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port forwarding for FTP Passive ports!!

duahimanshu816
Level 1
Level 1

Hello,

I have Cisco 2911 Series router, i have configured virtual interface, on a router 

i.e.  port channel 1.11,  Port Channel 1.100 and so on. 

Router configuration:-

configuration on port channel 1.11:-

IP address:1.1.1.1/24

IP nat inside

Configuration on port channel 1.100

IP address:-2.2.2.2/30

ip nat outside.

IP access list 101 permit tcp range 2000 2100

ip access list 101 permit tcp 21

ip nat inside source list 101 interface port channel 1.100

Now, we have linux server working under .11 network and we have configured FTP:21 and passive port range is 2000 to 2100.

when ever i tries to check the port 21 is open or not form the outside network (port channel.100) it works. but whenever i tries to access FTP it does not works and it says "entering into the passive mode"  "directory not listening". 

when i bypass the router and connect the cable to directly my serverand try to access ftp with port:21 then it works, so it seems i am doing something wrong on a router kindly help to find out the issue

thanks in advance :)

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