Unable to access django server on debian running FusionPBX - linux

Question

I have a Debian server running fusionPBX, I installed it using this official script. It uses nginx to host the application, I tried adding another server (Django) in the config file of nginx to support another server that's running on the same machine. Still, I can't access the Django server.
I tried opening port 8000 using the command sudo ufw allow 8000
When I use Nmap from another machine to this FusionPBX server I do see the ports.
$ nmap ipaddrress
Starting Nmap 7.80 ( https://nmap.org ) at 2022-12-16 20:54 UTC
Nmap scan report for ipaddrress.de-fra1.upcloud.host (ipaddrress)
Host is up (0.00015s latency).
Not shown: 992 closed ports
PORT STATE SERVICE
22/tcp open ssh
80/tcp open http
443/tcp open https
5060/tcp open sip
5080/tcp open onscreen
7443/tcp open oracleas-https
8000/tcp open http-alt
8001/tcp open vcom-tunnel
Nmap done: 1 IP address (1 host up) scanned in 0.19 seconds
Even if I start the server using the normal command python manage.py runserver 0.0.0.0:8000 or
python manage.py runserver 127.0.0.1:8000 It doesn't work.
In Ubuntu, all I have to do is sudo ufw allow 8000 and then python manage.py runserver 0.0.0.0:8000 and it works as expected.
python manage.py runserver 0.0.0.0:8000 this is how we start a django server, where 0.0.0.0 is the IP and 8000 is the port. just in case anyone is confused :)
My Nginx config
server {
listen 127.0.0.1:80;
server_name 127.0.0.1;
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
client_max_body_size 80M;
client_body_buffer_size 128k;
location / {
root /var/www/fusionpbx;
index index.php;
}
location ~ \.php$ {
fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
#fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME /var/www/fusionpbx$fastcgi_script_name;
}
# Allow the upgrade routines to run longer than normal
location = /core/upgrade/index.php {
fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
#fastcgi_pass 127.0.0.1:9000;
fastcgi_read_timeout 15m;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME /var/www/fusionpbx$fastcgi_script_name;
}
# Disable viewing .htaccess & .htpassword & .db & .git
location ~ .htaccess {
deny all;
}
location ~ .htpassword {
deny all;
}
location ~^.+.(db)$ {
deny all;
}
location ~ /\.git {
deny all;
}
location ~ /\.lua {
deny all;
}
location ~ /\. {
deny all;
}
}
server {
listen 80;
server_name fusionpbx;
#redirect letsencrypt to dehydrated
location ^~ /.well-known/acme-challenge {
default_type "text/plain";
auth_basic "off";
alias /var/www/dehydrated;
}
#rewrite rule - send to https with an exception for provisioning
if ($uri !~* ^.*(provision|xml_cdr|firmware).*$) {
rewrite ^(.*) https://$host$1 permanent;
break;
}
#REST api
if ($uri ~* ^.*/api/.*$) {
rewrite ^(.*)/api/(.*)$ $1/api/index.php?rewrite_uri=$2 last;
break;
}
#algo
rewrite "^.*/provision/algom([A-Fa-f0-9]{12})\.conf" /app/provision/?mac=$1&file=algom%7b%24mac%7d.conf last;
#mitel
rewrite "^.*/provision/MN_([A-Fa-f0-9]{12})\.cfg" /app/provision/index.php?mac=$1&file=MN_%7b%24mac%7d.cfg last;
rewrite "^.*/provision/MN_Generic.cfg" /app/provision/index.php?mac=08000f000000&file=MN_Generic.cfg last;
#grandstream
rewrite "^.*/provision/cfg([A-Fa-f0-9]{12})(\.(xml|cfg))?$" /app/provision/?mac=$1;
rewrite "^.*/provision/([A-Fa-f0-9]{12})/phonebook\.xml$" /app/provision/?mac=$1&file=phonebook.xml;
rewrite "^.*/provision/(phonebook\.xml)?$" /app/provision/index.php?file=$1 last;
#grandstream-wave softphone by ext because Android doesn't pass MAC.
