Does anyone know how to allow ssh port in VULTR?

JohnRoe

help me, Im trying to set different port for SSH. I tried many ways editing iptables. but still cant connect to the server.
Now, Im still connected to the server via existng session. But cant create new session.

I flushed iptables.. Hope someone can help me before this last session got disconnected.
Even ssh into port 22 wont work

trewq

You can always use the console in the Vultr control panel.

What rules do you have set for iptables at the moment?

JohnRoe

@trewq iptables flushed.. no rules has been added.
I dont know why but console wont work after I flushed the iptables

myhken

I just use these three commands to change SSH port on any server.

1: vi /etc/ssh/sshd_config
2: Port 1234
3: service sshd restart

Can't be any simpler.

JohnRoe

@myhken said:
I just use these three commands to change SSH port on any server.

1: vi /etc/ssh/sshd_config
2: Port 1234
3: service sshd restart

Can't be any simpler.

I just realized that disabling iptables would make the ssh working again..

iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 41000 -j ACCEPT

why rule above wont work?

jar

Without looking at your system, try iptables -I instead of -A. Adding it below a relevant deny rule wouldn't help, for example, where -A appends to the bottom of the chain.

Mark_R

maybe use UFW next time? i myself find iptables confusing too and UFW makes things alot easier. Using this command "ufw allow 41000/tcp" would have allowed the port.

DH22

This is what my ssh related iptable entries look like based on whatever guides I found online when I made them.. seems to work fine:

-A INPUT -p tcp -m state --state NEW --dport [SSH port] -j ACCEPT

followed by..

-A INPUT -j DROP

-A FORWARD -j DROP

edit: followed Linode guide to securing server at https://www.linode.com/docs/security/securing-your-server/#creating-a-firewall

Abdussamad

I prefer to set the default to drop:

iptables -P INPUT DROP

Then allow ssh like this:

iptables -I INPUT -p tcp --dport 22 -j ACCEPT