[Dnsmasq-discuss] Issues with multiple subnets on dnsmasq
subhranshu dwivedi
subhranshu.dwivedi at erminsystems.com
Tue Sep 4 05:37:24 BST 2012
Thanks Ryan for replying,
I seriously need your help here,
We have dhcp ranges:-
dhcp-range=eth1,172.16.49.101,172.16.49.254,14400
dhcp-range=eth1,172.16.50.1,172.16.50.254,14400
dhcp-range=eth1,172.16.51.101,172.16.51.254,14400
dhcp-range=eth4,172.16.56.20,172.16.56.254,14400
dhcp-range=eth3,172.16.52.21,172.16.53.254,14400
So none of the machines pull the 172.16.48.x ip addresses, however they do
pull other ones like 49/50/51/52/56,apart from 49 series pulled from dhcp
and 48 series if forced manualy, all other can ping 172.16.48.4.
For all the series which we have setup on eth1, i.e
dhcp-range=eth1,172.16.49.101,172.16.49.254,14400
dhcp-range=eth1,172.16.50.1,172.16.50.254,14400
dhcp-range=eth1,172.16.51.101,172.16.51.254,14400
We are trying to setup *172.16.48.4* as gateway, it works fine for 50/51
ips pulled by hosts but, dont work for 49 series,
and subnet which its lying under in vlan is 255.255.252.0
on Untangle
route
-n
[root @ untangle]
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
192.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0
dummy0
192.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 utun
172.16.57.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
172.16.56.0 0.0.0.0 255.255.255.0 U 0 0 0 eth4
172.16.52.0 0.0.0.0 255.255.254.0 U 0 0 0 eth3
172.16.48.0 0.0.0.0 255.255.254.0 U 0 0 0 eth2
172.16.48.0 0.0.0.0 255.255.252.0 U 0 0 0 eth1
ifconfig on host with 50
eth0 Link encap:Ethernet HWaddr 00:18:8b:c3:f2:10
inet addr:172.16.50.235 Bcast:172.16.51.255 Mask:255.255.252.0
inet6 addr: fe80::218:8bff:fec3:f210/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:123102 errors:0 dropped:10 overruns:0 frame:0
TX packets:70439 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:115719183 (115.7 MB) TX bytes:7541314 (7.5 MB)
Interrupt:17
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:3477 errors:0 dropped:0 overruns:0 frame:0
TX packets:3477 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:331477 (331.4 KB) TX bytes:331477 (331.4 KB)
arp -a
? (172.16.48.147) at 00:0c:29:ce:46:7c [ether] on eth0
? (172.16.48.146) at 00:04:23:b0:92:d8 [ether] on eth0
? (172.16.48.4) at 00:04:23:c7:52:62 [ether] on eth0
? (172.16.48.1) at 00:1a:a2:24:73:c1 [ether] on eth0
Please suggest.
On Mon, Sep 3, 2012 at 10:28 PM, Ryan Chapman <ryan at heatery.com> wrote:
> On the host that pulls a 172.16.48 address, try a ping of 172.16.48.4 and
> then check the arp table to make sure it resolved to a hardware address.
> If not, tcpdump arp traffic.
>
> It might be interesting to see what an ifconfig, "route -n" and "arp -a"
> look like on the 172.16.48 host...