rewrite "^.*/provision/([0-9]{5})/cfg([A-Fa-f0-9]{12}).xml$" /app/provision/?ext=$1;
#aastra
rewrite "^.*/provision/aastra.cfg$" /app/provision/?mac=$1&file=aastra.cfg;
#rewrite "^.*/provision/([A-Fa-f0-9]{12})(\.(cfg))?$" /app/provision/?mac=$1 last;
#yealink
#rewrite "^.*/provision/(y[0-9]{12})(\.cfg|\.boot)?$" /app/provision/index.php?file=$1$2;
rewrite "^.*/provision/(y[0-9]{12})(\.cfg)?$" /app/provision/index.php?file=$1.cfg;
rewrite "^.*/provision/([A-Fa-f0-9]{12})(\.(xml|cfg))?$" /app/provision/index.php?mac=$1 last;
#polycom
rewrite "^.*/provision/000000000000.cfg$" "/app/provision/?mac=$1&file={%24mac}.cfg";
#rewrite "^.*/provision/sip_330(\.(ld))$" /includes/firmware/sip_330.$2;
rewrite "^.*/provision/features.cfg$" /app/provision/?mac=$1&file=features.cfg;
rewrite "^.*/provision/([A-Fa-f0-9]{12})-sip.cfg$" /app/provision/?mac=$1&file=sip.cfg;
rewrite "^.*/provision/([A-Fa-f0-9]{12})-phone.cfg$" /app/provision/?mac=$1;
rewrite "^.*/provision/([A-Fa-f0-9]{12})-registration.cfg$" "/app/provision/?mac=$1&file={%24mac}-registration.cfg";
rewrite "^.*/provision/([A-Fa-f0-9]{12})-directory.xml$" "/app/provision/?mac=$1&file={%24mac}-directory.xml";
#cisco
rewrite "^.*/provision/file/(.*\.(xml|cfg))" /app/provision/?file=$1 last;
rewrite "^.*/provision/directory\.xml$" /app/provision/?file=directory.xml;
#Escene
rewrite "^.*/provision/([0-9]{1,11})_Extern.xml$" "/app/provision/?ext=$1&file={%24mac}_extern.xml" last;
rewrite "^.*/provision/([0-9]{1,11})_Phonebook.xml$" "/app/provision/?ext=$1&file={%24mac}_phonebook.xml" last;
#Vtech
rewrite "^.*/provision/VCS754_([A-Fa-f0-9]{12})\.cfg$" /app/provision/?mac=$1;
rewrite "^.*/provision/pb([A-Fa-f0-9-]{12,17})/directory\.xml$" /app/provision/?mac=$1&file=directory.xml;
#Digium
rewrite "^.*/provision/([A-Fa-f0-9]{12})-contacts\.cfg$" "/app/provision/?mac=$1&file={%24mac}-contacts.cfg";
rewrite "^.*/provision/([A-Fa-f0-9]{12})-smartblf\.cfg$" "/app/provision/?mac=$1&file={%24mac}-smartblf.cfg";
#Snom
rewrite "^.*/provision/-([A-Fa-f0-9]{12})?$" /app/provision/index.php?mac=$1;
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
client_max_body_size 80M;
client_body_buffer_size 128k;
location / {
root /var/www/fusionpbx;
index index.php;
}
location ~ \.php$ {
fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
#fastcgi_pass 127.0.0.1:9000;
fastcgi_read_timeout 15m;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME /var/www/fusionpbx$fastcgi_script_name;
}
# Allow the upgrade routines to run longer than normal
location = /core/upgrade/index.php {
fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
#fastcgi_pass 127.0.0.1:9000;
fastcgi_read_timeout 15m;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME /var/www/fusionpbx$fastcgi_script_name;
}
# Disable viewing .htaccess & .htpassword & .db & .git
location ~ .htaccess {
deny all;
}
location ~ .htpassword {
deny all;
}
location ~^.+.(db)$ {
deny all;
}
location ~ /\.git {
deny all;
}
location ~ /\.lua {
deny all;
}
location ~ /\. {
deny all;
}
}
server {
listen 443 ssl;
#listen 443 ssl http2;
server_name fusionpbx;
ssl_certificate /etc/ssl/certs/nginx.crt;
ssl_certificate_key /etc/ssl/private/nginx.key;
#ssl_protocols TLSv1.2 TLSv1.3;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3;
ssl_ciphers DHE-RSA-AES256-SHA:AES256-SHA:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
ssl_session_cache shared:SSL:40m;
ssl_session_timeout 2h;
ssl_session_tickets off;
#redirect letsencrypt to dehydrated
location ^~ /.well-known/acme-challenge {
default_type "text/plain";
auth_basic "off";
alias /var/www/dehydrated;
}
#REST api
if ($uri ~* ^.*/api/.*$) {
rewrite ^(.*)/api/(.*)$ $1/api/index.php?rewrite_uri=$2 last;
break;
}
#message media
rewrite "^/app/messages/media/(.*)/(.*)" /app/messages/message_media.php?id=$1&action=download last;
#algo
rewrite "^.*/provision/algom([A-Fa-f0-9]{12})\.conf" /app/provision/?mac=$1&file=algom%7b%24mac%7d.conf last;
#mitel
rewrite "^.*/provision/MN_([A-Fa-f0-9]{12})\.cfg" /app/provision/index.php?mac=$1&file=MN_%7b%24mac%7d.cfg last;
rewrite "^.*/provision/MN_Generic.cfg" /app/provision/index.php?mac=08000f000000&file=MN_Generic.cfg last;
#grandstream
rewrite "^.*/provision/cfg([A-Fa-f0-9]{12})(\.(xml|cfg))?$" /app/provision/?mac=$1;
rewrite "^.*/provision/([A-Fa-f0-9]{12})/phonebook\.xml$" /app/provision/?mac=$1&file=phonebook.xml;
rewrite "^.*/provision/(phonebook\.xml)?$" /app/provision/index.php?file=$1 last;
#grandstream-wave softphone by ext because Android doesn't pass MAC.
