Siemens S223 User Manual

UMN:CLI                                                                                                                                                              User  Manual 

SURPASS hiD 6615 S223/S323 R1.5 

174                                                                         A50010-Y3-C150-2-7619 

help prevent that hackers can find impossible connections.   

To configure not to send the message that informs TCP connection can not be done, use 
the following command. 

Configures to block the message that informs TCP 
connection can not be done. 

Global 

Responds the message again that informs TCP con-
nection is not possible. 

 

SYN sets up TCP connection. The hiD 6615 S223/S323 transmits cookies with SYN to a 
person who tries to make TCP connection. And only when transmitted cookies are re-
turned, it is possible to permit TCP connection. This function prevents connection over-
crowding because of accessed users who are not using and helps the other users use 
service.  

To permit connection only when transmitted cookies are returned after sending cookies 
with SYN, use the following command. 

Permits only when transmitted cookies are returned 
after sending cookies with SYN. 

Global 

Disables configuration to permit only when transmitted 
cookies are returned after sending cookies with SYN. 

 

Failures in network can occur by certain symptom. Each symptom can trace to one or 
more problems by using specific troubleshooting tools. The hiD 6615 S223/S323 switch 
provides the debug command to dump packet. Use debug commands only for problem 
isolation. Do not use it to monitor normal network operation. The debug commands pro-
duce a large amount of processor overhead. 

 

You can configure a packet dump type to verify dumped packets as the follows. 

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The hiD 6615 S223/S323 also provides debug command for Layer 3 routing protocols 
(BGP, OSPF, RIP and PIM). If you want to debug about them, refer to the each configura-
tion chapter.