Index

T

T/TCP 458

task bar properties 710

TCP 521

ACK (acknowledgment) 453 ACK number 438 connections 521

port numbers 521 SYN (synchronize) 453 window size 438

TCP Decoder 457

TCP decoy portscan 451 TCP distributed portscan 451 TCP flag bits 438

TCP portscan 451 TCP portsweep 451 TCP RST 452 TCP SYN flood 453 TCPdump 440

Telnet 604

and address groups 604 and address objects 604 and zones 604

with SSH 602

terminate user connection 327

terminology differences bandwidth management 112 NAT 112

with other products 112 with ZyNOS 112

three-way handshake 453 through-ZyWALL firewall. See firewall. time servers (default) 578

time to live 433 timestamp 434

to-ZyWALL firewall 279

and NAT traversal (VPN) 297 and OSPF 238

and remote management 279 and RIP 236

and service control 587 and virtual servers 256 and VPN 297

and VRRP 495

and VRRP groups 495 global rules 279

to-ZyWALL firewall. See also firewall. trademarks 755

traffic anomaly 448, 450

Transmission Control Protocol. See TCP. Transport Layer Security (TLS) 605 trial subscription services 167

triangle routes 283

vs virtual interfaces 283 triangle routes (firewall) 284

Triple Data Encryption Standard. See 3DES. troubleshooting 647, 651 truncated-address-header 459 truncated-header 459 truncated-options 458 truncated-timestamp-header 459

trunks 180, 219 and ALG 265

and policy routes 219, 231 configuration overview 115 member interface mode 223 member interfaces 223 prerequisites 116

where used 116

trunks. See also load balancing.

Trusted Certificates. See also certificates. 556

U

u encoding 458

UDP 521 messages 521 port numbers 521

UDP Decoder 457

UDP decoy portscan 451 UDP distributed portscan 451 UDP flood attack 454

UDP portscan 451 UDP portsweep 451 undersize-len 458 undersize-offset 458

updating

Anti-Virus signatures 171

IDP and AppPatrol signatures 173 system protect signatures 175

upgrading license 169

URI (Uniform Resource Identifier) 439

usage CPU 158 flash 158 memory 158 onboard flash 158 sessions 158

user authentication 503, 531, 532 external 504

local user database 531

User Datagram Protocol. See UDP. user groups 505

778

 

ZyWALL USG 1000 User’s Guide