rewrite "^.*/provision/([0-9]{5})/cfg([A-Fa-f0-9]{12}).xml$" /app/provision/?ext=$1;
#aastra
rewrite "^.*/provision/aastra.cfg$" /app/provision/?mac=$1&file=aastra.cfg;
#rewrite "^.*/provision/([A-Fa-f0-9]{12})(\.(cfg))?$" /app/provision/?mac=$1 last;
#yealink
#rewrite "^.*/provision/(y[0-9]{12})(\.cfg|\.boot)?$" /app/provision/index.php?file=$1$2;
rewrite "^.*/provision/(y[0-9]{12})(\.cfg)?$" /app/provision/index.php?file=$1.cfg;
rewrite "^.*/provision/([A-Fa-f0-9]{12})(\.(xml|cfg))?$" /app/provision/index.php?mac=$1 last;
#polycom
rewrite "^.*/provision/000000000000.cfg$" "/app/provision/?mac=$1&file={%24mac}.cfg";
#rewrite "^.*/provision/sip_330(\.(ld))$" /includes/firmware/sip_330.$2;
rewrite "^.*/provision/features.cfg$" /app/provision/?mac=$1&file=features.cfg;
rewrite "^.*/provision/([A-Fa-f0-9]{12})-sip.cfg$" /app/provision/?mac=$1&file=sip.cfg;
rewrite "^.*/provision/([A-Fa-f0-9]{12})-phone.cfg$" /app/provision/?mac=$1;
rewrite "^.*/provision/([A-Fa-f0-9]{12})-registration.cfg$" "/app/provision/?mac=$1&file={%24mac}-registration.cfg";
rewrite "^.*/provision/([A-Fa-f0-9]{12})-directory.xml$" "/app/provision/?mac=$1&file={%24mac}-directory.xml";
#cisco
rewrite "^.*/provision/file/(.*\.(xml|cfg))" /app/provision/?file=$1 last;
rewrite "^.*/provision/directory\.xml$" /app/provision/?file=directory.xml;
#Escene
rewrite "^.*/provision/([0-9]{1,11})_Extern.xml$" "/app/provision/?ext=$1&file={%24mac}_extern.xml" last;
rewrite "^.*/provision/([0-9]{1,11})_Phonebook.xml$" "/app/provision/?ext=$1&file={%24mac}_phonebook.xml" last;
#Vtech
rewrite "^.*/provision/VCS754_([A-Fa-f0-9]{12})\.cfg$" /app/provision/?mac=$1;
rewrite "^.*/provision/pb([A-Fa-f0-9-]{12,17})/directory\.xml$" /app/provision/?mac=$1&file=directory.xml;
#Digium
rewrite "^.*/provision/([A-Fa-f0-9]{12})-contacts\.cfg$" "/app/provision/?mac=$1&file={%24mac}-contacts.cfg";
rewrite "^.*/provision/([A-Fa-f0-9]{12})-smartblf\.cfg$" "/app/provision/?mac=$1&file={%24mac}-smartblf.cfg";
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
client_max_body_size 80M;
client_body_buffer_size 128k;
location / {
root /var/www/fusionpbx;
index index.php;
}
location ~ \.php$ {
fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
#fastcgi_pass 127.0.0.1:9000;
fastcgi_read_timeout 15m;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME /var/www/fusionpbx$fastcgi_script_name;
}
# Allow the upgrade routines to run longer than normal
location = /core/upgrade/index.php {
fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
#fastcgi_pass 127.0.0.1:9000;
fastcgi_read_timeout 15m;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME /var/www/fusionpbx$fastcgi_script_name;
}
# Disable viewing .htaccess & .htpassword & .db & .git
location ~ .htaccess {
deny all;
}
location ~ .htpassword {
deny all;
}
location ~^.+.(db)$ {
deny all;
}
location ~ /\.git {
deny all;
}
location ~ /\.lua {
deny all;
}
location ~ /\. {
deny all;
}
}
server {
listen 8000;
server_name 127.0.0.1 0.0.0.0 fusionpbx 94.237.97.9;
location = /favicon.ico { access_log off; log_not_found off; }
location /static/ {
root /home/freeswitch/freeswitch_api/django_api;
}
location / {
include proxy_params;
proxy_pass http://unix:/home/freeswitch/freeswitch_api/django_api/django_api.sock;
}
}
The block that I added
server {
listen 8000;
server_name (IP OF MY SERVER);
location = /favicon.ico { access_log off; log_not_found off; }
location /static/ {
root /home/freeswitch/freeswitch_api/django_api;
}
location / {
include proxy_params;
proxy_pass http://unix:/home/freeswitch/freeswitch_api/django_api/django_api.sock;
}
}
Is FusionPBX blocking the connection in some way?
