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USER MANUAL
Peplink Balance Series
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Copyright © 2014 Peplink
16.3
Inbound Access Services
16.3.1 Definition of Services
Services are defined at:
Network>Inbound Access>Services
.
Tip
At least one server must be defined before services can be added.
To define a new service, click the
Add Service
button, upon which the following menu appears:
Services Settings
Enable
This setting specifies whether the inbound service rule takes effect.
When
Yes
is selected, the inbound service rule takes effect. If the inbound traffic matches the
specified IP Protocol and Port, action will be taken by the Peplink Balance based on the other
parameters of the rule.
When
No
is selected, the inbound service rule does not take effect. The Peplink Balance will
disregard the other parameters of the rule.
Service Name
This setting identifies the service to the System Administrator. Only alphanumeric and the
underscore “_” characters
are valid.
IP Protocol
The IP Protocol setting, along with the Port setting, specifies the protocol of the service as
TCP, UDP, ICMP or IP. Inbound traffic that matches the specified
IP protocol
and
Port
(s) will
be forwarded to the LAN hosts specified by the
Servers
setting.
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Upon choosing a protocol, the Protocol Selection Tool drop-down menu can be used to
automatically the Port information of common Internet services (e.g. HTTP, HTTPS, etc.).
After selecting an item from the Protocol Selection Tool drop-down menu, the Protocol and
the Port number will remain manually modifiable.
Port
The Port setting specifies the port(s) that correspond to the service, and can be configured to
behave in one of the following manners:
Any Port, Single Port, Port Range, Port Map and Range Mapping
Any Port
: all traffic that is received by the Peplink Balance via the specified protocol is
forwarded to the servers specified by the Servers setting.
For example, if IP Protocol is set to
TCP
, and Port is set to
Any Port
, then all TCP traffic will
be forwarded to the configured servers.
Single Port
: traffic that is received by the Peplink Balance via the specified protocol at the
specified port is forwarded via the same port to the servers specified by the Servers setting.
For example, if IP Protocol is set to
TCP
, Port is set to
Single Port,
and
Service Port
is set to
80, then TCP traffic received on Port 80 will be forwarded to the configured servers via Port
80.
Port Range
: traffic that is received by the Peplink Balance via the specified protocol at the
specified port range is forwarded via the same respective ports to the LAN hosts specified by
the Servers setting.
For example, if IP Protocol is set to
TCP
, Port is set to
Port Range,
and
Service Port
set to
80-88, then TCP traffic received on ports 80 through 88 will be forwarded to the configured
servers via the respective ports.
Port Mapping
: traffic that is received by the Peplink Balance via the specified protocol at the
specified port is forwarded via a different port to the servers specified by the Servers setting.
For example, if IP Protocol is set to
TCP
, Port is set to
Port Mapping
,
Service Port
is set to
80, and
Map to Port
is set to 88, then TCP traffic on Port 80 is forwarded to the configured
servers via Port 88.
(Please see below for details on the Servers setting.)
Range Mapping
: traffic that is received by Peplink Balance via the specified protocol at the
specified port range is forwarded via a different port to the servers specified by the Servers
setting.
Inbound IP
Address(es)
This setting specifies the WAN connections and Internet IP address(es) from which the
service can be accessed.
Included
Server(s)
This setting specifies the LAN servers that handle requests for the service, and the relative
weight values. The amount of traffic that is distributed to a server is proportional to the weight
value assigned to the server relative to the total weight.
Example:
With the following weight settings on a Peplink Balance:
demo_server_1:
10
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Peplink Balance Series
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Copyright © 2014 Peplink
demo_server_2:
5
The total weight is 15 = (10 + 5)
Matching traffic distributed to demo_server_1:67% = (10 / 15) x 100%
Matching traffic distributed to demo_server_2:33% = (5 / 15) x 100%
16.3.2 UP
N
P
/
NAT-PMP
S
ETTINGS
UPnP and NAT-PMP are network protocols which allow a computer connected to the LAN port to
automatically configure the router to allow parties on the WAN port to connect to itself. That way, the
process of inbound port forwarding becomes automated.
