I am trying to establish SSL connection between the .NET WebSocket Client and my server by calling “wss://domain.xyz”. Haproxy is handling the SSL handshake and once that is done it connect to a NodeJs server running on the same server.
Currently, I am facing an issue where after TCP handshake is made, client sends ACK and FIN, ACK packets instead of “Client Hello” to server. And getting below error in haproxy log.
secured/1: Connection closed during SSL handshake
Normally, that would indicate that this is a client code issue. The confusing part is that the client is able to do ssl handshake when calling “wss://echo.websocket.org”.
But also the Haproxy configuration looks like its working fine since I am able to do ssl handshake using browser (Chrome, IE11, Edge, Firefox) and “WebSocket Test Client” chrome add-on. Ssllabs confirms that part as well. Client is also able to open non-secure websocket connection.
Haproxy -vv
HA-Proxy version 2.0.18-1ppa1~bionic 2020/09/30 - https://haproxy.org/
Build options :
TARGET = linux-glibc
CPU = generic
CC = gcc
CFLAGS = -O2 -g -O2 -fdebug-prefix-map=/build/haproxy-VtLTwE/haproxy-2.0.18=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv -Wno-unused-label -Wno-sign-compare -Wno-unused-parameter -Wno-old-style-declaration -Wno-ignored-qualifiers -Wno-clobbered -Wno-missing-field-initializers -Wno-implicit-fallthrough -Wno-stringop-overflow -Wtype-limits -Wshift-negative-value -Wshift-overflow=2 -Wduplicated-cond -Wnull-dereference
OPTIONS = USE_PCRE2=1 USE_PCRE2_JIT=1 USE_REGPARM=1 USE_OPENSSL=1 USE_LUA=1 USE_ZLIB=1 USE_SYSTEMD=1
Feature list : +EPOLL -KQUEUE -MY_EPOLL -MY_SPLICE +NETFILTER -PCRE -PCRE_JIT +PCRE2 +PCRE2_JIT +POLL -PRIVATE_CACHE +THREAD -PTHREAD_PSHARED +REGPARM -STATIC_PCRE -STATIC_PCRE2 +TPROXY +LINUX_TPROXY +LINUX_SPLICE +LIBCRYPT +CRYPT_H -VSYSCALL +GETADDRINFO +OPENSSL +LUA +FUTEX +ACCEPT4 -MY_ACCEPT4 +ZLIB -SLZ +CPU_AFFINITY +TFO +NS +DL +RT -DEVICEATLAS -51DEGREES -WURFL +SYSTEMD -OBSOLETE_LINKER +PRCTL +THREAD_DUMP -EVPORTS
Default settings :
bufsize = 16384, maxrewrite = 1024, maxpollevents = 200
Built with multi-threading support (MAX_THREADS=64, default=1).
Built with OpenSSL version : OpenSSL 1.1.1 11 Sep 2018
Running on OpenSSL version : OpenSSL 1.1.1 11 Sep 2018
OpenSSL library supports TLS extensions : yes
OpenSSL library supports SNI : yes
OpenSSL library supports : TLSv1.0 TLSv1.1 TLSv1.2 TLSv1.3
Built with Lua version : Lua 5.3.3
Built with network namespace support.
Built with transparent proxy support using: IP_TRANSPARENT IPV6_TRANSPARENT IP_FREEBIND
Built with zlib version : 1.2.11
Running on zlib version : 1.2.11
Compression algorithms supported : identity("identity"), deflate("deflate"), raw-deflate("deflate"), gzip("gzip")
Built with PCRE2 version : 10.31 2018-02-12
PCRE2 library supports JIT : yes
Encrypted password support via crypt(3): yes
Built with the Prometheus exporter as a service
Available polling systems :
epoll : pref=300, test result OK
poll : pref=200, test result OK
select : pref=150, test result OK
Total: 3 (3 usable), will use epoll.
Available multiplexer protocols :
(protocols marked as <default> cannot be specified using 'proto' keyword)
h2 : mode=HTX side=FE|BE mux=H2
h2 : mode=HTTP side=FE mux=H2
<default> : mode=HTX side=FE|BE mux=H1
<default> : mode=TCP|HTTP side=FE|BE mux=PASS
Available services :
prometheus-exporter
Available filters :
[SPOE] spoe
[COMP] compression
[CACHE] cache
[TRACE] trace
Below is my HaProxy configuration. I am suspecting I am doing something wrong in it.
