Debian: Cannot access opened port in US from EU
Clash Royale CLAN TAG#URR8PPP
On debian 9 I have opened port 0.0.0.0:18000 using python 3, but I cannot access it from outside (target machine actively refused it). I have no firewalls.
I suspected that it might be because I'm using IPv4 and the server is in US while I'm trying to access it from EU via IPv4. But I tried IPv6 too and it's the same error message. I can normally access it via SSH over IPv4. Ports 80/443 also have normal access over IPv4 but it translates it into IPv6.
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp6 0 0 :::18000 :::* LISTEN 701/python3
tcp6 0 0 :::22 :::* LISTEN 552/sshd
tcp6 0 0 :::443 :::* LISTEN 572/apache2
tcp6 0 0 MY_SERVER_IPv4:443 MY-PC-IPv4:10991 ESTABLISHED 61154/apache2
Interesting thing is that using putty I successfully connected using SSH over IPv4 (without translation).
tcp 0 0 MY_SERVER_IPv4:22 MY-PC-IPv4:17085 ESTABLISHED 57796/sshd: root@no
Does anybody have an idea what can I do?
debian socket
asked Feb 16 at 18:02
BoyBoy
1287
add a comment |
On debian 9 I have opened port 0.0.0.0:18000 using python 3, but I cannot access it from outside (target machine actively refused it). I have no firewalls.
I suspected that it might be because I'm using IPv4 and the server is in US while I'm trying to access it from EU via IPv4. But I tried IPv6 too and it's the same error message. I can normally access it via SSH over IPv4. Ports 80/443 also have normal access over IPv4 but it translates it into IPv6.
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp6 0 0 :::18000 :::* LISTEN 701/python3
tcp6 0 0 :::22 :::* LISTEN 552/sshd
tcp6 0 0 :::443 :::* LISTEN 572/apache2
tcp6 0 0 MY_SERVER_IPv4:443 MY-PC-IPv4:10991 ESTABLISHED 61154/apache2
Interesting thing is that using putty I successfully connected using SSH over IPv4 (without translation).
tcp 0 0 MY_SERVER_IPv4:22 MY-PC-IPv4:17085 ESTABLISHED 57796/sshd: root@no
Does anybody have an idea what can I do?
debian socket
asked Feb 16 at 18:02
BoyBoy
1287
3
You may not have a firewall on that particular machine, but there may still be a firewall between your EU and US system that lets through SSH traffic, but blocks requests to other ports.
– Kusalananda
Feb 16 at 19:04
@Kusalananda Thx for the tip, I'll check with my service provider.
– Boy
Feb 16 at 19:05
1
I would probably start by runningnmapagainst the target system.
– Kusalananda
Feb 16 at 19:07
add a comment |
On debian 9 I have opened port 0.0.0.0:18000 using python 3, but I cannot access it from outside (target machine actively refused it). I have no firewalls.
I suspected that it might be because I'm using IPv4 and the server is in US while I'm trying to access it from EU via IPv4. But I tried IPv6 too and it's the same error message. I can normally access it via SSH over IPv4. Ports 80/443 also have normal access over IPv4 but it translates it into IPv6.
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp6 0 0 :::18000 :::* LISTEN 701/python3
tcp6 0 0 :::22 :::* LISTEN 552/sshd
tcp6 0 0 :::443 :::* LISTEN 572/apache2
tcp6 0 0 MY_SERVER_IPv4:443 MY-PC-IPv4:10991 ESTABLISHED 61154/apache2
Interesting thing is that using putty I successfully connected using SSH over IPv4 (without translation).
tcp 0 0 MY_SERVER_IPv4:22 MY-PC-IPv4:17085 ESTABLISHED 57796/sshd: root@no
Does anybody have an idea what can I do?
debian socket
asked Feb 16 at 18:02
BoyBoy
1287
On debian 9 I have opened port 0.0.0.0:18000 using python 3, but I cannot access it from outside (target machine actively refused it). I have no firewalls.
I suspected that it might be because I'm using IPv4 and the server is in US while I'm trying to access it from EU via IPv4. But I tried IPv6 too and it's the same error message. I can normally access it via SSH over IPv4. Ports 80/443 also have normal access over IPv4 but it translates it into IPv6.
