Pure-FTPD cannot connect with TLS/SSL

Pure-FTPD cannot connect with TLS/SSL. FileZilla log shows this and then everything stop/halt

Status: Resolving address of ftp.mydomain.com
Status: Connecting to XXX.XXX.XXX.XXX:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...

When restarting pure-ftpd in WHM and this reveals the following message
...
Feb 22 23:14:47 host pure-ftpd[20248]: (?@?) [DEBUG] Couldn't load the DH parameters file /etc/ssl/private/pure-ftpd-dhparams.pem
pureftpd restarted successfully.

To solve the issue run the following commands :

openssl dhparam -out /etc/ssl/private/pure-ftpd-dhparams.pem 2048
/scripts/restartsrv_pureftpd

Migrasi Server USA 13-11-2018

Sehubungan akan dilakukan maintenance server hosting USA, maka kami informasikan bahwa akan dilakukan migrasi server hosting USA pada hari ini Selasa 13-11-2018 mulai pukul 17.00 WIB.
Akan terjadi pergantian IP address dari semula 207.244.157.188 menjadi 74.222.14.66.

Bila anda menggunakan NS kami sesuai prosedur yang diberikan di email aktifasi maka anda tidak perlu melakukan perubahan apapun di DNS record domain anda.

Akan tetapi bila anda menggunakan NS selain yang disebutkan di atas maka anda harus mengubah A record domain anda dari semula 207.244.157.188 menjadi 74.222.14.66.

Demikian disampaikan, mohon maaf atas ketidaknyamanan ini dan terima kasih atas kerjasama dan kepercayaan anda kepada Whplus selama ini.

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How to disable IPv6 on CentOS 7

To verify if IPv6 is enabled or not, execute :

# ifconfig -a | grep inet6
inet6 fe80::211:aff:fe6a:9de4 prefixlen 64 scopeid 0x20
inet6 ::1 prefixlen 128 scopeid 0x10[host]

1. Disable IPv6 in kernel module (requires reboot)
1. Edit /etc/default/grub and add ipv6.disable=1 in line GRUB_CMDLINE_LINUX, e.g.:

# cat /etc/default/grub
GRUB_TIMEOUT=5
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="ipv6.disable=1 crashkernel=auto rhgb quiet"
GRUB_DISABLE_RECOVERY="true"

2. Regenerate a GRUB configuration file and overwrite existing one:

# grub2-mkconfig -o /boot/grub2/grub.cfg

3. Restart system and verify no line “inet6” in “ip addr show” command output.

# shutdown -r now

# ip addr show | grep net6
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