Mustafa Chelik's questions

My laptop has 2 network interfaces: ethernet (eno1, 600 Metric) and wireless (wlo1, 1000 Metric)

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.200.100.1    0.0.0.0         UG    600    0        0 wlo1
10.200.100.0    0.0.0.0         255.255.255.0   U     600    0        0 wlo1
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 eno1
192.168.1.0     0.0.0.0         255.255.255.0   U     100    0        0 eno1

I receive multicast stream via ethernet (can confirm via wireshark) but when I try to render it using vlc, I can't. The reason is multicast gets subscribed via wlo1, not ethernet that stream is coming from.

IPv6/IPv4 Group Memberships
Interface       RefCnt Group
--------------- ------ ---------------------
lo              1      224.0.0.251
lo              1      all-systems.mcast.net
eno1            2      224.0.0.251
eno1            1      all-systems.mcast.net
wlo1            1      234.5.5.5  <------- MY STREAM

Why this happens? How can I force Linux to subscribe to multicast on ethernet? Any help is appreciated.

P.S. when I disable wireless, multicast doesn't subscribe at any interface at all.

I have a fresh Ubuntu 16.04 server and I have to create mail server on it. I followed this tutorial that uses postfix & dovecot. Now I am able to sent email from server using mail command to my personal email but Thunderbird fails to connect and configure my created email. Email related processes seems working:

tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:995 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:110 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:143 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN

It could be because of my DNS entries. I'm not expert at these concepts. If you can help me, I'll appreciate it a lot.

P.S. ufw is disabled

I want to send password to rdesktop so that it doesn't show up in ps. Is there any safe alternative for passing with command-line parameter? I even can develop an application for this if it helps. Any idea will be appreciated.

Thanks

I searched a lot and everyone says add these in config file and it will work:

location /my_directory {
    autoindex on;
}

I opened /etc/nginx/nginx.conf file and added it under http but service did not start. Added it under http -> server and received 403 forbidden error.

I have no idea about nginx. Can someone tell me easily about what should I do?

Thanks