nat64，When accessing port 21, NAT cannot be performed

[wenxiang_guo]

I add a nat policy like below

When I telnet 1111:2222::ac10:0a32 port 20(or other port number),the log show like below

but,when I telnet 1111:2222::ac10:0a32 port 21,the log show like below,it is not nated

Does anyone know the reason for this problem?Thanks!

[wenxiang_guo]

This is my nat policy

[wenxiang_guo]

[wenxiang_guo]

This is the log

[PhoneBoy]

FTP (TCP Port 21) is somewhat of a special case due to how FTP works but it should still be supported.

Have you confirmed (through use of tcpdump) that NAT is actually not taking place?

[wenxiang_guo]

Hi Dameon

My ftp application is working normal over nat64,I just can not see the translation logs.Is this a bug?

Thanks for your help!

[PhoneBoy]

Doesn't seem like it to me.

I would open a TAC case so we can investigate.