An FTP server is connected to a router with proxy ARP disabled. Local hosts can FTP to this server, but remote hosts fail to FTP. However, remote hosts able to ping to the FTP server. I've verified that no ACLs are configured on routers' interfaces along the IP path that deny FTP traffic.
Is there a possibility that disabling proxy ARP causes the problem? If the same remote host can ping to the server but can't FTP, this already isolated network layer and lower layers issue, and disabling proxy ARP should not be the cause of the problem.
It is unknown how the server is configured, whether it's pointing gateway to the router or it relies on proxy ARP. If it uses proxy ARP, pings from remote hosts should fail by right. Any thoughts?
Proxy ARP allows the router to respond to an ARP request (if a valid route is present)for a host that is not on the connected network where the ARP broadcast is heard. If the subnet mask and default gateway is correctly configured on the FTP server proxy ARP is not a factor. The server will only ARP to discover the MAC addresses of other hosts on the same subnet or the router interface on the subnet.
With your symptom I would want to be sure you don't have a duplicate IP address. The fact that local hosts are able to FTP suggests a whole duplicate subnet. Unplug your server and try the remote ping.
If that isn't your problem it is time to put a network analyzer (ethereal or Sniffer) on the server.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.