I don't know what I'm missing, any help is appreciated.
UPDATE:
so I tried opening the port using iptables, here is what I did
sudo iptables -A INPUT -p tcp --dport 8000 -j ACCEPT
sudo iptables-save
sudo service iptables restart
The Outputs
$ sudo iptables-save
sudo: unable to resolve host debian-1cpu-1gb-de-fra1: Name or service not known
# Generated by iptables-save v1.8.7 on Fri Dec 16 22:39:51 2022
*filter
:INPUT DROP [1:44]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [350:25243]
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "friendly-scanner" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "friendly-scanner" --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "sipcli/" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "sipcli/" --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "VaxSIPUserAgent/" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "VaxSIPUserAgent/" --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "pplsip" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "pplsip" --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "system " --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "system " --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "exec." --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "exec." --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "multipart/mixed;boundary" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "multipart/mixed;boundary" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 7443 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 5060:5091 -j ACCEPT
-A INPUT -p udp -m udp --dport 5060:5091 -j ACCEPT
-A INPUT -p udp -m udp --dport 16384:32768 -j ACCEPT
-A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
-A INPUT -p udp -m udp --dport 1194 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 8000 -j ACCEPT
COMMIT
# Completed on Fri Dec 16 22:39:51 2022
# Generated by iptables-save v1.8.7 on Fri Dec 16 22:39:51 2022
*mangle
:PREROUTING ACCEPT [8231:612573]
:INPUT ACCEPT [8231:612573]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [8325:642913]
:POSTROUTING ACCEPT [8325:642913]
-A OUTPUT -p udp -m udp --sport 16384:32768 -j DSCP --set-dscp 0x2e
-A OUTPUT -p udp -m udp --sport 5060:5091 -j DSCP --set-dscp 0x1a
-A OUTPUT -p tcp -m tcp --sport 5060:5091 -j DSCP --set-dscp 0x1a
COMMIT
# Completed on Fri Dec 16 22:39:51 2022
sudo iptables -L
$ sudo iptables -L
sudo: unable to resolve host debian-1cpu-1gb-de-fra1: Name or service not known
Chain INPUT (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
DROP udp -- anywhere anywhere udp dpts:sip:5091 STRING match "friendly-scanner" ALGO name bm TO 65535 ICASE
DROP tcp -- anywhere anywhere tcp dpts:sip:5091 STRING match "friendly-scanner" ALGO name bm TO 65535 ICASE
DROP udp -- anywhere anywhere udp dpts:sip:5091 STRING match "sipcli/" ALGO name bm TO 65535 ICASE
DROP tcp -- anywhere anywhere tcp dpts:sip:5091 STRING match "sipcli/" ALGO name bm TO 65535 ICASE
DROP udp -- anywhere anywhere udp dpts:sip:5091 STRING match "VaxSIPUserAgent/" ALGO name bm TO 65535 ICASE
DROP tcp -- anywhere anywhere tcp dpts:sip:5091 STRING match "VaxSIPUserAgent/" ALGO name bm TO 65535 ICASE
DROP udp -- anywhere anywhere udp dpts:sip:5091 STRING match "pplsip" ALGO name bm TO 65535 ICASE
DROP tcp -- anywhere anywhere tcp dpts:sip:5091 STRING match "pplsip" ALGO name bm TO 65535 ICASE
DROP udp -- anywhere anywhere udp dpts:sip:5091 STRING match "system " ALGO name bm TO 65535 ICASE
DROP tcp -- anywhere anywhere tcp dpts:sip:5091 STRING match "system " ALGO name bm TO 65535 ICASE
DROP udp -- anywhere anywhere udp dpts:sip:5091 STRING match "exec." ALGO name bm TO 65535 ICASE
