Re: Problem ftp-proxy can't connect Cli-Data (fwd)

On Wed, May 23, 2001 at 02:12:11PM +0200, Thomas Boernert wrote:

-- Mit freundlichen Grüssen Best regards

Thomas Börnert Systemmanager IT Geschäftsführer

DO NOT GIVE OUR ADDRESS TO THIRD PARTYS, WE HATE JUNK-MAIL __________________________________________________________________ TBits.net GmbH | Fon: +49 (0)700 BOERNERT Thomas Börnert | oder +49 (0)700 26376378 Postfach 64 | Auto: +49 (0)170 6744415 D-73551 Alfdorf | Fax: +49 (0)89 2443 31823 http://www.tbits.net | Mail: info@tbits.net

---------- Forwarded message ---------- Date: Thu, 17 May 2001 18:14:14 +0200 (CEST) From: Thomas Boernert To: wiegand@suse.de Subject: Problem ftp-proxy can't connect Cli-Data

Hallo Hr. Wiegand,

habe ein kleines Prob mit ftp-proxy 1.7

log <---- snip -----> ftp-child [9267] <05/17-18:06:47> USER-INF connect from 10.130.2.193 ftp-child [9267] <05/17-18:06:47> USER-INF 'USER tbitsnet' dest 212.87.131.2:21 from 10.130.2.193 ftp-child [9267] <05/17-18:06:47> USER-INF reading data for 'tbitsnet' from cfg-file ftp-child [9267] <05/17-18:06:47> USER-INF 'PASS XXXX' from 10.130.2.193 ftp-child [9267] <05/17-18:06:48> USER-INF 'PWD' from 10.130.2.193 ftp-child [9267] <05/17-18:06:48> USER-INF 'SYST' from 10.130.2.193 ftp-child [9267] <05/17-18:06:48> USER-INF 'PORT 10.130.2.193:1351' from 10.130.2.193 ftp-child [9267] <05/17-18:06:48> USER-INF 'LIST' from 10.130.2.193 ftp-child [9267] <05/17-18:06:48> TECH-INF 'PORT 212.87.134.1:1371' for 10.130.2.193 ftp-child [9267] <05/17-18:06:48> TECH-ERR can't connect Cli-Data for 10.130.2.193

The "TECH-ERR can't connect Cli-Data" is a known bug - you'll get this message if a bind(2) call is failed. FTP-Servers try's to call bind up to 10 times before they gives up; the proxy gives up after the first failure. It is on my TODO, I'll try to fix it next week (I hope to have the time :-).

<---- snip ---->

conf <----- snip -----> AllowMagicUser yes DestinationAddress 212.87.134.1 Listen 10.130.2.70 LogDestination /var/log/ftp-proxy.log ServerType standalone User ftpproxy <----- snip ----->

tcpdump eth0 internal <----- snip -----> 18:11:34.049891 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: S 2206604325:2206604325(0) win 16384 (DF) 18:11:34.049959 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: S 1960461970:1960461970(0) ack 2206604326 win 32120 (DF) [tos 0x10] 18:11:34.051328 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: . 1:1(0) ack 1 win 17520 (DF) 18:11:34.052606 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: P 1:66(65) ack 1 win 32120 (DF) [tos 0x10] 18:11:34.099076 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: P 1:34(33) ack 66 win 17455 (DF) 18:11:34.099121 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: . 66:66(0) ack 34 win 32120 (DF) [tos 0x10] 18:11:34.184823 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: P 66:103(37) ack 34 win 32120 (DF) [tos 0x10] 18:11:34.204609 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: P 34:49(15) ack 103 win 17418 (DF) 18:11:34.221545 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: . 103:103(0) ack 49 win 32120 (DF) [tos 0x10] 18:11:34.249718 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: P 103:133(30) ack 49 win 32120 (DF) [tos 0x10] 18:11:34.275126 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: P 49:54(5) ack 133 win 17388 (DF) 18:11:34.283599 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: P 133:164(31) ack 54 win 32120 (DF) [tos 0x10] 18:11:34.301927 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: P 54:60(6) ack 164 win 17357 (DF) 18:11:34.308334 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: P 164:183(19) ack 60 win 32120 (DF) [tos 0x10] 18:11:34.356986 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: P 60:84(24) ack 183 win 17338 (DF) 18:11:34.357246 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: P 183:213(30) ack 84 win 32120 (DF) [tos 0x10] 18:11:34.381134 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: P 84:90(6) ack 213 win 17308 (DF) 18:11:34.387861 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: P 213:246(33) ack 90 win 32120 (DF) [tos 0x10] 18:11:34.581545 eth0 > gate1-eth0.erni.de.ftp > tboernert2.erni.de.1354: P 213:246(33) ack 90 win 32120 (DF) [tos 0x10] 18:11:34.582361 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: . 90:90(0) ack 246 win 17275 (DF) 18:11:34.583447 eth0 < tboernert2.erni.de.1354 > gate1-eth0.erni.de.ftp: . 90:90(0) ack 246 win 17275 (DF) <----- snip ----->

