sesman-Xvnc doesn't connect over xrdp

Question

i'm trying to enable remote desktop on my xubuntu machine with xrdp.

I am on a (pretty much) vanilla xubuntu install. I installed xrdp with apt-get.

My xrdp config looks like this:

[xrdp1]
name=sesman-Xvnc
lib=libvnc.so
username=ask
password=ask
ip=127.0.0.1
port=-1

netstat -ato shows that something is listening on port 3350 at least:

tcp        0      0 localhost:3350          *:*                     LISTEN      off (0.00/0/0)

I am able to connect over port 3389 to the xrdp screen, where I choose the sesman-Xvnc option, and enter my username and password. The Connection Log window then comes up saying

connecting to sesman ip 127.0.0.1 port 3350

Then it sits there forever. I am able to click the OK button and exit at any time.

Why doesn't it connect?

Solution 1

Ugh. Somehow, I never realised that localhost wasn't immune to the firewall.

I added an iptables rule for the localhost interface, and now it works.

iptables -A INPUT -p tcp -m multiport --destination-ports 3350 -i lo -j ACCEPT

In the future I'll use this rule to make sure all localhost traffic is allowed:

iptables -A INPUT -p tcp -i lo -j ACCEPT

Solution 2

These two steps will sort out your issue:

sudo apt-get install tightvncserver
gsettings set org.gnome.Vino require-encryption false

Comments

[Triamus]

exactly my problem. not sure how iptables is connected but it worked.

[Shrout1]

Remember to change ip6tables rules if you are using RDP from an ipv6 address (which my Win 10 box decided to use). My default drop policy ended up biting me with this. Also don't forget iptables-save > /etc/iptables/rules.v4 and ip6tables-save > /etc/iptables/rules.v6