>
>
> On Sep 3, 2012, at 7:29 AM, subhranshu dwivedi <
> subhranshu.dwivedi at erminsystems.com> wrote:
>
> Hi All,
>
> I have Untangle with DNS masq setup at my end,
>
> With interface:
>
> External
> eth0 Link encap:Ethernet HWaddr 00:04:23:c7:52:63
> inet addr:172.16.57.10 Bcast:172.16.57.255 Mask:255.255.255.0
>
> INTERNAL
> eth1 Link encap:Ethernet HWaddr 00:04:23:c7:52:62
> inet addr:172.16.48.4 Bcast:172.16.51.255 Mask:255.255.252.0
> DMZ
> eth2 Link encap:Ethernet HWaddr 00:1b:21:0e:1f:46
> inet addr:172.16.48.110 Bcast:172.16.49.255 Mask:255.255.254.0
>
> Extra ones:
> eth3 Link encap:Ethernet HWaddr fc:75:16:8e:57:2b
> inet addr:172.16.52.20 Bcast:172.16.53.255 Mask:255.255.254.0
>
> eth4 Link encap:Ethernet HWaddr fc:75:16:8e:57:42
> inet addr:172.16.56.2 Bcast:172.16.56.255 Mask:255.255.255.0
>
> Now my dnsmasq.conf,
>
> localise-queries
> server=202.56.224.135 # uplink.1
> server=59.144.127.16 # uplink.1
> expand-hosts
> addn-hosts=/etc/untangle-net-alpaca/dnsmasq-hosts
> no-hosts
> domain=bpl.netlink.com
> interface=eth1
> interface=eth3
> interface=eth4
> dhcp-range=eth1,172.16.49.101,172.16.49.254,14400
> dhcp-range=eth1,172.16.50.1,172.16.50.254,14400
> dhcp-range=eth1,172.16.51.101,172.16.51.254,14400
> dhcp-range=eth4,172.16.56.20,172.16.56.254,14400
> dhcp-range=eth3,172.16.52.21,172.16.53.254,14400
> dhcp-option=eth1,3,172.16.48.1
> dhcp-option=eth4,3,172.16.56.1
> dhcp-option=eth3,3,172.16.52.1
> dhcp-option=eth1,1,255.255.252.0
> dhcp-option=eth4,1,255.255.255.0
> dhcp-option=eth3,1,255.255.254.0
> dhcp-option=eth1,6,172.16.48.146,172.16.48.147
> dhcp-option=eth4,6,172.16.48.146,172.16.48.147
> dhcp-option=eth3,6,172.16.52.3,172.16.48.146
> dhcp-lease-max=500
> dhcp-host=00:13:02:a9:8b:57,172.16.48.106,24h
> dhcp-host=94:39:e5:e6:a7:cf,172.16.48.208,24h
>
>
> Now the issue is that i when we assign the ips with dnsmasq running with
> multiple subnets as mentioned we face issues with range 49:
> dhcp-range=eth1,172.16.49.101,172.16.49.254,14400
> dhcp-range=eth1,172.16.50.1,172.16.50.254,14400
> dhcp-range=eth1,172.16.51.101,172.16.51.254,14400
>
> it assigns the 50 and 51 series fine with internet access but when assigns
> 49 series ip cant ping the untangles internal ip:172.16.48.4
> and hence no internet for 49 series
>
> Please suggest what can we do to resolve this.
>
> --
> Best Regards,
> * *
> *Subhranshu Dwivedi***
> Technology Support
> *Ermin Systems*
> subhranshu.dwivedi@**erminsystems.com<subhranshu.dwivedi at erminsystems.com>
>
>
>
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--
Best Regards,
* *
*Subhranshu Dwivedi***
Director IT
Technology Support
*Ermin Systems*
0120.437.6161 (Main)
741.581.0583(direct)
subhranshu.dwivedi@**erminsystems.com <subhranshu.dwivedi at erminsystems.com>
------------------------------
*Our Expertise: **Consulting Services | Data Centre Solutions | Storage
Solutions | Network Integration | IT Infrastructure Optimization | Managed
Services | Software Licensing | Audio-Visual Integration| Database
Migration | ERP Solutions| IVR Services | Virtualization |***
This email and any attachments are sent in confidence, subject to
applicable legal privilege and upon the basis that the recipient will
conduct appropriate virus checks. If you receive this email in error,
please telephone us upon receipt: you are strictly prohibited from using,
copying or disseminating it or any information contained in it, save to the
intended recipient. Internet communications are not secure and Ermin
Systems Pvt. Ltd. is not responsible for their abuse by third parties, nor
for any alteration or corruption in transmission, nor for any damage or
loss caused by any virus or other defects.
*P** **Please consider the environment before printing this e-mail.*
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