tcpdump eth1 extern <----- snip -----> 18:12:26.076937 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: S 2005935881:2005935881(0) win 32120 (DF) [tos 0x10] 18:12:26.081374 eth1 < virtweb5.imos.net.ftp > gate1-eth1.erni.de.1516: S 2159835676:2159835676(0) ack 2005935882 win 32736 18:12:26.081420 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: . 1:1(0) ack 1 win 32120 (DF) [tos 0x10] 18:12:26.115269 eth1 < virtweb5.imos.net.16437 > gate1-eth1.erni.de.auth: S 728091206:728091206(0) win 512 18:12:26.115338 eth1 > gate1-eth1.erni.de > virtweb5.imos.net: icmp: gate1-eth1.erni.de tcp port auth unreachable [tos 0xc0] 18:12:26.124315 eth1 < virtweb5.imos.net.ftp > gate1-eth1.erni.de.1516: P 1:93(92) ack 1 win 32736 (DF) [tos 0x10] 18:12:26.124368 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: . 1:1(0) ack 93 win 32028 (DF) [tos 0x10] 18:12:26.124505 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: P 1:16(15) ack 93 win 32120 (DF) [tos 0x10] 18:12:26.139257 eth1 < virtweb5.imos.net.ftp > gate1-eth1.erni.de.1516: P 93:130(37) ack 16 win 32736 (DF) [tos 0x10] 18:12:26.141547 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: . 16:16(0) ack 130 win 32120 (DF) [tos 0x10] 18:12:26.168521 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: P 16:31(15) ack 130 win 32120 (DF) [tos 0x10] 18:12:26.185160 eth1 < virtweb5.imos.net.ftp > gate1-eth1.erni.de.1516: . 130:130(0) ack 31 win 32736 (DF) [tos 0x10] 18:12:26.213774 eth1 < virtweb5.imos.net.ftp > gate1-eth1.erni.de.1516: P 130:160(30) ack 31 win 32736 (DF) [tos 0x10] 18:12:26.231545 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: . 31:31(0) ack 160 win 32120 (DF) [tos 0x10] 18:12:26.248855 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: P 31:36(5) ack 160 win 32120 (DF) [tos 0x10] 18:12:26.257228 eth1 < virtweb5.imos.net.ftp > gate1-eth1.erni.de.1516: P 160:191(31) ack 36 win 32736 (DF) [tos 0x10] 18:12:26.271545 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: . 36:36(0) ack 191 win 32120 (DF) [tos 0x10] 18:12:26.283926 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: P 36:42(6) ack 191 win 32120 (DF) [tos 0x10] 18:12:26.289229 eth1 < virtweb5.imos.net.ftp > gate1-eth1.erni.de.1516: P 191:210(19) ack 42 win 32736 (DF) [tos 0x10] 18:12:26.301544 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: . 42:42(0) ack 210 win 32120 (DF) [tos 0x10] 18:12:26.366328 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: P 42:67(25) ack 210 win 32120 (DF) [tos 0x10] 18:12:26.371698 eth1 < virtweb5.imos.net.ftp > gate1-eth1.erni.de.1516: P 210:240(30) ack 67 win 32736 (DF) [tos 0x10] 18:12:26.391544 eth1 > gate1-eth1.erni.de.1516 > virtweb5.imos.net.ftp: . 67:67(0) ack 240 win 32120 (DF) [tos 0x10] <---- snip ---->

Transparent Proxy will ich eigentlich nicht verwenden. Was ist das Problem. Es findet keine Kommunikation mit Port 20 statt. Wenn ich von dem Rechner auf dem der ftp-proxy laueft ein ftp zu dem host mache, dann geht es.

Danke fuer Info.

Gruss Thomas Boernert

-- Mit freundlichen Grüssen Best regards

Thomas Börnert Systemmanager IT Geschäftsführer

DO NOT GIVE OUR ADDRESS TO THIRD PARTYS, WE HATE JUNK-MAIL __________________________________________________________________ TBits.net GmbH | Fon: +49 (0)700 BOERNERT Thomas Börnert | oder +49 (0)700 26376378 Postfach 64 | Auto: +49 (0)170 6744415 D-73551 Alfdorf | Fax: +49 (0)89 2443 31823 http://www.tbits.net | Mail: info@tbits.net

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