Bug#620871: EPRT for IPv4 fails with IPv6 enabled server.
Am 04.04.2011 um 21:46 schrieb Mats Erik Andersson: Hi Mats, When using the IPv6-enabled server (and 'net.ipv6.bindv6only = 0') an IPv4-only client will get a positive/successful response to an EPRT command. However, the connection fails, because the server is establishing an IPv6 socket at ':ftp-data', not the expected IPv4 socket. The exchange goes like this: The submitter of #620871 stated that the fix for his bug could solve your problem too and hence it would be fixed in unstable. Please be so kind to re-test the issue. Many Thanks, Hilmar -- http://www.hilmar-preusse.de.vu/ #206401 http://counter.li.org
Bug#620871: EPRT for IPv4 fails with IPv6 enabled server.
Am 04.04.2011 um 21:46 schrieb Mats Erik Andersson: Dear Mats, Package: proftpd-basic Version: 1.3.3a-6squeeze1 Severity: normal Tags: ipv6 upstream That bug was filed years ago against an old version. Are you still able to reproduce the problem? Sorry for the long response time! When using the IPv6-enabled server (and 'net.ipv6.bindv6only = 0') an IPv4-only client will get a positive/successful response to an EPRT command. However, the connection fails, because the server is establishing an IPv6 socket at ':ftp-data', not the expected IPv4 socket. The exchange goes like this: > ls 200 EPRT command successful 425 Unable to build data connection: Invalid argument After reconfiguring the server to be IPv4-only, the EPRT is fully functional, as is to be expected. The proftpd-server was freshly installed for the purpose of testing different clients, so besides the setting "UseIPv6" nothing was ever changed in the configuration. At the moment I can trigger this error using a patched FTP client from GNU Inetutils. Since this patching works correctly against the OpenBSD FTP server (with PASV, EPSV, LPSV, PORT, EPRT, LPRT), I am personally convinced that the error lies in 'poftpd/modules/mod_core.c'. Granted some time I might be able to craft a Perl client to also trigger this error. -- http://www.hilmar-preusse.de.vu/ #206401 http://counter.li.org
Bug#620871: EPRT for IPv4 fails with IPv6 enabled server.
Package: proftpd-basic Version: 1.3.3a-6squeeze1 Severity: normal Tags: ipv6 upstream When using the IPv6-enabled server (and 'net.ipv6.bindv6only = 0') an IPv4-only client will get a positive/successful response to an EPRT command. However, the connection fails, because the server is establishing an IPv6 socket at ':ftp-data', not the expected IPv4 socket. The exchange goes like this: > ls 200 EPRT command successful 425 Unable to build data connection: Invalid argument After reconfiguring the server to be IPv4-only, the EPRT is fully functional, as is to be expected. The proftpd-server was freshly installed for the purpose of testing different clients, so besides the setting "UseIPv6" nothing was ever changed in the configuration. At the moment I can trigger this error using a patched FTP client from GNU Inetutils. Since this patching works correctly against the OpenBSD FTP server (with PASV, EPSV, LPSV, PORT, EPRT, LPRT), I am personally convinced that the error lies in 'poftpd/modules/mod_core.c'. Granted some time I might be able to craft a Perl client to also trigger this error. Best regards, Mats Erik Andersson, DM -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
