Barracuda Networks Firewall X100 User's Guide Page 47
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Additional DNS Records
After a zone has been created, you can edit its records or add NS records, A records, and any of the following records to the zone:
Record Description
Mail Exchanger (MX)
MX records point to the email servers that are responsible for
handling email for a given domain. There should be an MX record for
each email server, including any backup email servers. If an email
server lies within the domain, it requires an A record for each name
server. If the email server is outside the domain, specify the FQDN of
the server, ending with a dot.
Example: mail.my-isp.net
Text (TXT)
Text records allow text to be associated with a name. This can be
used to specify Sender Policy Framework (SPF) or DomainKeys
records for the domain.
Canonical Name (CNAME)
A CNAME record provides a mapping between this alias and the true,
or canonical, hostname of the computer. It is commonly used to hide
changes to the internal DNS structure. External users can use an
unchanging alias while the internal names are updated. If the real
server is outside the domain, specify the FQDN of the server, ending
with a dot.
Example: server1.my-isp.net
If a domain name has a CNAME record associated with it, then it
cannot have any other record types. Do not use CNAME defined
hostnames in MX records.
Service (SRV)
Service records are used to store the location of newer protocols,
such as SIP, LDAP, IMAP, and HTTP.
Pointer (PTR)
PTR records point to a canonical name. The most common use is to
provide a way to associate a domain name with an IP address.
Other (OTHER)
Use an OTHER record to add a type of DNS record that is not
supported, such as NAPTR.
More information about these records and their attributes can be found in the online help.
Back to .How to Configure Authoritative DNS
How to Configure an Authoritative DNS Host
To make the Barracuda Firewall an authoritative DNS host, complete the following steps:
Step Explanation
Step 1. Enable Authoritative DNS on the Barracuda Firewall Enable the DNS Server service on the links and the service on the
Barracuda Firewall.
Step 2. Create One or More Domains Define one or more domains on the Barracuda Firewall.
Step 3. Set up DNS for Internal Clients (Split DNS) Make your internal DNS server forward queries to the Barracuda
Firewall. Configure split DNS.
Step 4. Add More DNS Records Add more DNS records for web servers and email servers.
Step 5. Update Your Domain Registrar Tell the Internet that your domain exists or has changed.
Step 6. Test Test external access.
- Barracuda Firewall - Overview 3
- Known Issues and Limitations 5
- Please Read Before Upgrading 5
- High Availability 9
- Configuration Wizards 10
- Usability Improvements 13
- Firmware Improvements 16
- Release Highlights 17
- High Availability Support 18
- Log Streaming 18
- NAT Objects Tab 20
- Barracuda Firewall Technology 25
- APPLICATION CONTROL 26
- IDENTITY AWARENESS 26
- LINK OPTIMIZATION TECHNOLOGY 27
- Underlying Technology 27
- Getting Started 28
- Protect my Network Wizard 29
- Without a Wizard 29
- Networking 31
- Configure the WAN Interface 36
- Configure the Radio 38
- How to Add a Static Route 40
- How to Configure a Bridge 40
- How to Configure a DMZ 41
- Step 3. Configure the Client 43
- Monitoring Active Leases 44
- Configure a Forward Proxy 44
- DNS Records 46
- Additional DNS Records 47
- Barracuda Firewall 49
- Enable High Availability 50
- Firewall 51
- Firewall Rules 52
- Applications/Bandwidth 53
- Firewall Rules Order 54
- Pre-Installed Firewall Rules 55
- Connection Objects 56
- Exampl 57
- Service Objects 58
- Interface Groups 59
- Link Balancing 59
- Outbound Link Balancing 60
- Inbound Load Balancing 60
- Enable and Configure IPS 60
- Click .Add 61
- Step 1. Create a User Object 63
- Bandwidth Policies 64
- Queues and Rate Limits 65
- Configure the Captive Portal 66
- Upload a Certificate 66
- Incoming Traffic 67
- Case 3 – Mail Server Only 69
- Outgoing Traffic 70
- Step 1. Create a Time Object 75
- Managing Users and Groups 81
- Local Authentication 82
- Guest Access 82
- Barracuda DC Agent 83
- Active Directory 83
- Group Filter Patterns 84
- How to Join a Windows Domain 85
- Delete a Guest Ticket 91
- Create a Ticket 91
- Client-to-Site VPN 93
- Import External Certificates 96
- Certificates for Clients iOS 96
- Step 5. Configure the Client 96
- MS-CHAPv2/NTLM 98
- External Resource 101
- Step 2. Configure Phase 2 102
- Step 3. Disable Mode Config 102
- Configuring Site-to-Site VPNs 104
- Static WAN IP Address 105
- Dynamic WAN IP Address 105
- Related Articles 108
- Phase 1 and Phase 2 issues 108
- Client Requirements 109
- Configuring SSL VPNs 109
- Step 1. Enable the SSL VPN 110
- Static IP Address 110
- Secondary IP Address 110
- Dynamic Network Interface 110
- Step 4. Upload a Certificate 112
- Next Steps 112
- Cloud Features 114
- Barracuda Cloud Control 115
- Monitoring 116
- In this Section 117
- Active Connections 117
- Recent Connections 117
- Status Code Overview 118
- Viewing Logs 121
- Service Log 122
- Authentication Log 122
- HTTP Log Codes Overview 122
- Troubleshooting 123
- Reboot Options 124
- Maintenance 125
- Before You Begin 127
- X100 / X101 X200 / X201 130
- Limited Warranty and License 132
- Exclusions and Restrictions 133
- Software License 133
- Open Source Licensing 136
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