Transmission Control Protocol is the standard transport layer protocol used in IP networks. TCP Server Test Suite can be used for evaluating TCP/IP implementations for security flaws and robustness problems.
ISA Security Compliance Institute - Embedded Device Security Assurance - Testing the robustness of implementations of the IETF TCP transport protocol over IPv4 or IPv6 - Version 1.41
Internet Protocol Specification
Transmission Control Protocol
Echo Protocol
IP MTU Discovery Options
TCP Extensions for Long-Delay Paths
U.S. Department of Defense: Security Options for the Internet Protocol
Requirements for Internet Hosts -- Communication Layers
TCP Alternate Checksum Options
Path MTU Discovery
TCP Extensions for High Performance
EIP: The Extended Internet Protocol: A Framework for Maintaining Backward Compatibility
Traceroute Using an IP Option
TP/IX: The Next Internet
T/TCP -- TCP Extensions for Transactions Functional Specification
An Extension to TCP : Partial Order Service
IPv4 Option for Sender Directed Multi-Destination Delivery
Requirements for IP Version 4 Routers
TCP Selective Acknowledgment Options
IP Router Alert Option
Protection of BGP Sessions via the TCP MD5 Signature Option
An Extension to the Selective Acknowledgement (SACK) Option for TCP
Computing TCP's Retransmission Timer
The Addition of Explicit Congestion Notification (ECN) to IP
Increasing TCP's Initial Window
The Security Flag in the IPv4 Header
Experimental Values in IPv4, IPv6, ICMPv6, UDP and TCP Headers
Quick-Start for TCP and IP
IANA Considerations for the IPv4 and IPv6 Router Alert Options
TCP User Timeout Option
TCP Congestion Control
The TCP Authentication Option
Cryptographic Algorithms for the TCP Authentication Option (TCP-AO)The TCP Authentication Option
TCP Extensions for Multipath Operation with Multiple Addresses
TCP Fast Open
RFC793
RFC793 and extensions
RFC793
RFC793