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp6 0 0 :::18000 :::* LISTEN 701/python3
tcp6 0 0 :::22 :::* LISTEN 552/sshd
tcp6 0 0 :::443 :::* LISTEN 572/apache2
tcp6 0 0 MY_SERVER_IPv4:443 MY-PC-IPv4:10991 ESTABLISHED 61154/apache2
Interesting thing is that using putty I successfully connected using SSH over IPv4 (without translation).
tcp 0 0 MY_SERVER_IPv4:22 MY-PC-IPv4:17085 ESTABLISHED 57796/sshd: root@no
Does anybody have an idea what can I do?
debian socket
debian socket
asked Feb 16 at 18:02
BoyBoy
1287
asked Feb 16 at 18:02
BoyBoy
1287
edited Feb 16 at 20:01
Boy
asked Feb 16 at 18:02
BoyBoy
1287
asked Feb 16 at 18:02
BoyBoy
1287
asked Feb 16 at 18:02
BoyBoy
1287
1287
3
You may not have a firewall on that particular machine, but there may still be a firewall between your EU and US system that lets through SSH traffic, but blocks requests to other ports.
– Kusalananda
Feb 16 at 19:04
@Kusalananda Thx for the tip, I'll check with my service provider.
– Boy
Feb 16 at 19:05
1
I would probably start by runningnmapagainst the target system.
– Kusalananda
Feb 16 at 19:07
add a comment |
3
You may not have a firewall on that particular machine, but there may still be a firewall between your EU and US system that lets through SSH traffic, but blocks requests to other ports.
– Kusalananda
Feb 16 at 19:04
@Kusalananda Thx for the tip, I'll check with my service provider.
– Boy
Feb 16 at 19:05
1
I would probably start by runningnmapagainst the target system.
– Kusalananda
Feb 16 at 19:07
3
3
You may not have a firewall on that particular machine, but there may still be a firewall between your EU and US system that lets through SSH traffic, but blocks requests to other ports.
– Kusalananda
Feb 16 at 19:04
You may not have a firewall on that particular machine, but there may still be a firewall between your EU and US system that lets through SSH traffic, but blocks requests to other ports.
– Kusalananda
Feb 16 at 19:04
@Kusalananda Thx for the tip, I'll check with my service provider.
– Boy
Feb 16 at 19:05
@Kusalananda Thx for the tip, I'll check with my service provider.
– Boy
Feb 16 at 19:05
1
1
I would probably start by running
nmap against the target system.– Kusalananda
Feb 16 at 19:07
I would probably start by running
nmap against the target system.– Kusalananda
Feb 16 at 19:07
add a comment |
1 Answer
1
active
oldest
votes
As suggested in the comments, I checked with nmap:
nmap -p 18000 MY_SERVER_IP
and got:
STATE:
filtered
So I asked for control panel access and noticed that there is Firewall Policies of which I (because I'm inexperienced) wasn't aware of.
Problem solved. Thank you.
answered Feb 16 at 20:02
BoyBoy
1287
add a comment |
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As suggested in the comments, I checked with nmap:
nmap -p 18000 MY_SERVER_IP
and got:
STATE:
filtered
So I asked for control panel access and noticed that there is Firewall Policies of which I (because I'm inexperienced) wasn't aware of.
Problem solved. Thank you.
answered Feb 16 at 20:02
BoyBoy
1287
add a comment |
As suggested in the comments, I checked with nmap:
nmap -p 18000 MY_SERVER_IP
and got:
STATE:
filtered
So I asked for control panel access and noticed that there is Firewall Policies of which I (because I'm inexperienced) wasn't aware of.
Problem solved. Thank you.
answered Feb 16 at 20:02
BoyBoy
1287
add a comment |
As suggested in the comments, I checked with nmap:
nmap -p 18000 MY_SERVER_IP
and got:
STATE:
filtered
So I asked for control panel access and noticed that there is Firewall Policies of which I (because I'm inexperienced) wasn't aware of.
Problem solved. Thank you.
answered Feb 16 at 20:02
BoyBoy
1287
As suggested in the comments, I checked with nmap:
nmap -p 18000 MY_SERVER_IP
and got:
STATE:
filtered
So I asked for control panel access and noticed that there is Firewall Policies of which I (because I'm inexperienced) wasn't aware of.
Problem solved. Thank you.
answered Feb 16 at 20:02
BoyBoy
1287
edited Feb 16 at 20:08
answered Feb 16 at 20:02
BoyBoy
1287
answered Feb 16 at 20:02
BoyBoy
1287
answered Feb 16 at 20:02
BoyBoy
1287
1287
add a comment |
add a comment |
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3
You may not have a firewall on that particular machine, but there may still be a firewall between your EU and US system that lets through SSH traffic, but blocks requests to other ports.
– Kusalananda
Feb 16 at 19:04
@Kusalananda Thx for the tip, I'll check with my service provider.
– Boy
Feb 16 at 19:05
1
I would probably start by running
nmapagainst the target system.– Kusalananda
Feb 16 at 19:07