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Surf Control 5.2.4 Benutzerhandbuch

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Administrator’s Guide
SurfControl RiskFilter - E-mail V5.2.4
F
INDING
 
YOUR
 
WAY
 
AROUND
Load balancing with RiskFilter
1
L
OAD
 
BALANCING
 
WITH
 R
ISK
F
ILTER
You can deploy RiskFilter in a cluster and load-balance using MX records: 
1
On the DNS server hosting your domain, create an MX record for each primary RiskFilter server using 
the same MX preference. 
2
Give the failover server a higher number. This will give it a lower preference.
Table 1-1 shows an example of MX preference assignments for load-balancing and failover using MX 
records.
                                
                                
                                
                                
                                
Figure 1-2
Load balancing
Table 1-1  Using MX Records for Load-Balancing
Mail Exchanger
IP Address
MX Preference
Site A
mx1.siteA.com
208.126.216.20
5
mx2.siteA.com
208.126.216.21
5
mx3.siteA.com
208.126.216.22
5
mx4.siteA.com
197.201.56.201
10
Site B
mx1.siteB.com
197.201.56.201 
5
mx2.siteB.com
197.201.56.202
5
mx3.siteB.com
197.201.56.203 
5
mx4.siteB.com
208.126.216.20
10