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Enterprise Firewall · Network Security

Enterprise Firewall Services to Control Every Connection.

Protect dedicated servers, private networks, cloud environments and business applications with firewall architecture designed around your traffic flows, network topology and security policies. Reduce exposure and keep full control of who reaches what.

Traffic Filtering Inspect traffic by IP, port and protocol before it reaches your servers.
Access Policies Allow only approved sources and services, and reject everything else.
Network Segmentation Separate public, application, database and management zones.
Managed Security Managed firewall options with logging and DDoS integration.
IPv4 & IPv6 Policies VLAN Segmentation Traffic Logging DDoS Integration
Firewall Solution Request FREE CONSULTATION

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Tell us what you need to protect and how your network is set up. Our security team will review it and recommend a firewall design.

Optional — details help our team design the right firewall policies. 0 / 1500
Secure submission Security team review Custom policy design
What is an enterprise firewall

A Security Control Layer Between Trusted and Untrusted Networks

A firewall evaluates network traffic against defined security policies before it reaches your servers, applications or infrastructure. Connections that match policy are permitted; everything else is rejected.

HostGraber designs firewall architecture around your traffic flows, network topology and security requirements, for dedicated servers, private networks, cloud environments and enterprise applications.

  • Inspect

    Evaluate traffic against security policies

  • Control

    Allow or reject network connections

  • Segment

    Separate infrastructure zones

  • Monitor

    Maintain visibility into network activity

How a firewall segments infrastructureTraffic from the internet reaches the firewall policy layer. Traffic that does not match policy is denied. Permitted traffic is routed only to the security zone it is allowed to reach: DMZ, private database, management or backup zone.ALLOWDENIED BY POLICYInternetUntrustedFirewallPolicy layerInspect · controlSegment · logDMZ zoneWeb & applicationPrivate zoneDatabase networkManagement zoneAdmin access onlyBackup zoneBackup & DR network
Illustrative. Firewall placement and security zones are designed around your infrastructure.
Security capabilities

Granular Control Over Every Connection

Firewall policies define exactly which sources, ports and protocols can reach each part of your infrastructure, and record the activity for review.

IP filtering

Permit or restrict access using approved source and destination addresses.

Port control

Expose only the service ports your applications require.

Protocol policies

Define which network protocols are permitted for each service.

Network segmentation

Separate public, application, database and management networks.

Traffic logging

Maintain a record of network activity for visibility and review.

Custom policies

Rule sets designed around your applications and operational requirements.

Request Firewall Consultation
Firewall solutions

Firewall Services for Every Environment

From a single server to a multi-zone enterprise network, firewall architecture is matched to the environment it protects.

  • Dedicated server firewall

    Control the traffic reaching eligible dedicated server environments. Dedicated servers

  • Cloud and VPS firewall

    Policy-based access control for virtual servers and cloud workloads.

  • Colocation firewall

    Firewall architecture for customer-owned hardware in colocation. Colocation

  • Private network firewall

    Controlled boundaries between internal networks and VLANs. Private network

  • Application firewall architecture

    Restrict access to application tiers, admin panels and APIs.

  • Custom firewall architecture

    Placement, zones and policies designed around your topology.

Layered security

Firewall vs DDoS Protection

A firewall enforces who and what may connect. DDoS protection keeps services available under traffic floods. They are separate layers of the same security architecture.

AspectDDoS protectionFirewall
Primary roleAttack mitigationAccess control
Network segmentationNot a primary roleYes
Policy enforcementAttack-focusedCore function
Volumetric attack defenceDesigned for itLimited
Question it answersIs this traffic an attack?Is this connection permitted?

Internet-facing services typically need both layers. Explore DDoS protection →

Technical capabilities

Designed Into Your Network Architecture

Firewall services at HostGraber are planned alongside addressing, routing, segmentation and DDoS protection, not added as an afterthought.

Network policy support

IPv4 and IPv6

Firewall rules

Source, destination, port and protocol

VLAN

Network segmentation

Private network

Internal infrastructure segmentation

BGP

Integration for eligible architectures

DDoS protection

Layered security integration

Management

Managed firewall options

Get a Firewall AssessmentDiscuss on WhatsApp
Why HostGraber

Firewall Architecture From a Network Team

Effective firewall policy depends on understanding the network behind it. HostGraber brings server, VLAN, IP and BGP expertise together, so security policies reflect how your infrastructure actually carries traffic.

Talk to Our Network Team
  • Security policy design
  • VLAN and private networks
  • IPv4 and IPv6 architecture
  • BGP integration
  • DDoS protection integration
  • Managed infrastructure support
  • Control traffic
  • Reduce exposure
  • Protect infrastructure
Use cases

Firewall Services for Business-Critical Infrastructure

  1. 01

    Dedicated servers

    Restrict public access to only the services that need it.

  2. 02

    Private cloud

    Enforce boundaries between workloads and tenants.

  3. 03

    SaaS platforms

    Separate public application tiers from internal systems.

  4. 04

    Database networks

    Keep databases off the public internet, reachable only from approved tiers.

  5. 05

    ERP systems

    Limit access to business systems to approved users and networks.

  6. 06

    Hosting platforms

    Isolate customer environments and management networks.

  7. 07

    Colocation

    Apply security policy to customer-owned hardware and networks.

  8. 08

    Enterprise networks

    Segment departments, sites and infrastructure zones.

