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ZyWALL USG 1000 User’s Guide
778
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