Connection reset, multiple internet provider

HI all,

I am having the following connection issue.

Wed Oct  9 10:51:56 2019 OpenVPN 2.4.7 x86_64-apple-darwin18.6.0 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [MH/RECVDA] [AEAD] built on Sep  1 2019
Wed Oct  9 10:51:56 2019 library versions: OpenSSL 1.1.1d  10 Sep 2019, LZO 2.10
Wed Oct  9 10:51:56 2019 Outgoing Control Channel Encryption: Cipher 'AES-256-CTR' initialized with 256 bit key
Wed Oct  9 10:51:56 2019 Outgoing Control Channel Encryption: Using 256 bit message hash 'SHA256' for HMAC authentication
Wed Oct  9 10:51:56 2019 Incoming Control Channel Encryption: Cipher 'AES-256-CTR' initialized with 256 bit key
Wed Oct  9 10:51:56 2019 Incoming Control Channel Encryption: Using 256 bit message hash 'SHA256' for HMAC authentication
Wed Oct  9 10:51:56 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]88.198.233.171:443
Wed Oct  9 10:51:56 2019 Socket Buffers: R=[131072->131072] S=[131072->131072]
Wed Oct  9 10:51:56 2019 Attempting to establish TCP connection with [AF_INET]88.198.233.171:443 [nonblock]
Wed Oct  9 10:51:57 2019 TCP connection established with [AF_INET]88.198.233.171:443
Wed Oct  9 10:51:57 2019 TCP_CLIENT link local: (not bound)
Wed Oct  9 10:51:57 2019 TCP_CLIENT link remote: [AF_INET]88.198.233.171:443
Wed Oct  9 10:51:57 2019 TLS: Initial packet from [AF_INET]88.198.233.171:443, sid=e532efe6 ce2bd017
Wed Oct  9 10:51:58 2019 VERIFY OK: depth=1, C=UK, ST=City, L=London, O=HackTheBox, CN=HackTheBox CA, name=htb, [email protected]
Wed Oct  9 10:51:58 2019 VERIFY KU OK
Wed Oct  9 10:51:58 2019 Validating certificate extended key usage
Wed Oct  9 10:51:58 2019 ++ Certificate has EKU (str) TLS Web Server Authentication, expects TLS Web Server Authentication
Wed Oct  9 10:51:58 2019 VERIFY EKU OK
Wed Oct  9 10:51:58 2019 VERIFY OK: depth=0, C=UK, ST=City, L=London, O=HackTheBox, CN=htb, name=htb, [email protected]
Wed Oct  9 10:51:58 2019 Connection reset, restarting [0]
Wed Oct  9 10:51:58 2019 SIGUSR1[soft,connection-reset] received, process restarting
Wed Oct  9 10:51:58 2019 Restart pause, 5 second(s)

The point is I have two internet providers. It is possible to connect from internet provider 1 and when I switch to internet provider 2 I have the above error.

I tried to register with a second account on hackthebox, and with this second account it is possible to connect from internet provider 2 and I have the above error with internet provider 1.

(same problem occurs when I try to connect from other places with internet provider 3 from the university for example)

It seems that the connection pack is binded to the first public IP address used for connecting and cannot be changed, thus being systematically disconnected when trying from another public IP.

What I have already tried :

  • Regenerate connection pack
  • Verify firewaling

Any idea on how to solve this issue ?

/tah

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