I think the issue is that 'dhcp-option DNS.' Only takes ONE IP address argument, not two. 2.3 ignored the second argument, 2.4 complains.So you need to change the server side to readpush 'dhcp-option DNS 10.20.220.15'push 'dhcp-option DNS 10.20.220.11'where it reads todaypush 'dhcp-option DNS 10.20.220.15 10.20.220.11'(Yes, this is a bit annoying right now, but the config was wrong all the time and we just never pointed that out)Please test and report back - I'm confident this will fix it. Replying to:push dhcp-option DNS 10.13.0.1This option work on openvpn 2.3.14. But not work on the openvpn 2.4.0, what happens?It does not work in 2.3.14, but the 'not working' bit is not so obvious - you need tohave quotes around the arguments to push (if there are spaces)push 'dhcp-option DNS 10.13.0.1'if you look closely at your 2.3.14 logs, you'll see that it will push the option 'dhcp-option', not 'dhcp-option DNS 10.30.0.1' - push takes one argument, and used to ignore the rest, while in 2.4.0, we actually tell people that there are too many arguments. Replying to:Replying to:push dhcp-option DNS 10.13.0.1This option work on openvpn 2.3.14.
Alternative: OpenVPN open source Tunnelblick program. The open source project has a client for the macOS operating system as well. It is called Tunnelblick and it is less limited in functionality than the OpenVPN Connect Client because it does support the option to connect to multiple OpenVPN servers at the same time. DHCP requires a link layer which doesn't really exist for VPN clients. Usually, a routed VPN connection is used and the VIPAP pool is used instead of the non-existent DHCP pool. With a bridged VPN connection, the VPN client uses an address in the same subnet as the VPN server. However, the bridge is not fully functional and DHCP doesn't work - the server uses proxy ARP.
But not work on the openvpn 2.4.0, what happens?It does not work in 2.3.14, but the 'not working' bit is not so obvious - you need tohave quotes around the arguments to push (if there are spaces)push 'dhcp-option DNS 10.13.0.1'if you look closely at your 2.3.14 logs, you'll see that it will push the option 'dhcp-option', not 'dhcp-option DNS 10.30.0.1' - push takes one argument, and used to ignore the rest, while in 2.4.0, we actually tell people that there are too many arguments.thanks! I'm using OpenVPN 2.4.4 on Ubuntu 18.04 and connecting using MacOS and iPhone. Internal IP addresses work but not the internal DNS service which is running on the same machine as OpenVPN. I have have tried adding push 'dhcp-option DNS 10.0.1.2' (10.0.1.2 is IP where DNS is running) but OenVPN clients still do not resolve to internal names. Without VPN on the same network - both clients work properly. What's additional step required?
I prefer to make changes on server side and not the client side.
Sections of the type dnsmasq specify per dnsmasq instance the values and options relevant to the overall operation of the dnsmasq instance and the DHCP options on all interfaces served.The following table lists all available options, their default value, as well as the corresponding dnsmasq command line option.See for further details.These are the default settings for the common options:# uci -N show dhcp.@dnsmasq0dhcp. @dnsmasq 0 =dnsmasqdhcp. @dnsmasq 0.domainneeded= '1'dhcp.
@dnsmasq 0.boguspriv= '1'dhcp. @dnsmasq 0.filterwin2 k= '0'dhcp. @dnsmasq 0.localisequeries= '1'dhcp. @dnsmasq 0.rebindprotection= '1'dhcp. @dnsmasq 0.rebindlocalhost= '1'dhcp. @dnsmasq 0.local= '/lan/'dhcp.
@dnsmasq 0.domain= 'lan'dhcp. @dnsmasq 0.expandhosts= '1'dhcp. @dnsmasq 0.nonegcache= '0'dhcp. @dnsmasq 0.authoritative= '1'dhcp. @dnsmasq 0.readethers= '1'dhcp.
@dnsmasq 0.leasefile= '/tmp/dhcp.leases'dhcp. @dnsmasq 0.resolvfile= '/tmp/resolv.conf.auto'dhcp. @dnsmasq 0.nonwildcard= '1'dhcp.
@dnsmasq 0.localservice= '1'Options:. NameTypeDefaultOptionDescriptionaddlocaldomainboolean1Add the local domain as search directive in resolv.conf.addlocalhostnameboolean1Add A, AAAA, and PTR records for this router only on DHCP served LAN. Enhanced function available on Trunk with option addlocalfqdnaddlocalfqdninteger1Add A, AAAA, and PTR records for this router only on DHCP served LAN. Addlocalfqdn on Trunk but not 17.01.0 0: Disable. 1: Hostname on Primary Address. 2: Hostname on All Addresses.
3: FDQN on All Addresses. 4: iface.host.domain on All Addresses. Addlocalfqdn on Trunk but not 17.01.0addwanfqdninteger0Labels WAN interfaces like addlocalfqdn instead of your ISP assigned default which may be obscure. WAN is inferred from config dhcp sections with option ignore 1 set, so they do not need to be named WAN addwanfqdn on Trunk but not 17.01.0addnhostslist of file paths(none)-HAdditional host files to read for serving DNS responses.
