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List:       pureftpd-list
Subject:    tcp port ftp unreachable problem
From:       john harkcom <jxxh () earthlink ! net>
Date:       2007-08-22 12:03:26
Message-ID: 46CC260E.3080309 () earthlink ! net
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...have a null modem cable between Linux client and Linux ftp server
...private network/no internet
...using standalone pure-ftpd server  (version  pure-ftpd-1.0.20)
...no firewall active
...xinetd killed
...ppp up and running;
...ppp started with following command
     pppd /dev/ttyS0 nodetach novj noaccomp no...  etc     (no 
compression used)

...pure-ftpd started w/ following command;
     /usr/local/sbin/pure-ftpd -4 -S 199.168.1.2,21

  client 199.168.1.3 ------>   server 199.168.1.2

...able to pling remote node in both directions

... ftp client cannot connect  to pure-ftpd server with the following 
error:
           ftp: connect: connection refused

tcpdump  on  ftp server shows following  output:

  15:34:17.616064 199.168.1.3.1026 > 199.168.1.2.ftp: S 
2913324875:2913324875(0) win 5840 <mss 1460,sackOK,timestamp 66794 
0,nop,wscale 0> (DF)
  15:34:17.616064 199.168.1.2 > 199.168.1.3: icmp: 199.168.1.2  tcp 
port  ftp unreachable [tos  0xc0]

                  (I could understand tcp server being unreachable if
                      pure-ftpd was not running, but that is not the case)

...pure-ftpd hangs in ftpd.c,  in  routine standalone_server(void), at 
line 5693, in the select system call:

           while(stop_server == 0) {
                 safe_fd_set(listenfd, &rs);
                 safe_fd_set(listenfd6, &rs);
5693:                if (select(max_fd,  &rs, NULL, NULL, NULL)  <= 0) {
                       if (errno != EINTR) {
                                (void) sleep(1);
                       }
                       continue;

I would appreciate any help you can provide and I hope this is enough 
info. If not, please let me know so that I can supply same.  Thanks.


        John        
        jxxh@earthlink.net







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