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1-5
Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring Connection Settings
Guidelines and Limitations
Guidelines and Limitations
This section includes the following guidelines and limitations:
•
TCP State Bypass Guidelines and Limitations, page 1-5
TCP State Bypass Guidelines and Limitations
Context Mode Guidelines
Supported in single and multiple context mode.
Firewall Mode Guidelines
Supported in routed and transparent mode.
Failover Guidelines
Failover is supported.
Unsupported Features
The following features are not supported when you use TCP state bypass:
•
Application inspection—Application inspection requires both inbound and outbound traffic to go
through the same ASA, so application inspection is not supported with TCP state bypass.
•
AAA authenticated sessions—When a user authenticates with one ASA, traffic returning via the
other ASA will be denied because the user did not authenticate with that ASA.
•
TCP Intercept, maximum embryonic connection limit, TCP sequence number randomization—The
ASA does not keep track of the state of the connection, so these features are not applied.
•
TCP normalization—The TCP normalizer is disabled.
•
SSM and SSC functionality—You cannot use TCP state bypass and any application running on an
SSM or SSC, such as IPS or CSC.
NAT Guidelines
Because the translation session is established separately for each ASA, be sure to configure static NAT
on both ASAs for TCP state bypass traffic; if you use dynamic NAT, the address chosen for the session
on ASA 1 will differ from the address chosen for the session on ASA 2.
Default Settings
TCP State Bypass
TCP state bypass is disabled by default.
TCP Normalizer
The default configuration includes the following settings:
no check-retransmission
no checksum-verification
exceed-mss allow
queue-limit 0 timeout 4
reserved-bits allow
Summary of Contents for 5505 - ASA Firewall Edition Bundle
Page 28: ...Glossary GL 24 Cisco ASA Series CLI Configuration Guide ...
Page 61: ...P A R T 1 Getting Started with the ASA ...
Page 62: ......
Page 219: ...P A R T 2 Configuring High Availability and Scalability ...
Page 220: ......
Page 403: ...P A R T 2 Configuring Interfaces ...
Page 404: ......
Page 499: ...P A R T 2 Configuring Basic Settings ...
Page 500: ......
Page 533: ...P A R T 2 Configuring Objects and Access Lists ...
Page 534: ......
Page 601: ...P A R T 2 Configuring IP Routing ...
Page 602: ......
Page 745: ...P A R T 2 Configuring Network Address Translation ...
Page 746: ......
Page 845: ...P A R T 2 Configuring AAA Servers and the Local Database ...
Page 846: ......
Page 981: ...P A R T 2 Configuring Access Control ...
Page 982: ......
Page 1061: ...P A R T 2 Configuring Service Policies Using the Modular Policy Framework ...
Page 1062: ......
Page 1093: ...P A R T 2 Configuring Application Inspection ...
Page 1094: ......
Page 1191: ...P A R T 2 Configuring Unified Communications ...
Page 1192: ......
Page 1333: ...P A R T 2 Configuring Connection Settings and QoS ...
Page 1334: ......
Page 1379: ...P A R T 2 Configuring Advanced Network Protection ...
Page 1380: ......
Page 1475: ...P A R T 2 Configuring Modules ...
Page 1476: ......
Page 1549: ...P A R T 2 Configuring VPN ...
Page 1550: ......
Page 1965: ...P A R T 2 Configuring Logging SNMP and Smart Call Home ...
Page 1966: ......
Page 2059: ...P A R T 2 System Administration ...
Page 2060: ......
Page 2098: ...1 8 Cisco ASA Series CLI Configuration Guide Chapter 1 Troubleshooting Viewing the Coredump ...
Page 2099: ...P A R T 2 Reference ...
Page 2100: ......