Syntax in each file is the same as /etc/hostsauthoritativeboolean1-KForce dnsmasq into authoritative mode. This speeds up DHCP leasing. Used if this is the only server on the networkbogusnxdomainlist of IP addresses(none)-BIP addresses to convert into NXDOMAIN responses (to counteract “helpful” upstream DNS servers that never return NXDOMAIN).bogusprivboolean1-bReject reverse lookups to private IP ranges where no corresponding entry exists in /etc/hostscachelocalboolean1When set to 0, use each network interface's dns address in the local /etc/resolv.conf. Normally, only the loopback address is used, and all queries go through dnsmasq.cachesizeinteger150-cSize of dnsmasq query cache.dbusboolean0-1Enable DBus messaging for dnsmasq. Standard builds of dnsmasq on OpenWrt do not include DBus support.dhcpbootstring(none)-dhcp-bootSpecifies BOOTP options, in most cases just the file name. You can also use: “ file name, tftp server name, tftp ip address“dhcphostsfilefile path(none)-dhcp-hostsfileSpecify an external file with per host DHCP optionsdhcpleasemaxinteger150-XMaximum number of DHCP leasesdnsforwardmaxinteger150-0 (zero)Maximum number of concurrent connectionsdomaindomain name(none)-sDNS domain handed out to DHCP clientsdomainneededboolean1-DTells dnsmasq never to forward queries for plain names, without dots or domain parts, to upstream nameservers. If the name is not known from /etc/hosts or DHCP then a “not found” answer is returneddnssecboolean0-dnssecValidate DNS replies and cache DNSSEC data.
Requires the dnsmasq-full package.dnsseccheckunsignedboolean0-dnssec-check-unsignedCheck the zones of unsigned replies to ensure that unsigned replies are allowed in those zones. This protects against an attacker forging unsigned replies for signed DNS zones, but is slower and requires that the nameservers upstream of dnsmasq are DNSSEC-capable. Requires the dnsmasq-full package. Sections of the type dhcp specify per interface lease pools and settings for serving DHCP requests.Typically there is at least one section of this type present in the /etc/config/dhcp file to cover the lan interface.You can disable a lease pool for a specific interface by specifying the ignore option in the corresponding section.A minimal example of a dhcp section is listed below:# uci -N show dhcp.@dhcp0dhcp.
@dhcp 0 =dhcpdhcp. @dhcp 0.interface= 'lan'dhcp.
@dhcp 0.start= '100'dhcp. @dhcp 0.limit= '150'dhcp. @dhcp 0.leasetime= '12h'. NameTypeRequiredDefaultDescriptiondhcpoptionlist of stringsno(none)The ID dhcpoption here must be with written with an underscore.
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OpenWrt will translate this to -dhcp-option, with a hyphen, as ultimately used by dnsmasq. Multiple option values can be given for this network-id, with a a space between them and the total string between ””. '26,1470' or 'option:mtu, 1470' that can assign an MTU per DHCP.
Your client must accept MTU by DHCP for this to work. Or “3,192.168.1.1 6,192.168.1.1” to give out gateway and dns server addresses.
A list of options can be found here. A list of the symbolic option names that dnsmasq recognises can be found by running dnsmasq -help dhcp.dhcpoptionforcelist of stringsno(none)Exactly the same as dhcpoption (note the underscores), but it will be translated to -dhcp-option-force, meaning that the DHCP option will be sent regardless on whether the client requested it. NameTypeRequiredDefaultDescriptionipstringyes(none)'ignore' or the IP address to be used for this host.macstringno(none)The hardware address(es) of this host, separated by spaces.hostidstringno(none)The IPv6 interface identifier (address suffix) as hexadecimal number (max.
8 chars)duidstringno(none)The DHCPv6-DUID of this host.namestringno(none)Optional hostname to assign.tagstringno(none)Set the given tag for matching hosts.dnsbooleanno0Add static forward and reverse DNS entries for this host.broadcastbooleanno0Force broadcast DHCP response.leasetimestringno(none)Host-specific lease time, e.g. Note: introduced by r48801 in trunkinstancednsmasq instanceno(none)Dnsmasq instance to which the host section is bound; if not specified the section is valid for all dnsmasq instances.As well as adding host sections, you can also enable the dnsmasq section option readethers, and add entries to the /etc/ethers file.Booting options. NameTypeRequiredDefaultDescriptiondhcpoptionlist of stringsno(none)Additional options to be added for this network-id. If you specify this, you also need to specify the network-id.filenamestringyes(none)The filename the host should request from the boot server.networkidstringno(none)The network-id these boot options should apply to. Applies to all clients if left unspecified.serveraddressstringyes(none)The IP address of the boot server.servernamestringyes(none)The hostname of the boot server.forceboolno(none)dhcpoption will always be sent, even if the client does not ask for it in the parameter request list. This is sometimes needed, for example when sending options to PXELinux.instancednsmasq instanceno(none)Dnsmasq instance to which the boot section is bound. If not specified the section is valid for all dnsmasq instances.Classifying clients and assigning individual options.
NameDescriptionmacHardware address of the client.tagAn alphanumeric label which marks the network.vendorclassString sent by the client representing the vendor of the client. Dnsmasq performs a substring match on the vendor class string using this value.userclassString sent by the client representing the user of the client. Dnsmasq performs a substring match on the user class string using this value.circuitidMatches the circuit ID as sent by the relay agent, as defined in RFC3046.remoteidMatches the remote ID as sent by the relay agent, as defined in RFC3046.subscridMatches the subscriber ID as sent by the relay agent, as defined in RFC3993.Each classifying section has two configuration options: the value of the DHCP option used to distinguish clients, and the network-id that these clients should be tagged with. NameTypeRequiredDefaultDescriptionclassifierstringyes(none)Use section type as option name and classifying filter as option value.dhcpoptionlist of stringsno(none)Additional options to be added for this network-id. If you specify this, you also need to specify the network-id.networkidstringno(none)The network-id the classifier should apply to. Applies to all clients if left unspecified.Section tag must be named, doesn't require option classifier and can include a list of dhcpoption and option force.