DROP tcp -- anywhere anywhere tcp dpts:sip:5091 STRING match "exec." ALGO name bm TO 65535 ICASE
DROP udp -- anywhere anywhere udp dpts:sip:5091 STRING match "multipart/mixed;boundary" ALGO name bm TO 65535 ICASE
DROP tcp -- anywhere anywhere tcp dpts:sip:5091 STRING match "multipart/mixed;boundary" ALGO name bm TO 65535 ICASE
ACCEPT tcp -- anywhere anywhere tcp dpt:ssh
ACCEPT tcp -- anywhere anywhere tcp dpt:http
ACCEPT tcp -- anywhere anywhere tcp dpt:https
ACCEPT tcp -- anywhere anywhere tcp dpt:7443
ACCEPT tcp -- anywhere anywhere tcp dpts:sip:5091
ACCEPT udp -- anywhere anywhere udp dpts:sip:5091
ACCEPT udp -- anywhere anywhere udp dpts:16384:32768
ACCEPT icmp -- anywhere anywhere icmp echo-request
ACCEPT udp -- anywhere anywhere udp dpt:openvpn
Chain FORWARD (policy DROP)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
sudo iptables -S
$sudo iptables -S
sudo: unable to resolve host debian-1cpu-1gb-de-fra1: Name or service not known
-P INPUT DROP
-P FORWARD DROP
-P OUTPUT ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "friendly-scanner" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "friendly-scanner" --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "sipcli/" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "sipcli/" --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "VaxSIPUserAgent/" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "VaxSIPUserAgent/" --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "pplsip" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "pplsip" --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "system " --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "system " --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "exec." --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "exec." --algo bm --to 65535 --icase -j DROP
-A INPUT -p udp -m udp --dport 5060:5091 -m string --string "multipart/mixed;boundary" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 5060:5091 -m string --string "multipart/mixed;boundary" --algo bm --to 65535 --icase -j DROP
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 7443 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 5060:5091 -j ACCEPT
-A INPUT -p udp -m udp --dport 5060:5091 -j ACCEPT
-A INPUT -p udp -m udp --dport 16384:32768 -j ACCEPT
-A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
-A INPUT -p udp -m udp --dport 1194 -j ACCEPT
netstat
$ netstat -tulpn
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:44653 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN -
tcp 0 0 94.237.97.9:7443 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:8021 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp 0 0 94.237.97.9:5080 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:8001 0.0.0.0:* LISTEN 8542/python
tcp 0 0 94.237.97.9:5060 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:4040 0.0.0.0:* LISTEN 7759/./ngrok
tcp 0 0 94.237.97.9:5066 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:45931 0.0.0.0:* LISTEN 1346/node
tcp6 0 0 :::22 :::* LISTEN -
tcp6 0 0 ::1:5432 :::* LISTEN -
tcp6 0 0 ::1:25 :::* LISTEN -
tcp6 0 0 2a04:3542:1000:910:5060 :::* LISTEN -
udp 0 0 94.237.97.9:5080 0.0.0.0:* -
udp 0 0 0.0.0.0:68 0.0.0.0:* -
udp 0 0 0.0.0.0:68 0.0.0.0:* -
udp 0 0 0.0.0.0:161 0.0.0.0:* -
udp 0 0 94.237.97.9:5060 0.0.0.0:* -
udp6 0 0 2a04:3542:1000:910:5060 :::* -

Answer 1

Make sure that the Django server is running and listening on the correct IP address and port. You can check this by running the following command: netstat -tulpn
Check the logs of both the Django server and the nginx server for any error messages or clues about what might be causing the issue.
