Linux systems sometimes remount the root file system as read-only, e.g. if there's an I/O error.
I have a machine that becomes useless when this happens, and I end up rebooting it manually.
Is there a way to make Linux just automatically reboot when this happens? A read-only mount is useless to me.
I have a router with public IP address ADDR and private IP address 192.168.1.1.
I also have a public domain DOMAIN with an A record pointing to ADDR.
The router has a built-in SMB server.
I can access the SMB shares internally by typing \\ADDR\ShareName into Windows Explorer.
However, I want to be able to also access them via \\DOMAIN\ShareName internally.
Currently this doesn't work because Samba is not listening on the public interface. It only listens on the private interface, and I obviously don't want to change this and introduce a security hole.
So I redirect port 445 of ADDR to 192.168.1.1 when the source is in the local subnet:
iptables -t nat -I PREROUTING 1 -s 192.168.0.0/16 -p tcp --dport 445 -j DNAT --to-destination 192.168.1.1:445
but this doesn't work for some reason, and I don't understand why. (I don't know iptables well.)
Why doesn't this work? And how can I make it work?
(And yes, cat /proc/sys/net/ipv4/ip_forward gives 1.)
I'm trying to use SMTP to send mail to my account on some server (say, on Gmail).
So far I've tried:
220 mx.google.com ESMTP y14sm3079810ibf.45
HELO
250 mx.google.com at your service
STARTTLS
220 2.0.0 Ready to start TLS
AUTH LOGIN
Connection closed by foreign host.
What am I doing wrong, and how can I fix it so I send an email as though I were my own server?