLDS (.home' seems reasonable)' > home > internal > intranet > lan > local > private > test > > Also have a look online for private TLDS, there is more to this. > > -- > John Doe > > > ___ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss On Tue, Jul 24, 2018 at 3:03 AM, john doe wrote: > On 7/24/2018 7:47 AM, Carl Karsten wrote: >> >> On Tue, Jul 24, 2018 at 12:32 AM, Geert Stappers >> wrote: >>> >>> On Mon, Jul 23, 2018 at 06:02:02PM -0500, Carl Karsten wrote: On Mon, Jul 23, 2018 at 4:16 PM, Geert Stappers wrote: > > > What do the other client fine that the netplan client doesn't do? > resolve local names. xenial box: carl@twist:~$ host pc8 pc8 has address 192.168.1.8 carl@twist:~$ host trist trist has address 192.168.1.156 bionic netplan: juser@dc10b:~$ host pc8 Host pc8 not found: 2(SERVFAIL) juser@dc10b:~$ host trist Host trist not found: 2(SERVFAIL) juser@dc10b:~$ host pc8 192.168.1.8 Using domain server: Name: 192.168.1.8 Address: 192.168.1.8#53 Aliases: pc8 has address 192.168.1.8 juser@dc10b:~$ host trist 192.168.1.8 Using domain server: Name: 192.168.1.8 Address: 192.168.1.8#53 Aliases: trist has address 192.168.1.156 juser@dc10b:~$ cat /run/systemd/resolve/resolv.conf # [comments removed] nameserver 192.168.1.8 juser@dc10b:~$ cat /etc/resolv.conf nameserver 127.0.0.53 >>> >>> >>> >>> My guess is that a domain name is missing, dc10b correct and twist wrong. >> >> >> ah right, I don't have >> domain=something.com >> >> I'm not sure I have gotten a straight answer about if/what domain name >> I should plug in. >> I have no
Re: [Dnsmasq-discuss] local dns broke
On 7/24/2018 7:47 AM, Carl Karsten wrote: On Tue, Jul 24, 2018 at 12:32 AM, Geert Stappers wrote: On Mon, Jul 23, 2018 at 06:02:02PM -0500, Carl Karsten wrote: On Mon, Jul 23, 2018 at 4:16 PM, Geert Stappers wrote: What do the other client fine that the netplan client doesn't do? resolve local names. xenial box: carl@twist:~$ host pc8 pc8 has address 192.168.1.8 carl@twist:~$ host trist trist has address 192.168.1.156 bionic netplan: juser@dc10b:~$ host pc8 Host pc8 not found: 2(SERVFAIL) juser@dc10b:~$ host trist Host trist not found: 2(SERVFAIL) juser@dc10b:~$ host pc8 192.168.1.8 Using domain server: Name: 192.168.1.8 Address: 192.168.1.8#53 Aliases: pc8 has address 192.168.1.8 juser@dc10b:~$ host trist 192.168.1.8 Using domain server: Name: 192.168.1.8 Address: 192.168.1.8#53 Aliases: trist has address 192.168.1.156 juser@dc10b:~$ cat /run/systemd/resolve/resolv.conf # [comments removed] nameserver 192.168.1.8 juser@dc10b:~$ cat /etc/resolv.conf nameserver 127.0.0.53 My guess is that a domain name is missing, dc10b correct and twist wrong. ah right, I don't have domain=something.com I'm not sure I have gotten a straight answer about if/what domain name I should plug in. I have no interest of these names resolving outside of my lan, so what name should I use? One of those TLDS (.home' seems reasonable)' home internal intranet lan local private test Also have a look online for private TLDS, there is more to this. -- John Doe ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] local dns broke
On Tue, Jul 24, 2018 at 12:32 AM, Geert Stappers wrote: > On Mon, Jul 23, 2018 at 06:02:02PM -0500, Carl Karsten wrote: >> On Mon, Jul 23, 2018 at 4:16 PM, Geert Stappers wrote: >> > >> > What do the other client fine that the netplan client doesn't do? >> > >> >> resolve local names. >> >> xenial box: >> carl@twist:~$ host pc8 >> pc8 has address 192.168.1.8 >> >> carl@twist:~$ host trist >> trist has address 192.168.1.156 >> >> bionic netplan: >> juser@dc10b:~$ host pc8 >> Host pc8 not found: 2(SERVFAIL) >> juser@dc10b:~$ host trist >> Host trist not found: 2(SERVFAIL) >> >> juser@dc10b:~$ host pc8 192.168.1.8 >> Using domain server: >> Name: 192.168.1.8 >> Address: 192.168.1.8#53 >> Aliases: >> pc8 has address 192.168.1.8 >> >> juser@dc10b:~$ host trist 192.168.1.8 >> Using domain server: >> Name: 192.168.1.8 >> Address: 192.168.1.8#53 >> Aliases: >> trist has address 192.168.1.156 >> >> >> juser@dc10b:~$ cat /run/systemd/resolve/resolv.conf >> # [comments removed] >> nameserver 192.168.1.8 >> >> juser@dc10b:~$ cat /etc/resolv.conf >> nameserver 127.0.0.53 > > > My guess is that a domain name is missing, dc10b correct and twist wrong. ah right, I don't have domain=something.com I'm not sure I have gotten a straight answer about if/what domain name I should plug in. I have no interest of these names resolving outside of my lan, so what name should I use? > > > Cheers > Geert Stappers > -- > Yes, discussion order is in chronological order > > ___ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
