proftps actvie vs passive - SERP Analysis

http://www.proftpd.org/docs/howto/NAT.html

https://www.jscape.com/blog/active-v-s-passive-ftp-simplified

https://superuser.com/questions/1254391/how-to-force-proftpd-to-use-passive-mode-by-default

https://forum.netgate.com/topic/87346/proftpd-active-passive-error

https://forums.proftpd.org/smf/index.php?topic=6805.0

https://proftp-user.narkive.com/OzpNgAlu/proftpd-user-how-to-set-active-passive-mode

https://stackoverflow.com/questions/1699145/what-is-the-difference-between-active-and-passive-ftp

https://support.hostway.com/hc/en-us/articles/360000563730-How-to-enable-passive-FTP-connections-in-ProFTPD

https://serverfault.com/questions/591704/proftpd-server-behind-firewall-returns-internal-ip-address

https://www.matraex.com/2017/10/14/proftpd-passiveports-requirements-or-not-working/

https://slacksite.com/other/ftp.html

http://www.proftpd.org/docs/howto/Limit.html

https://ics.uci.edu/~sources/proftpd/1.2.10/howto/NAT.html

https://www.slacksite.com/other/ftp-appendix1.html

https://docs.cpanel.net/knowledge-base/ftp/how-to-enable-ftp-passive-mode/

https://superuser.com/questions/1619783/which-mode-is-more-security-friendly-active-or-passive

https://support.plesk.com/hc/en-us/articles/12377959345687-How-to-configure-the-passive-ports-range-for-ProFTPd-on-a-Plesk-server-behind-a-firewall

https://serverfault.com/questions/643083/proftpd-and-firewall-configuration-for-passiveports

http://www.proftpd.org/docs/howto/ConfigurationTricks.html

https://stackoverflow.com/questions/5479308/how-to-change-proftpd-port-without-using-passive-mode

https://sive.host/index.php/knowledgebase/165/How-to-Enable-FTP-Passive-Mode.html

https://bobcares.com/blog/proftpd-passive-ports/

https://forums.freebsd.org/threads/ftp-server-access.61919/

https://vercaa.com/index.php?rp=/knowledgebase/228/Enabling-FTP-Passive-Mode-in-cPanel-Step-by-Step-Guide.html

https://proftp-user.narkive.com/n2nfdLRc/proftpd-user-issues-with-active-mode-and-my-config

https://arstechnica.com/civis/threads/proftpd-passive-ftp-issues.301388/

https://forum.howtoforge.com/threads/proftpd-and-passive-mode.28490/

https://www.ajohnstone.com/setting-up-an-ftp-server-with-proftpd-on-ec2-2/

https://wiki.dd-wrt.com/wiki/index.php/ProFTPd

https://forums.debian.net/viewtopic.php?t=154102

https://forums.gentoo.org/viewtopic-t-723767-start-0.html

http://www.proftpd.org/docs/howto/FTP.html

https://www.linuxquestions.org/questions/linux-server-73/ftp-server-with-proftpd-701484/

https://www.youtube.com/watch?v=dRTx0zLYRcU

https://forums.freebsd.org/threads/connections-from-windows-client-to-ftp-server-with-proftp.20691/

https://www.pc-freak.net/blog/fix-ftp-active-connection-issues-create-data-connection-route-host-proftpd-linux-dedicated-server/

https://archive.virtualmin.com/node/2682

https://www.haproxy.com/documentation/haproxy-configuration-tutorials/protocol-support/passive-ftp/

http://www.proftpd.org/docs/howto/FXP.html

https://www.neowin.net/forum/topic/641213-proftpd-disabling-the-passive-mode/

https://talk.plesk.com/threads/rule-in-fail2ban-for-proftpd-passive-mode-ports-30000-30400.336959/

https://www.linuxquestions.org/questions/linux-server-73/proftpd-and-passive-ports-790390/

https://forum.virtualmin.com/t/ubuntu-16-04-proftpd-passive-mode-ko-address-unknow/57226

https://sourceforge.net/p/proftp/mailman/message/15584345/

https://www.librebyte.net/en/ftp-en/passive-connections-in-proftpd/

http://www.proftpd.org/docs/howto/ConfigFile.html

https://galaxyproject.org/admin/config/proftpd-with-ad/

https://forum.hestiacp.com/t/hestiacp-with-proftpd-passive-mode-external-ip/8623

https://github.com/proftpd/proftpd/issues/1341

https://shape.host/resources/how-to-install-ftp-server-with-proftpd-and-secure-it-with-tls-ssl-on-debian-12