When a computer creates a rule using these protocols, the specified TCP/UDP port of all WAN
connections' default IP address will be forwarded.
Check the corresponding box(es) to enable UPnP and/or NAT-PMP. Enable these features only if you
trust the computers connected to the LAN ports.
When the options are enabled, a table listing all the forwarded ports under these two protocols can be
found at
Status>UPnP / NAT-PMP
.
16.3.3 Definition of DNS Records
(Available on Peplink Balance 210+ and MediaFast 200+)
The built-in DNS Server functionality of the Peplink Balance facilitates inbound load balancing. With this
functionality, NS/SOA DNS records for a domain name can be delegated to the Internet IP address(es) of
the Peplink Balance. Upon receiving a DNS query, the Peplink Balance can return(
as an “A” record
) the
IP address for the domain name on the most appropriate healthy WAN connection. It can also act as a
generic DNS server for hosting “A”, “CNAME”, “MX”, “TXT” and “NS” records.
For example:
(This example is for illustration only; the actual resolution that takes place in implementation will likely be
different.)
The DNS resolution of the domain name www.mycompany.comis delegated to the WAN2 Internet IP
addresses of the Peplink Balance.
Upon receiving the DNS query, the Peplink Balance returns (
as an “A”
record) the IP address for
www.mycompany.com on WAN1 because WAN1 is the most appropriate healthy link.
The settings for defining the DNS records to be hosted by the Peplink Balance are located at:
Network>Inbound Access>DNS Settings
.
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Copyright © 2014 Peplink
DNS Settings
DNS Server
This setting specifies the WAN IP addresses on which the DNS server of the Peplink
Balance should listen.
If no addresses are selected, the Inbound Link Load Balancing feature will be disabled and
the Peplink Balance will not respond to DNS requests.
To specify and/or modify the IP addresses on which the DNS Server should listen, click the
button that corresponds to
DNS Server
, and the following screen is displayed:
To specify the Internet IP addresses on which the DNS Server should listen, select the
desired WAN connection then select the desired associated IP addresses. (Multiple items in
the list can be selected by holding CTRL and clicking on the items.)
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USER MANUAL
Peplink Balance Series
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Copyright © 2014 Peplink
Click
Save
to save the settings when configuration is complete.
Zone Transfer
This setting specifies the IP address(es) of the secondary DNS server(s)authorized to
retrieve zone records from the DNS server of the Peplink Balance.
The zone transfer server of the Peplink Balance listens on TCP Port 53.
The Peplink Balance serves both the clients that are accessing from the specified IP
addresses, and the clients that are accessing its LAN Interface.
Default SOA / NS
Click the
button to define a default SOA / NS record for all Domain Names. For
Configuration details please refer to section16.3.5.
When defining a default SOA record, the field Name Server IP Address is optional. If left
blank, the Address (A) record for the same server should be defined manually in each
domain.
For defining default NS records, the host
[domain]
indicates that this record is for the
domain name itself without a sub-domain prefix. To add a secondary NS server, just create
a second NS record with the Host field left empty. When the entered Name Server is a fully
qualified domain name (FQDN), the IP Address field will be disabled.
Default
Connection
Priority
Default Connection Priority defines the default priority group of each WAN connection in
resolving A records. It applies to Address (A) records which have the Connection Priority
set to
Default
. Please refer to Section16.3.9 for details.
The WAN connection(s) with the highest priority (smallest number) will be chosen. Those
with lower priorities will not be chosen in resolving A records unless the higher priority ones
become unavailable.
To specify the Primary and Backup connections, click the
button that corresponds to
Default Connection Priority
. The following screen will appear:
Each WAN connection is associated with a priority number. Click
Save
to save the settings
when configuration is complete.
Domain name
This section shows a list of domain names to be hosted by the Peplink Balance. Each
domain can have its
“NS”, “
MX
” and “TXT”
records, and its sub-
domains’ “A”
and
“CNAME”
records. Add a new record by clicking the
New Domain Name
button. Click on a domain

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