linux - How to connect to ftp server from within LAN when the router port-forwards external connection away from it -


sorry long question.

what means this: managing small lan protected router.

router     192.168.1.1 server     192.168.1.9 client     192.168.1.2 client     192.168.1.4

since have static ip isp, lets 245.34.344.34, can access lan @ address.

now, have set router's port forwarding config this: when ssh 245.34.344.34 out internet, forwards server 192.168.1.9:22. , when ftp 245.34.344.34, forwards client 192.168.1.2:21. fine.

then, when working within lan, on client 192.168.1.2 computer , want access 192.168.1.9 through ftp, router tries forward 192.168.1.2. not sure happening.

on server 192.168.1.9 (which runs ubuntu 14.04.3 lts (gnu/linux 3.19.0-47-generic i686), when sudo ufw status:

to                         action      --                         ------      ---- 80                         allow       anywhere 443                        allow       anywhere 22                         allow       anywhere 3000                       allow       anywhere 21/tcp                     allow       anywhere 21                         allow       anywhere 80 (v6)                    allow       anywhere (v6) 443 (v6)                   allow       anywhere (v6) 22 (v6)                    allow       anywhere (v6) 3000 (v6)                  allow       anywhere (v6) 21/tcp (v6)                allow       anywhere (v6) 21 (v6)                    allow       anywhere (v6)

but if nmap localhost:

port     state service 22/tcp   open  ssh 80/tcp   open  http 631/tcp  open  ipp 3306/tcp open  mysql

now on client 192.168.1.2, nmap 192.168.1.9:

port     state  service 21/tcp   closed ftp 22/tcp   open   ssh 80/tcp   open   http 443/tcp  closed https 3000/tcp closed ppp

it shows server's port 21 closed.

i don't it.

can please me understand how reach server through ftp within lan?

thanks

as understand ftp daemon supposed running on 192.168.1.9. if should forward port 21 192.168.1.9 not 192.168.1.2. 1 problem.

another problem based on output of nmap 192.168.1.2 against 192.168.1.9 there no ftp daemon on 192.168.1.9. make sure installed, configured, , running.

if have networking configured on 192.168.1.2, should bypassing router access 192.168.1.9.


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