не помогло
-------------
вот tcpdump ftp-соединения:
18:52:38.874079 arp who-has 192.168.111.1 tell 192.168.111.22
18:52:44.519288 IP 192.168.111.22.35769 > ftp.server.ftp: S 1618532643:1618532643(0) win 5840 <mss 1460,sackOK,timestamp 4294954492 0,nop,wscale 7>
18:52:44.520437 IP ftp.server.ftp > 192.168.111.22.35769: S 872785969:872785969(0) ack 1618532644 win 57344 <mss 1460,nop,wscale 0,nop,nop,timestamp 1187234408 4294954492>
18:52:44.520462 IP 192.168.111.22.35769 > ftp.server.ftp: . ack 1 win 46 <nop,nop,timestamp 4294954493 1187234408>
18:52:44.523434 IP ftp.server.cardax > 192.168.111.22.auth: S 3631407826:3631407826(0) win 57344 <mss 1460,nop,wscale 0,nop,nop,timestamp 1187234408 0>
18:52:44.523449 IP 192.168.111.22 > ftp.server: ICMP host 192.168.111.22 unreachable - admin prohibited, length 68
18:52:44.531429 IP ftp.server.ftp > 192.168.111.22.35769: P 1:40(39) ack 1 win 57920 <nop,nop,timestamp 1187234409 4294954493>
18:52:44.531469 IP 192.168.111.22.35769 > ftp.server.ftp: . ack 40 win 46 <nop,nop,timestamp 4294954495 1187234409>
18:52:44.531814 IP 192.168.111.22.35769 > ftp.server.ftp: P 1:14(13) ack 40 win 46 <nop,nop,timestamp 4294954495 1187234409>
18:52:44.532431 IP ftp.server.ftp > 192.168.111.22.35769: P 40:65(25) ack 14 win 57920 <nop,nop,timestamp 1187234409 4294954495>
18:52:44.532556 IP 192.168.111.22.35769 > ftp.server.ftp: P 14:32(18) ack 65 win 46 <nop,nop,timestamp 4294954496 1187234409>
18:52:44.533428 IP ftp.server.ftp > 192.168.111.22.35769: P 65:90(25) ack 32 win 57920 <nop,nop,timestamp 1187234409 4294954496>
18:52:44.572290 IP 192.168.111.22.35769 > ftp.server.ftp: . ack 90 win 46 <nop,nop,timestamp 4294954506 1187234409>
18:52:48.740517 IP 192.168.111.22.35769 > ftp.server.ftp: P 32:48(16) ack 90 win 46 <nop,nop,timestamp 4294955548 1187234409>
18:52:48.944633 IP 192.168.111.22.35769 > ftp.server.ftp: P 32:48(16) ack 90 win 46 <nop,nop,timestamp 4294955599 1187234409>
18:52:48.947418 IP ftp.server.ftp > 192.168.111.22.35769: . ack 48 win 57920 <nop,nop,timestamp 1187234851 4294955599>
---------
меня смущают выделенные строки