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Each computer and device within an IP network is assigned a unique IP address that identifies the host. Because of a shortage of public IPv4 addresses, most of these IP addresses are private and not routable anywhere outside of the private company network. RFC 1918 defines the private IP addresses you can use internally that should not be advertised:10.0.0.0 through 10.255.255.255172.16.0.0 through 172.31.255.255192.168.0.0 through 192.168.255.255One of the main functions of Network Address Translation (NAT) is to enable private IP networks to connect to the Internet. NAT replaces a private IP address with a public IP address, translating the private addresses in the internal private network into legal, routable addresses that can be used on the public Internet. In this way, NAT conserves public addresses because it can be configured to advertise at a minimum only one public address for the entire network to the outside world.Other functions of NAT include:Security-Keeping internal IP addresses hidden discourages direct attacks.IP routing solutions-Overlapping IP addresses are not a problem when you use NAT.Flexibility-You can change internal IP addressing schemes without affecting the public addresses available externally; for example, for a server accessible to the Internet, you can maintain a fixed IP address for Internet use, but internally, you can change the server address.Translating between IPv4 and IPv6 (Routed mode only)-If you want to connect an IPv6 network to an IPv4 network, NAT lets you translate between the two types of addresses.You can use Security Cloud Control to create NAT rules for many different use cases. Use the NAT rule wizard or these topics to create different NAT rules:
- Jun 08, 2026
Directory of AI Defense developer tools, APIs, and SDKs
- Jul 20, 2026
- Product AI Defense
A tenant that fails to authenticate cannot be deleted. A tenant that fails to authenticate cannot be deleted. A tenant that fails to authenticate cannot be deleted.
- Apr 28, 2026
- Product Secure Access
A minimum user role of Read-only. For more information, see Manage Accounts. A minimum user role of Read-only. For more information, see Manage Accounts. A minimum user role of Read-only. For more information, see Manage Accounts. Manage Accounts
- Apr 28, 2026
- Product Secure Access
Android 8.0 or higher versionValid invite to an authorized user from a Secure Access administratorDevice with a camera or Firefox browser installedCisco Secure Client application installed Android 8.0 or higher versionValid invite to an authorized user from a Secure Access administratorDevice with a camera or Firefox browser installedCisco Secure Client application installed
- Apr 28, 2026
- Product Secure Access
Troubleshoot Intermittent DNS Resolution Failures on a VA Deployed in Azure
If you have deployed the VA on Azure as a stand-alone virtual machine (VM) without a public IP address, you might experience intermittent DNS resolution issues when heavy DNS traffic is directed at the VA. This is due to SNAT port exhaustion on virtual machines deployed to Azure (such as the VA) because Azure only pre-allocates 1024 UDP ports for standalone VMs without a public IP address. To address this issue, you may either need to assign a public IP to each VA or deploy VAs behind a public Standard Load Balancer in Azure.Note: If you are assigning a public IP to a VA, make sure that there are no inbound port rules for this VA that allow inbound access from the internet.
- Apr 28, 2026
- Product Secure Access
In the Meraki SM, your profile now has a new setting called “Umbrella DNS Proxy.”This setting was pushed from the Secure Access dashboard.umbrella_DNS_proxy.jpg In the Meraki SM, your profile now has a new setting called “Umbrella DNS Proxy.”This setting was pushed from the Secure Access dashboard. umbrella_DNS_proxy.jpg umbrella_DNS_proxy.jpg
- Apr 28, 2026
- Product Secure Access
Usage : config snmp {configure | enable | disable | status | - h | --help} the configure option requires args: configure -v2 \[ -c ' ' \] Enable SNMP v2 * c – Community string; Default public -v3 -u ' ' -p ' ' \[-a [MD5|SHA\] -x \[AES|DES\] -X \[password\]] Enable SNMP v3 with username and password * u - Username consists of alphanumeric characters up to 32 characters. * p - Password consists of alphanumeric characters between 8 to 12 characters. * a - Optional password hash algorithm; Default SHA * x - Optional encryption algorithm; Default AES * X - Privacy password to be used along with AES algorithm. Must consist of alphanumeric characters between 8 to 255 characters. the other options do not take args: enable Enable the SNMP. disable Disable the SNMP. status Show SNMP service status and Version information. - h, --help Display this usage information.
