The main function of the Barracuda Link Balancer is to manage the links having static IP addresses. It also authenticates the links through PPPoE and automatically collects the internet bandwidth from different links. The administrators can select different links from one or multiple ISPs to link the access to a cost-effective internet bandwidth. A single session like TCP has a bandwidth from one link, like WAN. If a computer is connected to multiple remote sites, it will have multiple sessions.
Maintaining the Links
The Barracuda Link Balancer manages the links by keeping the healthy links and removing the failed links. It consistently monitors every internet link and detects a failed link when it reappears without the administrator intervention. When link failure happens, the sessions get disconnected. The clients from failed links can reconnect fast to their place through any other available link instead of waiting for a failed link to recover.
Outbound Link Balancing
The Barracuda Link Balancer can manage the traffic that comes from clients IP address and goes to a new IP address. It selects the right link by evaluating the traffic for each link on the basis of uplink speed and its usage. The application uses the link having the largest capacity. Whenever required, you can easily develop an outbound routing rule to override the selection.
Link Failure and Inbound Link Balancing
The Barracuda Link Balancer also practices the authoritative DNS to bring the incoming connections to WAN. If the external user reaches a website hosted at the back of the Barracuda Link Balancer, for example, the Barracuda gets the DNS request for that website’s IP address. In fact, the Barracuda responds with that IP address that gets the traffic to WAN. It evaluates the capacity of the link in terms of speed and usage before making a decision about which IP address to choose. The load balancing is achieved by selecting the link with the largest capacity. In other words, the Barracuda Link Balancer becomes an authoritative DNS server for both sub-domains and domains hosted by you. It is easy for you to develop the record for DNS on the Barracuda to recognize your domain and to locate that domain to externally available IP addresses.
VLAN Support by Barracuda
The Barracuda Link Balancer also supports the Layer 2 VLANs and helps bring the high availability configurations by using the two Barracuda Link Balancers as a pair, like one as active and another as passive.
Quality of Service
The Barracuda Link Balancer manages the bandwidth with software that automatically focuses on the critical internet app. Like, you can choose to prefer the email and web browsing rather than media streaming. This ensures quality and least interference of bandwidth-intensive applications with business-critical functions.
The Barracuda Link Balancer uses the standard firewall operations, like the Network Address Translation, IP masquerading, Port forwarding, IP access lists, Port blocking, and DDoS or preventing the distributed denial of service attacks. If you have your own firewall, you can choose to disable the Barracuda Firewall by keeping the link balancing, failover and bandwidth management services.
As data traffic grows exponentially – and organizations grow ever more dependent on continuous connectivity – the ability to intelligently and dynamically balance traffic across multiple Internet links is critical to efficiently maintain day-to-day operations. The Barracuda Link Balancer deploys transparently in front of legacy firewalls that cannot handle such requirements and the best solutions for barracuda link balancer around is Absolute Solutions.
The Barracuda Advantage
- Deploys rapidly while retaining existing firewall and router settings
- Inbound link load balancing using authoritative DNS
- Automatic VPN failover and failback between Internet links
- Application-aware traffic shaping across Internet links
- Dynamic link load balancing and failover across multiple ISPs
- Ensure's maximum Internet uptime and high availability
- Real-time visibility into health, performance, and utilization of Internet links
Cost-Effective Internet Continuity
Internet continuity is just as important as application and data availability in a business continuity plan. The Barracuda Link Balancer provides: automatic Internet link monitoring and failover, which prevents Internet downtime and lost employee productivity during ISP outages. Key services such as web, voice, and email continue to be available to customers and partners, protecting the business and brand.
Scale Bandwidth and Performance
Scale bandwidth and increase reliability without purchasing expensive backup lines. Transparent switching and failover across multiple Internet links based on active monitoring of link health and performance guarantee maximum speed and reliability. Application-aware traffic shaping allows granular bandwidth prioritization for critical Internet applications and infrastructure across one or more Internet links.
Quick Return on Investment
The Barracuda Link Balancer is affordably priced, without any per-user or per-port fees. Drop-in, transparent deployment ensures rapid installation with minimal disruptions to existing network infrastructure. It provides immediate return
on investment by allowing the provisioning of underutilized backup links or the use of low-cost Internet links instead of expensive T1 lines – while making Internet connectivity more reliable.
- WAN and Internet connection link balancing
- Inbound link balancing
- Automated link failover and failback
- Link health monitoring
- Link speed assignment and weighting
- Transparent "drop in" mode
Basic Firewall Functions
- Network Address Translation (NAT)
- 1:1 NAT
- Port forwarding
- Firewall IP Access Control Lists (ACLs) and rules
- Firewall transparency
- DHCP server
- Authoritative DNS server
- DNS request forwarding
- Site-to-site VPN
- Outbound Source NAT
- VLAN support
Bandwidth Management and Quality of Service (QOS)
- Application-based priority assignments
- Custom port-based application definition
- Preconfigured protocols: Web, Email, FTP, DNS, Network Authentication, Terminal Services and SIP
- Web-based interface
- Traffic and performance monitoring
- Event logging
- SNMP support
- Secure remote administration