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Page 126 / 234 Scroll up to view Page 121 - 125
USER MANUAL
Peplink Balance Series
-126 / 234 -
Copyright © 2014 Peplink
Included IP
Address (es)
This setting specifies lists of WAN-specific Internet IP addresses that are candidates to be
returned when the Peplink Balance responds to DNS queries for the domain name
specified by Host Name.
The IP addresses listed in each box as
default
are the Internet IP addresses associated
with each of the WAN connections. Static IP addresses that are not associated with any
WAN can be entered into the Custom IP list.
A PTR record is also created for each Custom
IP.
For WAN connections that operate under Drop-in mode, there may be other routable IP
addresses in addition to the
default
IP address. Therefore, the Peplink Balance allows
custom Internet IP addresses to be added manually via filling the text box on the right-hand
side and clicking the
button.
Only the checked IP addresses in the lists are candidates to be returned when responding
to a DNS query.
If a WAN connection is down, the corresponding set of IP addresses will not be returned.
However, the IP addresses in the Custom IP field will always be returned.
If the Connection Priority field is set to
Custom
, you can also specify the usage priority of
each WAN connection. Only selected IP address(es) of available connection(s) with the
highest priority, and Custom IP addresses will be returned. By default, the Connection
Priority is set to
Default
.
16.3.10
PTR Records
PTR records are created along with A records pointing to Custom IPs. Please refer to section 16.3.9 for
details. For example, if you created an A record
www.mydomain.com
pointing to
11.22.33.44
, then a PTR
record
44.33.22.11.in-addr.arpa
pointing to
www.mydomain.com
will also be created.
When there are multiple host names pointing to the same IP address, only one PTR record for the IP
address will be created.
In order for PTR records to function, you also need to create NS records. For example, if the IP address
range
11.22.33.0
to
11.22.33.255
is delegated to the DNS server on the Peplink Balance, you will also
have to create a domain
33.22.11.in-addr.arpa
and have
its NS records pointing to your DNS server’s
(the Peplink Balance) public IP addresses.
With the above records created, the PTR record creation is complete.
Page 127 / 234
USER MANUAL
Peplink Balance Series
-127 / 234 -
Copyright © 2014 Peplink
16.3.11
TXT Records
This table shows the TXT record of the domain name.
To add a new TXT record, click the
New TXT Record
button in the
TXT Records
box. Click the
Edit
button to edit the record. The time-to-live value an
d the TXT record’s value can be entered. Click the
Save
button to finish.
When creating a TXT record for the domain itself (not a sub-domain), the Host field should be left blank.
The maximum size of the TXT Value is 255 bytes.
After completed editing the five types of record, you can simply leave the page by going to another
section of the Web Admin Interface.
16.3.12
SRV Records
To add a new SRV record, click the
New SRV Record
button in the
SRV Records
box.
Service
:
The symbolic name of the desired service.
Priority
: Indicates the priority of the Target; the smaller the value, the higher the priority.
Weight
: A relative weight for records with the same priority.
Target
: The canonical hostname of the machine providing the service.
Port
: Enter the TCP or UDP port number on which the service is to be found.
Page 128 / 234
USER MANUAL
Peplink Balance Series
-128 / 234 -
Copyright © 2014 Peplink
Domain Delegation
These are the steps to follow when you host your domain at an ISP or domain registrar, and want to delegate a sub-
domain to be resolved and managed by the Peplink Balance.
Click
New Domain Name
button to add a domain name.e.g.
www.mycompany.com
. Click the
corresponding domain name to view and edit record details.
Create SOA/NS records named
ns1, ns2, etc.
The IP addresses are the Balance’s DNS server addresses.
Then create an A record with an empty host name
Page 129 / 234
USER MANUAL
Peplink Balance Series
-129 / 234 -
Copyright © 2014 Peplink
If ISC BIND 8 or 9 is being utilized in the zone file mycompany.com, then add the following lines:
www
IN
NS
balancewan1
www
IN
NS
balancewan2
balancewan1
IN
A
202.153.122.108
balancewan2
IN
A
67.38.212.18
202.153.122.108 and 67.38.212.18 represent the WAN1 and WAN2 Internet IP addresses of the Peplink Balance,
respectively. The values of the IP addresses are fictitious and for illustration only.
Hosting the complete domain at Peplink Balance
To host your own DNS server, contact the DNS registrar to have the NS records of the domain (e.g.
mycompany.com) point
to your Balance’s WAN IP addresses.
Then follow these instructions:
1.
Under
Network>Inbound Access>DNS Settings
, create a new domain, for example mycompany.com.
2.
Create NS records named ns1, ns2, etc. The IP addresses are the
Balance’s DNS server addresses (same
as above).
3.
Create the corresponding A, CNAME, MX and TXT records as you wish. The A record resembles the one
below:
Testing the DNS Configuration
The following steps can be used to test the DNS configuration:
From a host on the Internet, use an IP address of Peplink Balance and nslookup to lookup the corresponding host
name. Check the information that is returned for the expected results.
An nslookup in Windows will appear as follows:
C:\Documents and Settings\User Name>nslookup
Default Server:
ns1.myisp.com
Address:
147.22.11.2
>server 202.153.122.108
(This is Peplink
Balance’s WAN IP address
.)
Default Server:
balance.mycompany.com
Address:
202.153.122.108
>www.mycompany.com
(This is the hostname to be looked up.)
Default Server:
balance.mycompany.com
Address:
202.153.122.108
Name:
www.mycompany.com
Address:
202.153.122.109, 67.38.212.19
Please note that the values of the IP addresses are fictitious and for illustration only.
Page 130 / 234
USER MANUAL
Peplink Balance Series
-130 / 234 -
Copyright © 2014 Peplink
16.4
Reverse Lookup Zones
Reverse lookup Zones can be configured in
Network>Inbound Access>DNS Settings
.
Reverse lookup refers to performing a DNS query to find one or more DNS names associated with a
given IP address.
The DNS stores IP addresses in the form of specially formatted names as pointer (PTR) records using
special domains/zones. The zone is in-addr.arpa.
To enable DNS clients to perform a reverse lookup for a host, perform two steps:
Create a Reverse Lookup Zone that corresponds to the subnet network address of the host.
In the Reverse Lookup Zone, add a pointer (PTR) resource record that maps the host IP address
to the host name.
Click the
New Reverse Lookup Zone
button and enter a Reverse Lookup Zone Name. If you are
delegated the subnet 11.22.33.0/24, the Zone Name should be 33.22.11.in-arpa.addr.PTR
records for 11.22.33.1, 11.22.33.2, ... 11.22.33.254 should be defined in this zone where the Host
IP Numbers are 1, 2, ... 254 respectively.

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