- IP Access List Overview
- Creating an IP Access List and Applying It to an Interface
- Creating an IP Access List to Filter IP Options, TCP Flags, Noncontiguous Ports
- Configuring an FQDN ACL
- Refining an IP Access List
- IP Named Access Control Lists
- Commented IP Access List Entries
- Standard IP Access List Logging
- IP Access List Entry Sequence Numbering
- Configuring Lock-and-Key Security (Dynamic Access Lists)
- ACL IP Options Selective Drop
- Displaying and Clearing IP Access List Data Using ACL Manageability
- ACL Syslog Correlation
- IPv6 Access Control Lists
- IPv6 ACL Undetermined-Transport Support
- Configuring Template ACLs
- IPv6 Template ACL
- IPv4 ACL Chaining Support
- IPv6 ACL Chaining with a Common ACL
- IPv6 ACL Extensions for Hop by Hop Filtering
IPv6 ACL Undetermined-Transport Support
The IPv6 ACL Undetermined-Transport Support feature helps in dropping misconfigured packets where the complete upper layer header is not present.
- Finding Feature Information
- Restrictions for IPv6 ACL Undetermined-Transport Support
- Additional References for IPv6 ACL Undetermined-Transport Support
- Feature Information for ACL Template
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Restrictions for IPv6 ACL Undetermined-Transport Support
IPv6 ACL Undetermined-Transport
Unintended misconfigurations by users or malicious attacks on the network may cause operational problems for hosts on the network.
Upper layer header is placed at the end of Extended Header (EH) chain in IPv6 packet, as it described in RFC 2460. If the complete upper layer header is not present in the IPv6 packet, then the router cannot process the packet. These packets may be misconfigured, corrupted, or malicious packets.
You may choose to drop these packets using IPv6 ACL with undetermined-transport option.
Configuring IPv6 ACL Undetermined-Transport Support
1.
enable
2.
configure
terminal
3.
ipv6
access-list
acl-name
4.
deny ipv6
{src-addr
|
any}
{dest-addr |
any}
[undetermined-transport]
5.
end
DETAILED STEPS
Example: Example for IPv6 ACL Undetermined-Transport Support
Device> enable Device# configure terminal Device(config)# ipv6 access-list acl1 Device(config-ipv6-acl)# deny ipv6 2001:DB8:0300:0201::/32 2001:DB8:1:1::/64 undetermined-transport Device(config-ipv6-acl)# end
Additional References for IPv6 ACL Undetermined-Transport Support
Related Documents
Related Topic |
Document Title |
---|---|
Cisco IOS commands |
|
IP access list commands |
Cisco IOS Security Command Reference |
Configuring IP access lists |
“Creating an IP Access List and Applying It to an Interface” |
Standards and RFCs
Standards/RFCs |
Title |
---|---|
RFC 2460 |
Internet Protocol, Version 6 (IPv6) Specification |
Technical Assistance
Description |
Link |
---|---|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for ACL Template
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Feature Name |
Releases |
Feature Information |
---|---|---|
IPv6 ACL Undetermined-Transport Support |
Cisco IOS XE Release 3.15 |
The IPv6 ACL Undetermined-Transport Support feature helps in dropping misconfigured packets, where the complete upper layer header is not present. No commands were introduced or modified. |