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embedded_packet_size_error followed by TCP_SIZE_ERROR

Posted: Sat Jun 18, 2022 5:35 pm
by calant
Hi there,

I've been using OpenVPN on my home router running Asuswrt-Merlin for a couple of years now whenever I'm out and about and need to use a public WiFi.

Today I checked in to a hotel in a remote location (no mobile connection) and connected to their free WiFi (no password and no sign on page needed, can browse the internet immediately on connecting to the WiFi), but I get the below error when trying to use the OpenVPN app on my iOS devices (tried two iPhones and one iPad). I know my home router is connected, as I can connect to my home Plex server and stream a film just fine.

I used openvpn perfectly fine a week ago when at the hospital and using their WiFi, so I'm thinking this must be something with the hotel's WiFi?

Anything suggestions?

Many thanks.

Code: Select all

2022-06-18 17:55:18 1

2022-06-18 17:55:18 ----- OpenVPN Start -----
OpenVPN core 3.git::58b92569 ios arm64 64-bit

2022-06-18 17:55:18 OpenVPN core 3.git::58b92569 ios arm64 64-bit

2022-06-18 17:55:18 Frame=512/2048/512 mssfix-ctrl=1250

2022-06-18 17:55:18 UNUSED OPTIONS
4 [resolv-retry] [infinite] 
5 [nobind] 
7 [ncp-ciphers] [AES-256-GCM:AES-128-GCM:AES-256-CBC:AES-128-CBC] 

2022-06-18 17:55:18 EVENT: RESOLVE

2022-06-18 17:55:18 Contacting [x.x.x.x]:443/TCP via TCPv4

2022-06-18 17:55:18 EVENT: WAIT

2022-06-18 17:55:18 Connecting to [x.x.x.x]:443 (x.x.x.x) via TCPv4

2022-06-18 17:55:18 EVENT: CONNECTING

2022-06-18 17:55:18 Tunnel Options:V4,dev-type tun,link-mtu 1543,tun-mtu 1500,proto TCPv4_CLIENT,cipher BF-CBC,auth SHA1,keysize 128,key-method 2,tls-client

2022-06-18 17:55:18 Creds: Username/Password

2022-06-18 17:55:18 Peer Info:
IV_VER=3.git::58b92569
IV_PLAT=ios
IV_NCP=2
IV_TCPNL=1
IV_PROTO=2
IV_GUI_VER=net.openvpn.connect.ios_3.2.3-3760
IV_SSO=openurl
IV_BS64DL=1


2022-06-18 17:55:18 TLS-TCP packet extract error: embedded_packet_size_error

2022-06-18 17:55:18 Transport Error: Transport error on 'x.x.x.x: TCP_SIZE_ERROR

2022-06-18 17:55:18 EVENT: TRANSPORT_ERROR Transport error on 'x.x.x.x: TCP_SIZE_ERROR [ERR]

2022-06-18 17:55:18 Client terminated, restarting in 5000 ms...