CuteFTP Professional User s Guide 

10. Do a traceroute to the destination to verify all routers along the connection path are 

operational. 

11. Verify that your subnet mask is setup properly. 

WSAECONNREFUSED (10061) 

1.  The remote host actively refused the attempt to connect to it. 

2.  Verify that the destination server name or IP address is correct  

3.  Verify that the connection port number is correct (under Site Settings | Type tab). 

4.  The remote server may be temporarily or permanently inaccessible (try again later). 

5.  Verify that you have chosen the right protocol (SSH2, SSL, FTP, etc.) and have 

setup all required options for that protocol.  

6.  Verify that the destination IP address and port numbers are correct.  

7.  The remote server may be refusing multiple connections from the same client. Try 

using only one connection thread when connecting to this particular server (Site 

Settings | Options). 

8.  Try pinging the address. 

9.  If you are using a router, verify the router is up and running (check by pinging it and 

then ping an address outside of the router). 

10. Do a traceroute to the destination to verify all routers along the connection path are 

operational. 

11. Verify that your subnet mask is setup properly. 

WSAESERVERDOWN (10064) 

The server is temporarily or permanently unreachable. Verify that the 

destination host name or IP address is correct and try again later. 

WSAESERVERUNREACH (10065) 

The server is unreachable. Verify that the destination host name or IP address 

is correct and try again later. 

SFTP 

ERROR 

#4 

This is a general SFTP connection error. See Trouble Shooting SFTP connections for help. 

E

RROR 

421 

MESSAGES

Common Error 421 Problems 

Error 421 Service not available, closing control connection.  

Error 421 User limit reached 

Error 421 You are not authorized to make the connection 

Error 421 Max connections reached 

Error 421 Max connections exceeded 

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