Verify that the nginx configuration file you added for the Django server is correct. Make sure that the server block is correctly configured to proxy requests to the Django server, and that the server block is enabled by including it in the http block.
Make sure that there are no firewall rules or other security measures in place that might be blocking access to the Django server.
I hope these suggestions help you get your Django server working with your FusionPBX installation. If you continue to have trouble, it might be helpful to provide more information about the specific steps you have taken and any error messages you have encountered.

Answer 2

I solved the problem. I'll leave the solution here for anyone who may come across the same. Actually, it was quite simple. I examined how FsuionPBX was installed and how they configured the iptables. Here's the script.
#!/bin/sh
#move to script directory so all relative paths work
cd "$(dirname "$0")"
#add the includes
. ./config.sh
. ./colors.sh
. ./environment.sh
#send a message
verbose "Configuring IPTables"
#defaults to nftables by default this enables iptables
if [ ."$os_codename" = ."buster" ]; then
update-alternatives --set iptables /usr/sbin/iptables-legacy
update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
fi
if [ ."$os_codename" = ."bullseye" ]; then
apt-get install -y iptables
update-alternatives --set iptables /usr/sbin/iptables-legacy
update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
fi
#remove ufw
ufw reset
ufw disable
apt-get remove -y ufw
#apt-get purge ufw
#run iptables commands
iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -j DROP -p udp --dport 5060:5091 -m string --string "friendly-scanner" --algo bm --icase
iptables -A INPUT -j DROP -p tcp --dport 5060:5091 -m string --string "friendly-scanner" --algo bm --icase
iptables -A INPUT -j DROP -p udp --dport 5060:5091 -m string --string "sipcli/" --algo bm --icase
iptables -A INPUT -j DROP -p tcp --dport 5060:5091 -m string --string "sipcli/" --algo bm --icase
iptables -A INPUT -j DROP -p udp --dport 5060:5091 -m string --string "VaxSIPUserAgent/" --algo bm --icase
iptables -A INPUT -j DROP -p tcp --dport 5060:5091 -m string --string "VaxSIPUserAgent/" --algo bm --icase
iptables -A INPUT -j DROP -p udp --dport 5060:5091 -m string --string "pplsip" --algo bm --icase
iptables -A INPUT -j DROP -p tcp --dport 5060:5091 -m string --string "pplsip" --algo bm --icase
iptables -A INPUT -j DROP -p udp --dport 5060:5091 -m string --string "system " --algo bm --icase
iptables -A INPUT -j DROP -p tcp --dport 5060:5091 -m string --string "system " --algo bm --icase
iptables -A INPUT -j DROP -p udp --dport 5060:5091 -m string --string "exec." --algo bm --icase
iptables -A INPUT -j DROP -p tcp --dport 5060:5091 -m string --string "exec." --algo bm --icase
iptables -A INPUT -j DROP -p udp --dport 5060:5091 -m string --string "multipart/mixed;boundary" --algo bm --icase
iptables -A INPUT -j DROP -p tcp --dport 5060:5091 -m string --string "multipart/mixed;boundary" --algo bm --icase
iptables -A INPUT -p tcp --dport 22 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j ACCEPT
iptables -A INPUT -p tcp --dport 7443 -j ACCEPT
iptables -A INPUT -p tcp --dport 5060:5091 -j ACCEPT
iptables -A INPUT -p udp --dport 5060:5091 -j ACCEPT
iptables -A INPUT -p udp --dport 16384:32768 -j ACCEPT
iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT
iptables -A INPUT -p udp --dport 1194 -j ACCEPT
iptables -t mangle -A OUTPUT -p udp -m udp --sport 16384:32768 -j DSCP --set-dscp 46
iptables -t mangle -A OUTPUT -p udp -m udp --sport 5060:5091 -j DSCP --set-dscp 26
iptables -t mangle -A OUTPUT -p tcp -m tcp --sport 5060:5091 -j DSCP --set-dscp 26
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT
#answer the questions for iptables persistent
echo iptables-persistent iptables-persistent/autosave_v4 boolean true | debconf-set-selections
echo iptables-persistent iptables-persistent/autosave_v6 boolean true | debconf-set-selections
apt-get install -y iptables-persistent
Now to open another port all I had to do was run the iptable command
iptables -A INPUT -p tcp --dport 8000 -j ACCEPT
and save the rules using
sudo /sbin/iptables-save > /etc/iptables/rules.v4
make sure to run it as root or you'll get the permission denied error.
In case you get the permission error you might want to run sudo su - before saving the rules.