TWSD-196 We observing Private IP on WAN link of LLB for outbound traffic |AS-13270|SaraswatBank

Review Request #881 — Created May 22, 2025 and submitted

Information
mingji
APV10
rel_apv_10_7
TWSD-196
Reviewers
kevin.poh, timlai, weikai 
LLB will forward packet on WAN with private IP after the session is closed(pcb is deleted).

When APV recieveing a packet but the pcb is not existed, APV won't check NAT table to do proper IP translation.


Solution:

In click_route_packet(), if there is a NAT entry match the packet's tuple, rewrite source IP address in mbuf.
    

  1. establish a TCP connection
    2. 

  2. close the socket
    3. 

  3. client sends RST to server
    4.
mingji
timlai
timlai 
  1. Ship It!
  2. 
  
    
 
    

 
    
  


    
 
    
 
      

  

 
    


    

 
    

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kevin.poh




   

   







  

 



 

  


   

   

    
 
kevin.poh


    
   


  

  

  



    




  1. 
 
    
  
    
   
    Ship It!
    
  
    
 
    

 
    
  


    
 
    
 
      

  

 
    


    

 
    

    2. 















  2. 
 
    
  
    
   
    
  
    
 
    

 
    
  


    
 
    
 
      

  

 
    


    

 
    

    3. 




  

 
















 





 

  

   




weikai




   

   







  

 



 

  


   

   

    
 
weikai


    
   


  

  

  



    




  1. 
 
    
  
    
   
    Ship It!
    
  
    
 
    

 
    
  


    
 
    
 
      

  

 
    


    

 
    

    2. 















  2. 
 
    
  
    
   
    
  
    
 
    

 
    
  


    
 
    
 
      

  

 
    


    

 
    

    3. 




  

 
















 



 

  

   




mingji




   

   

  

 



 

  


   

   

    
 Review request changed

    
   


  

  

  






 

  Status:
  

  Closed (submitted)

  
 







 


 










  

 









     

    

   

  

  

   
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