Ftp connectivity between two UNIX servers

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# 8  
Old 11-12-2013
And what are the symptoms/messages?
# 9  
Old 11-12-2013
ftp connectivity between two servers

From the server that I want to ftp I just type :
# ftp

and nothing happens, but if

to a different server on same chassis like:
# ftp
Connected to
220 mcelVMhost3 FTP server (Revision 6.0 Version wuftpd-2.6.1 Fri Apr  1 07:44:09 GMT 2011) ready.
Name ( root
331 Password required for root.
230 User root logged in.
Remote system type is UNIX.
Using binary mode to transfer files.

it works

Now if I even change source server like from

try to ftp to the server that is refusing to accept ftp sessions:
# ftp
Connected to
220 mcelVMhost5 FTP server (Revision 6.0 Version wuftpd-2.6.1 Fri Apr  1 07:44:09 GMT 2011) ready.
Name ( root
331 Password required for root.
230 User root logged in.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> bye
221-You have transferred 0 bytes in 0 files.
221-Total traffic for this session was 274 bytes in 0 transfers.
221-Thank you for using the FTP service on mcelVMhost5.
221 Goodbye.

it works fine as well
# 10  
Old 11-12-2013
So no response even in five minutes?

Still looks like a firewall issue to me. Can you telnet to a few things:-
telnet                    # Simple telnet
telnet 21                 # FTP port
telnet 25                 # SMTP, just as a test
telnet 123                # Hit the time server
telnet 99999              # Pick a port that should not respond

They should either connect or fail. Try pressing ENTER a few times. You can monitor their success from another session with netstat -na | grep 21 to see if the session is established.

Some may never connect, but you should wait at least 60 seconds before cancelling them.

What do you get?

If you are running Linux on either side, are you also using SELinux? That is know for odd errors unless you get it right, and i don't know how.

# 11  
Old 11-13-2013
Could be firewall/iptables on that client or on the route in. Try ping, traceroute, telnet 21 from that client host.
# 12  
Old 11-14-2013
ftp connectivity between two servers


we´ve not solved yet, the network team are saying that no restrictions were imposed on traffic between those two servers, so they are alledging that may be the routing table on the destination server is wrong, but I cant spot anything wrong on it:
#netstat -nrv
Routing tables
Dest/Netmask                    Gateway            Flags Refs Interface  Pmtu          UH    0    lo0       32808         UH    0    lan2      32808             U     2    lan2       1500        UG    0    lan2       1500             U     0    lo0       32808        UG    0    lan2       1500
default/                 UG    0    lan2       1500

# 13  
Old 11-26-2013
It seems odd that you have a 24 bit lan aove an 16 bit lan (10.*.*.* over 10.100.*.*).

Traceroute in each direction should show you the routing out and back. However, if routing is bad, ping should fail.
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