Chris Wilson <[email protected]> 
Sent by: [email protected]
01/12/2010 05:03 PM
Please respond to
Linux Users Group Uganda <[email protected]>


To
Linux Users Group Uganda <[email protected]>
cc

Subject
Re: [LUG] FTP Server Problem






Hi Allan,

On Tue, 12 Jan 2010, [email protected] wrote:

> On Tue, 12 Jan 2010, [email protected] wrote:
> 
> > I have installed the VSFTP service on my Linux boss running SUSE linux 

> > 10.2,
> 
> Wow, you're lucky to have Linux as your boss :)

Forgot to have the extra privilege of having root on him to install 
whatever you want :)

> When does the server start to "seem to be dropping my traffic"? when i 
try
> connecting, see logs below
> ;
> rror:        Unable to connect!
> Status:        Waiting to retry... (2 retries left)
> Status:        Connecting to ftp.xx.com
> Error:        Unable to connect!
> Status:        Waiting to retry... (1 retry left)
> Status:        Connecting to ftp.xx.com
> Error:        Unable to connect!
> 
> If you are able to log in, try changing FTP mode to active or passive to
> see if either one works better? am not able to go in

Looks like a firewall or address binding problem. Please do this:

> Please list all your INPUT firewall rules on the server, with:
> 
>  iptables -L -nv INPUT

Chain input_ext (2 references)
target     prot opt source               destination
DROP       0    --  anywhere             anywhere            PKTTYPE = 
broadcast
ACCEPT     icmp --  anywhere             anywhere            icmp 
source-quench
ACCEPT     icmp --  anywhere             anywhere            icmp 
echo-request
ACCEPT     icmp --  anywhere             anywhere            state 
RELATED,ESTABLISHED icmp echo-reply
ACCEPT     icmp --  anywhere             anywhere            state 
RELATED,ESTABLISHED icmp destination-unreachable
ACCEPT     icmp --  anywhere             anywhere            state 
RELATED,ESTABLISHED icmp time-exceeded
ACCEPT     icmp --  anywhere             anywhere            state 
RELATED,ESTABLISHED icmp parameter-problem
ACCEPT     icmp --  anywhere             anywhere            state 
RELATED,ESTABLISHED icmp timestamp-reply
ACCEPT     icmp --  anywhere             anywhere            state 
RELATED,ESTABLISHED icmp address-mask-reply
ACCEPT     icmp --  anywhere             anywhere            state 
RELATED,ESTABLISHED icmp protocol-unreachable
ACCEPT     icmp --  anywhere             anywhere            state 
RELATED,ESTABLISHED icmp redirect
LOG        tcp  --  anywhere             anywhere            limit: avg 
3/min burst 5 tcp dpt:domain flags:FIN,SYN,RST,ACK/SYN LOG level warning 
tcp-options ip-options prefix `SFW2-INext-ACC-TCP '
ACCEPT     tcp  --  anywhere             anywhere            tcp 
dpt:domain
LOG        tcp  --  anywhere             anywhere            limit: avg 
3/min burst 5 tcp dpt:http flags:FIN,SYN,RST,ACK/SYN LOG level warning 
tcp-options ip-options prefix `SFW2-INext-ACC-TCP '
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:http
LOG        tcp  --  anywhere             anywhere            limit: avg 
3/min burst 5 tcp dpt:ssh flags:FIN,SYN,RST,ACK/SYN LOG level warning 
tcp-options ip-options prefix `SFW2-INext-ACC-TCP '
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ssh
ACCEPT     udp  --  anywhere             anywhere            udp 
dpt:domain
ACCEPT     udp  --  anywhere             anywhere            udp dpt:tftp
reject_func  tcp  --  anywhere             anywhere            tcp 
dpt:ident state NEW
LOG        0    --  anywhere             anywhere            limit: avg 
3/min burst 5 PKTTYPE = multicast LOG level warning tcp-options ip-options 
prefix `SFW2-INext-DROP-DEFLT '
DROP       0    --  anywhere             anywhere            PKTTYPE = 
multicast
LOG        tcp  --  anywhere             anywhere            limit: avg 
3/min burst 5 tcp flags:FIN,SYN,RST,ACK/SYN LOG level warning tcp-options 
ip-options prefix `SFW2-INext-DROP-DEFLT '
LOG        icmp --  anywhere             anywhere            limit: avg 
3/min burst 5 LOG level warning tcp-options ip-options prefix 
`SFW2-INext-DROP-DEFLT '
LOG        udp  --  anywhere             anywhere            limit: avg 
3/min burst 5 LOG level warning tcp-options ip-options prefix 
`SFW2-INext-DROP-DEFLT '
LOG        0    --  anywhere             anywhere            limit: avg 
3/min burst 5 state INVALID LOG level warning tcp-options ip-options 
prefix `SFW2-INext-DROP-DEFLT-INV '
DROP       0    --  anywhere             anywhere
And please paste the contents of /etc/xinetd.d/vsftpd (or similar), and 

# default: off
# description:
#   The vsftpd FTP server serves FTP connections. It uses
#   normal, unencrypted usernames and passwords for authentication.
# vsftpd is designed to be secure.
#
# NOTE: This file contains the configuration for xinetd to start vsftpd.
#       the configuration file for vsftp itself is in /etc/vsftpd.conf
service ftp
{
#        server_args             =
#        log_on_success          += DURATION USERID
#        log_on_failure          += USERID
#        nice                    = 10
        socket_type     = stream
        protocol        = tcp
        wait            = no
        user            = root
        server          = /usr/sbin/vsftpd
}

the "listen" and "listen_address" values in /etc/vsftpd/vsftpd.conf.
listen=YES

There is no Listen_address.

Cheers, Chris.
-- 
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