https://forum.directadmin.com/threads/how-to-set-up-your-proftpd-ftp-server-to-support-the-secure-protocols-while-disabling-insecure-ftp.65025/

http://radio.userland.com/discuss/msgReader%2420730?d=11&m=5&mode=topic&y=2025

https://developers.cloudflare.com/spectrum/about/ftp/

https://hub.docker.com/r/kibatic/proftpd

https://www.linuxhowtos.org/Misc/ftpmodes.htm

http://ccp14.cryst.bbk.ac.uk/ccp14admin/proftpd/index.html

http://www.etcfstab.com/misc/proftpd.html

https://kitson-consulting.co.uk/blog/proftpd-login-successful-data-connection-refused

https://linuxlasse.net/linux/howtos/ProFTPD_as_FTPS_with_TLS_/_SSL

https://forum.netgate.com/topic/52860/ftp-server-behind-pfsense-passive-transfer-problem

https://forums.rockylinux.org/t/problem-with-proftpd/17841

https://www.liquidweb.com/blog/install-proftpd-almalinux/

https://www.cosmos.esa.int/documents/772136/977578/psa_activeVsPassiveFtp.pdf/5e36a7b8-8732-4e65-ab6b-6cf94a742ea6

http://www.proftpd.org/docs/howto/AWS.html

https://www.hostcarts.com/info/how-to-enable-ftp-passive-mode

http://reg.163.com/faq.html

https://community.ipfire.org/t/ftp-problems-on-core-155-alg-ftp-remove-responsible/5043

https://www.reddit.com/r/linuxquestions/comments/pufhdd/can_someone_explain_why_ufw_is_blocking_proftpd/

https://www.netspaceindia.com/active-passive-ftp-port-server/?srsltid=AfmBOopJAJD8G-_sGnwRZv591EYB1UoUt_qIOsAAYWg8Nb-vR1r-OsFs

https://github.com/proftpd/proftpd/issues/1171

https://community.fortinet.com/t5/Fortinet-Forum/FTP-passive-Mode-problem/m-p/131447

https://www.turnkeylinux.org/forum/support/20140825/proftpd-setup-and-configuration

https://unix.stackexchange.com/questions/368587/while-stop-working-active-mode-ftp-after-change-server-port

https://www.brainware.ro/2015/10/proftpd-and-ftps/

https://help.univention.com/t/proftpd-ldap-authentication-doesnt-show-up/8571

https://www.nexsens.com/knowledge-base-v2/software/wqdatalive/faq/what-is-the-difference-between-active-ftp-and-passive-ftp

https://askubuntu.com/questions/1247078/failed-to-retrieve-directory-listing-with-proftp-in-passive-mode

http://www.linuxweblog.com/blogs/sandip/20090612/configure-passive-ports-range-proftpd

https://community.spiceworks.com/t/proftpd-making-it-ftps-or-sftp/510421

https://ftp.lip6.fr/pub/networking/proftpd/docs/userguide.html

https://www.v-front.de/2012/11/release-proftpd-ftp-server-for-vmware.html

https://www.shkodenko.com/linux-ftp-proftpd-server-configuration-setup-timeouts/

https://monovm.com/blog/ftp-active-vs-passive/

https://hub.docker.com/r/serversideup/proftpd

https://forums.raspberrypi.com/viewtopic.php?t=200186

https://forum.hestiacp.com/t/proftp-no-longer-working/16396

https://support.cpanel.net/hc/en-us/community/posts/19149775381399-FTP-Stuck-at-passive-connection-port-while-ports-are-open

http://www.proftpd.org/docs/

https://forum.vestacp.com/viewtopic.php?t=18539

https://calomel.org/proftpd.html

https://www.ionos.com/digitalguide/server/know-how/ftp-ports/

https://forums.unraid.net/topic/24356-proftpd-plugin-for-unraid-v68x/page/31/

https://www.webhostingtalk.com/showthread.php?t=656749

https://forum.dd-wrt.com/forum/viewtopic.php?p=992239&sid=f2532faf4b12eab7df6ebe7570a2334b

https://forums.linuxmint.com/viewtopic.php?t=195489

https://unix.stackexchange.com/questions/422594/proftpd-kills-session-with-421-timeout-error-message

https://docs.fortinet.com/document/fortigate/7.4.0/new-features/132552/changing-the-ftp-mode-from-active-to-passive-for-explicit-proxy

https://support.hostway.com/hc/en-us/articles/360000564410-How-to-enable-passive-FTP-connections-in-vsftpd

https://hostcarts.ae/info/how-to-enable-ftp-passive-mode