Deployment process

From Network Review to Ongoing Policy Management

  1. 01REVIEW

    Network review

    We map your services, networks and traffic flows.

  2. 02POLICY

    Policy design

    Required access and restrictions are defined for each service.

  3. 03ARCHITECT

    Architecture

    Firewall placement and security zones are planned.

  4. 04DEPLOY

    Implementation

    The configuration is deployed and validated.

  5. 05REVIEW

    Monitor and review

    Policies are adjusted as your infrastructure changes.

Start Your Network Review
Firewall insights

Enterprise Firewall Architecture: Policy, Segmentation and Readiness

An overview for IT and infrastructure teams responsible for server and network security: the role of the firewall, how security zones are structured and how HostGraber approaches policy design.

The role of the firewall in infrastructure security

Every internet-facing server is continuously reached by connection attempts, most of which have no legitimate purpose. Without a defined policy layer, any service listening on a server, including databases, remote access and management interfaces, may be exposed to the public internet.

An enterprise firewall establishes a controlled boundary. Each connection is evaluated against defined rules for source, destination, port and protocol, and only permitted traffic proceeds. The result is a significantly smaller attack surface and a documented, enforceable access model.

Security zones and network segmentation

Segmentation divides infrastructure into zones with different levels of trust. Traffic between zones passes through the firewall, so a compromise in one zone does not provide open access to the others.

ZoneTypical systemsTypical access policy
PublicInternetUntrusted; filtered at the firewall
DMZWeb and application serversOnly required public service ports
PrivateDatabase networkReachable from approved application tiers only
ManagementAdministrative accessRestricted to approved administrators and sources
Backup / DRBackup and disaster recovery networksIsolated; replication and backup traffic only

Policy design principles

A firewall is only as effective as the policy it enforces. HostGraber applies the following principles when designing rule sets:

  • Default deny: traffic is rejected unless a rule explicitly permits it
  • Least privilege: each service is reachable only by the sources that need it
  • Restricted management access: administrative interfaces are not exposed to the public internet
  • Documented rules: every rule has a defined purpose and owner
  • Periodic review: unused or outdated rules are removed as infrastructure changes

The firewall in a layered security architecture

A firewall controls access, but it is one layer of a broader design. DDoS protection preserves availability during traffic floods that a policy layer is not designed to absorb. Private networking keeps internal traffic off public interfaces, and infrastructure monitoring provides ongoing visibility.

HostGraber plans these layers together, so firewall policy, routing, addressing and protection work as one architecture.

Preparing for a firewall review

The following information allows our network team to assess requirements and propose a firewall design efficiently:

  • Infrastructure type: dedicated servers, VPS, colocation, private cloud or enterprise network
  • Public services, domains and the ports they require
  • Internal systems that must not be publicly reachable
  • Users, offices or networks that require administrative access
  • Existing firewall, VLAN or DDoS protection in place

Share these details through the firewall consultation form and our team will recommend an appropriate architecture.

Firewall glossary

Key Firewall Terminology

Firewall
A security control that permits or rejects network traffic according to defined policies.
Firewall rule
A policy entry that matches traffic by source, destination, port and protocol, and defines whether it is allowed.
Default deny
A policy model in which all traffic is rejected unless a rule explicitly permits it.
Least privilege
The principle of granting each user or system only the access it requires.
Network segmentation
Dividing infrastructure into separate zones so traffic between them can be controlled.
DMZ
A network zone that hosts public-facing services while keeping them separate from internal systems.
VLAN
Virtual LAN: a logically separated network segment running on shared physical infrastructure.
Port
A numbered endpoint on a server that identifies a specific service, such as web or remote access.
Traffic logging
Recording network connection activity for visibility, troubleshooting and review.
Managed firewall
A firewall service in which policy changes and ongoing administration are handled by the provider.
Frequently asked questions

Firewall Services Questions Answered

Have a question about your environment? Share your infrastructure and access requirements and our network team will advise.

Ask Our Network Team
What is an enterprise firewall?

An enterprise firewall controls network traffic according to defined security policies and helps separate trusted and untrusted network environments.

Can I protect a dedicated server with a firewall?

Yes. Firewall architecture can be deployed to control traffic reaching eligible dedicated server environments.

Can access be restricted by IP address?

Yes. Firewall rules can restrict access using approved source and destination addresses where supported.

Can a firewall separate public and private networks?

Yes. Firewalls create controlled security boundaries between public, application, database and management networks.

Is a firewall the same as DDoS protection?

No. A firewall enforces access policies, while DDoS mitigation focuses on protecting service availability from traffic-based attacks.

Can firewall and DDoS protection work together?

Yes. They operate as separate layers within a broader network security architecture.

Do you provide managed firewall services?

Managed firewall options can be discussed according to your infrastructure and operational requirements.

Does the firewall support IPv6?

Yes. Network policies can be defined for both IPv4 and IPv6 traffic.

Can firewall policies be updated as my infrastructure changes?

Yes. Policies are reviewed and adjusted as services, networks and access requirements change.

How do I get started with a firewall service?

Complete the firewall consultation form with your infrastructure type and requirements. Our network team will review your environment and recommend a firewall architecture.

Enterprise firewall services

Control Traffic. Reduce Exposure.

Tell us about your infrastructure. Our network team will review your traffic flows and recommend a firewall architecture.

Request Firewall Consultation Discuss on WhatsApp
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