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I've a Centos Server. If login via the private IP while in the LAN, I can connect to FTP. If I try to login when outside the LAN, I receive a timeout error.

iptables is not configured, so it shouldn't be the problem. iptables -L -n returns an empty list.

I'm using vsftpd

The server is in a hosting I don't have control on. At the moment I can't ask to the sysadmin of the hosting if there's something blocking port 21.

What could I check on my server? Is there any way I can determine for sure if the port is blocked from a firewall outside my server?

Thanks.

testermaster
  • 353

2 Answers2

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Go to http://www.yougetsignal.com/tools/open-ports/ and test your public IP on port 20 and 21. If it says closed then something is blocking the communication to that port. It could be neccesary to do one, some or all the following tasks:

  • to configure a firewall
  • to open the port in a router
  • to route the port in the router to your server
jcbermu
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Private IPs are not reachable via the internet. Try to use DnyDNS to get a round this problem or get an official IP for your internet access and configure your firewall/router with NAT to access your internal devices.

Ƭᴇcʜιᴇ007
  • 113,841
ryder
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