- Apr 28, 2026
- Product Secure Access
Navigate to Monitor > Reports > App Discovery and click one of the app labels to open the Apps Grid.Click the name of an app to view its details for the last 90 days.View the initial details of the app, including the name and a description of the app.Risk Score—The overall score is calculated from the risk details.Unreviewed, Approved, Not Approved, or Under Audit — Current status od the app. Click Control this app to edit the label or control the app. For more information, see Control Apps.App URL—The URL of the app.Category—The category the app falls under. For more information, see Application Categories.Identities—The number of sources that accessed the app.Vendor—The owner of the app.Traffic—The number of bytes of total traffic and bytes blocked.DNS Requests—The total number of DNS requests and the percentage of requests blocked by Secure Access.First Detected—The date the app was first detected.Last detected—The date the app was last detected.Click Risk Details.The Risk Details tab displays the app's risk score and how it was calculated, including Business Risk, Usage Risk, and Vendor Compliance.Click Identities.The Identities tab lists your organization's sources that have made DNS requests and traffic for this app.Click the Download CSV icon to download this information as a CSV file.Click Attributes.The Attributes tab lists the various attributes associated with this app.Attributes are divided into categories. Click a category name to view the attributes associated with it. (Not all applications will show all attribute categories.)For each displayed attribute, Secure Access shows whether the attribute applies to the application and the dates when the attribute information was collected and updated. Use the attributes to evaluate the risk that the application will expose your environment to data breaches, identity theft, financial fraud, and other cyber threats.The attribute categories are:Compliance attributes — Indicate whether the application complies with the requirements of a number of certifications such as GDPR, HIPAA, and FEDRAMP.Vulnerabilities attributes — Indicate whether the application is vulnerable to exploits that attackers could use to compromise the security of the affected systems, steal sensitive data, or cause other types of damage.Access control attributes — Indicate the methods the application supports to manage and restrict access based on a user's identity, role, and authorization level.Data security attributes — Indicate the practices and technologies the application uses to protect data from unauthorized access, use, disclosure, modification, or destruction.Auditability attributes — Indicate the abilities the application provides for an administrator to review the activity and transactions of a system, to ensure that it is operating in a compliant and secure manner.Email authenticity attributes — Indicate what methods the app provides to verify that email is actually from the sender that it claims to be from, and that the message has not been tampered with or altered in any way during transit.
- Apr 28, 2026
- Product Secure Access
Results 1-10 out of 243
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Cisco Secure Multicloud Defense
- https://secure.cisco.com/ciscosecure-multicloud-defense
- https://secure.cisco.com/secure-workload
Cisco Multicloud Defense White Paper
Abstract Applications and workloads are no longer limited to the data center. Today, organizations also deploy workloads and applications to public and private cloud environments, oftentimes more than one cloud, for greater agility, flexibility, and scale. As organizations continue to expand their m...
- https://secure.cisco.com/ciscosecure-multicloud-defense/docs/cisco-multicloud-defense-white-paper
Create beautiful product and API documentation with our developer friendly platform.
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This document provides an overview of new features and notable improvements in the 10.0 release. Features that have a dedicated document on this site are linked below, and more will be added. Version 10.0 is a feature-rich release that expands on many of the improvements in version 7.6 while adding ...
- https://secure.cisco.com/secure-firewall/docs/whats-new-in-100
Cisco Multicloud Defense Architecture Guide
Overview The Cisco Multicloud Defense Architecture Guide provides Reference Architecture diagrams of how the Cisco Multicloud Defense solution is deployed within each Cloud Provider and for each security use-case. These diagrams describe the architectural deployment scenarios available to address di...
- https://secure.cisco.com/ciscosecure-multicloud-defense/docs/cisco-multicloud-defense-architecture-guide
Cisco Secure Firewall Snort 2 and Snort 3 Intrusion Policy Guidance
- https://secure.cisco.com/secure-firewall/docs/intrusion-policy-73
An introduction to the Cisco Secure Firewall solutions
- https://secure.cisco.com/secure-firewall/docs/secure-firewall