topic Re: nat64，When accessing port 21, NAT cannot be performed in General Topics

nat64，When accessing port 21, NAT cannot be performed

wenxiang_guo — Wed, 23 Jan 2019 03:39:27 GMT

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 — Wed, 23 Jan 2019 03:42:52 GMT

This is my nat policy

wenxiang_guo — Wed, 23 Jan 2019 03:47:25 GMT

wenxiang_guo — Wed, 23 Jan 2019 03:50:52 GMT

This is the log

PhoneBoy — Sat, 26 Jan 2019 04:30:07 GMT

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 — Mon, 28 Jan 2019 01:49:55 GMT

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 — Mon, 28 Jan 2019 04:54:09 GMT

Doesn't seem like it to me.

I would open a TAC case so we can investigate.