Dedicated Servers not visible on Convoy Browser (not always...)

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dowmeister
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Dedicated Servers not visible on Convoy Browser (not always...)

#1 Post by dowmeister » 24 Jan 2023 18:45

Hi!

I'm hosting multiple servers in docker containers with --network host parameter but, not all of them are visible on Convoy Browser, i'm wondering someone can point me in the right direction (Vojtech Hladík please? :D). Currently i have more than 10 servers and only 3 are visibile in Servers list.

Both virtual machines are with public IP and directly connected to Internet, same Datacenter, the Hosting provider assured they are not blocking anything on their side, traffic goes directly to the machine.

The Docker Container are running also an ExpressJs Server on port 80 and on both container HTTP traffic is working, the NodeJS app returns data so the traffic, in both case, is going to the container, at least on port 80.

I've tried also disabling completely UFW.

Both servers are naturally using a Server Token.

Working server:

UFW status:

Code: Select all

ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing), allow (routed)
New profiles: skip

To                         Action      From
--                         ------      ----
22/tcp                     LIMIT IN    Anywhere                  
2375/tcp                   ALLOW IN    Anywhere                  
2376/tcp                   ALLOW IN    Anywhere                  
80                         ALLOW IN    Anywhere                  
27015                      ALLOW IN    Anywhere                  
27016                      ALLOW IN    Anywhere                  
22/tcp (v6)                LIMIT IN    Anywhere (v6)             
2375/tcp (v6)              ALLOW IN    Anywhere (v6)             
2376/tcp (v6)              ALLOW IN    Anywhere (v6)             
80 (v6)                    ALLOW IN    Anywhere (v6)             
27015 (v6)                 ALLOW IN    Anywhere (v6)             
27016 (v6)                 ALLOW IN    Anywhere (v6)   
Netstat:

Code: Select all

netstat -tupna
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0    363 <server_ip>:37459    185.25.182.20:27025     ESTABLISHED 2724/eurotrucks2_se 
udp        0      0 0.0.0.0:41808           0.0.0.0:*                           2724/eurotrucks2_se 
udp      768      0 0.0.0.0:27016           0.0.0.0:*                           2724/eurotrucks2_se
Not visible server

UFW status (even more ports allowed):

Code: Select all

ufw status verbose
Status: active
Logging: on (medium)
Default: allow (incoming), allow (outgoing), allow (routed)
New profiles: skip

To                         Action      From
--                         ------      ----
22/tcp                     LIMIT IN    Anywhere                  
2375/tcp                   ALLOW IN    Anywhere                  
2376/tcp                   ALLOW IN    Anywhere                  
80                         ALLOW IN    Anywhere                  
27015                      ALLOW IN    Anywhere                  
27016                      ALLOW IN    Anywhere                  
100                        ALLOW IN    Anywhere                  
101                        ALLOW IN    Anywhere                  
27015:27020/udp            ALLOW IN    Anywhere                  
27015:27020/tcp            ALLOW IN    Anywhere                  
100:101/tcp                ALLOW IN    Anywhere                  
100:101/udp                ALLOW IN    Anywhere                  
22/tcp (v6)                LIMIT IN    Anywhere (v6)             
2375/tcp (v6)              ALLOW IN    Anywhere (v6)             
2376/tcp (v6)              ALLOW IN    Anywhere (v6)             
80 (v6)                    ALLOW IN    Anywhere (v6)             
27015 (v6)                 ALLOW IN    Anywhere (v6)             
27016 (v6)                 ALLOW IN    Anywhere (v6)             
100 (v6)                   ALLOW IN    Anywhere (v6)             
101 (v6)                   ALLOW IN    Anywhere (v6)             
27015:27020/udp (v6)       ALLOW IN    Anywhere (v6)             
27015:27020/tcp (v6)       ALLOW IN    Anywhere (v6)             
100:101/tcp (v6)           ALLOW IN    Anywhere (v6)             
100:101/udp (v6)           ALLOW IN    Anywhere (v6)   
Netstat:

Code: Select all

netstat -tupna
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 <server_ip>:54893     185.25.182.52:27031     ESTABLISHED 1035/eurotrucks2_se 
udp        0      0 0.0.0.0:27016           0.0.0.0:*                           1035/eurotrucks2_se 
udp        0      0 0.0.0.0:41430           0.0.0.0:*                           1035/eurotrucks2_se 
UFW logs, incoming traffic is allowed

Code: Select all

Jan 24 18:15:00 server-7e170810-b9b6-43df-a1ab-6958a8c8103a kernel: [ 1859.166328] [UFW AUDIT] IN=eth0 OUT= MAC=42:f3:82:f8:c1:e6:fe:00:00:00:01:01:08:00 SRC=<another_ip> DST=<server_ip> LEN=53 TOS=0x00 PREC=0x00 TTL=108 ID=54742 PROTO=UDP SPT=49600 DPT=27016 LEN=33
Hope someone could help figuring out what's happening :)
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