Haproxy configuration
global
log /dev/log local0
maxconn 4096
user haproxy
group haproxy
daemon
ca-base /etc/haproxy/certs
crt-base /etc/haproxy/certs
tune.ssl.default-dh-param 2048
tune.ssl.cachesize 100000
tune.ssl.lifetime 6000
#ssl-default-bind-options no-sslv3
ssl-default-server-options force-tlsv12
ssl-default-bind-options force-tlsv12 no-tls-tickets
ssl-default-bind-ciphers ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:ECDHE-ECDSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:HIGH:SEED:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:!aDH:!aECDH:!EDH-DSS-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA:!SRP:TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256:TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384:TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384:TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384:TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384:TLS_DHE_RSA_WITH_AES_128_GCM_SHA256:TLS_DHE_RSA_WITH_AES_256_GCM_SHA384:TLS_DHE_RSA_WITH_AES_128_CBC_SHA:TLS_DHE_RSA_WITH_AES_256_CBC_SHA:TLS_DHE_RSA_WITH_AES_128_CBC_SHA256:TLS_DHE_RSA_WITH_AES_256_CBC_SHA256:TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256:TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305:TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256:TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305:TLS_DHE_RSA_WITH_AES_128_CBC_SHA:TLS_RSA_WITH_AES_128_CBC_SHA:TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA:TLS_RSA_WITH_CAMELLIA_128_CBC_SHA:TLS_ECDHE_RSA_WITH_AES_128_CBC_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:TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:TLS_RSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:TLS_RSA_WITH_AES_128_CBC_SHA:TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA:TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA:TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA:TLS_EMPTY_RENEGOTIATION_INFO_SCSV:ECDHE-RSA-AES128-SHA256:TLS_RSA_WITH_RC4_128_SHA:TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:TLS_RSA_WITH_AES_128_GCM_SHA256:ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:RSA+AESGCM:RSA+AES:!aNULL:!MD5:!DSS:DES-CBC3-SHA:RSA+3DES
ssl-default-server-ciphers ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:ECDHE-ECDSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:HIGH:SEED:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:!aDH:!aECDH:!EDH-DSS-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA:!SRP:TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256:TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384:TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384:TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384:TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384:TLS_DHE_RSA_WITH_AES_128_GCM_SHA256:TLS_DHE_RSA_WITH_AES_256_GCM_SHA384:TLS_DHE_RSA_WITH_AES_128_CBC_SHA:TLS_DHE_RSA_WITH_AES_256_CBC_SHA:TLS_DHE_RSA_WITH_AES_128_CBC_SHA256:TLS_DHE_RSA_WITH_AES_256_CBC_SHA256:TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256:TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305:TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256:TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305:TLS_DHE_RSA_WITH_AES_128_CBC_SHA:TLS_RSA_WITH_AES_128_CBC_SHA:TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA:TLS_RSA_WITH_CAMELLIA_128_CBC_SHA:TLS_ECDHE_RSA_WITH_AES_128_CBC_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:TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:TLS_RSA_WITH_AES_128_CBC_SHA256:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:TLS_RSA_WITH_AES_128_CBC_SHA:TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA:TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA:TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA:TLS_EMPTY_RENEGOTIATION_INFO_SCSV:ECDHE-RSA-AES128-SHA256:TLS_RSA_WITH_RC4_128_SHA:TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:TLS_RSA_WITH_AES_128_GCM_SHA256:ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:RSA+AESGCM:RSA+AES:!aNULL:!MD5:!DSS:DES-CBC3-SHA:RSA+3DES
defaults
mode http
log global
maxconn 4096
option forwardfor
option http-server-close
retries 3
timeout connect 30s
timeout client 30s
timeout server 30s
# Long timeout for WebSocket connections.
timeout tunnel 1h
timeout http-keep-alive 10s
timeout check 10s
frontend secured
bind :443 ssl crt /etc/haproxy/certs/domain.com.pem alpn http/1.1 ca-file /etc/haproxy/certs/domain.com.ca
#reqadd X-Forwarded-Proto:\ https
http-request set-header X-Forwarded-Proto https
http-response set-header Content-Security-Policy "frame-ancestors domain.com"
http-request add-header X-Custom-SSL-Cipher %sslc
http-request add-header X-Custom-SSL-Version %sslv
acl is_websocket hdr(Upgrade) -i WebSocket
use_backend node if is_websocket
mode http
default_backend node
#frontend unsecured
mode http
bind *:80
acl http ssl_fc,not
http-request redirect scheme https if http
http-request set-header X-Forwarded-Proto https
http-response set-header Content-Security-Policy "frame-ancestors domain.com"
bind *:443 ssl crt hostname.com.pem alpn http/1.1
acl is_websocket hdr_end(host) -i WebSocket
use_backend node if is_websocket
default_backend node
backend node
mode http
balance roundrobin
timeout check 50000ms
http-request set-header Host domain.com
server node1 127.0.0.1:8080 check inter 500ms
Wireshark pcap
34 2.285439 192.168.10.19 178.XX.XX.XXX TCP 66 55514 → 443 [SYN] Seq=0 Win=64240 Len=0 MSS=1460 WS=256 SACK_PERM=1
37 2.373956 178.XX.XX.XXX 192.168.10.19 TCP 66 443 → 55514 [SYN, ACK] Seq=0 Ack=1 Win=64240 Len=0 MSS=1452 SACK_PERM=1 WS=128
38 2.374042 192.168.10.19 178.XX.XX.XXX TCP 54 55514 → 443 [ACK] Seq=1 Ack=1 Win=132096 Len=0
39 2.406464 192.168.10.19 178.XX.XX.XXX TCP 54 55514 → 443 [FIN, ACK] Seq=1 Ack=1 Win=132096 Len=0
45 2.495315 178.XX.XX.XXX 192.168.10.19 TCP 60 443 → 55514 [FIN, ACK] Seq=1 Ack=2 Win=64256 Len=0
46 2.495364 192.168.10.19 178.XX.XX.XXX TCP 54 55514 → 443 [ACK] Seq=2 Ack=2 Win=132096 Len=0
openssl s_client -connect domain.zyx:443
root@ubuntu-s-1vcpu-1gb-ams3-01:/etc/haproxy# openssl s_client -connect domain.xyz:443
CONNECTED(00000005)
depth=2 C = US, ST = New Jersey, L = Jersey City, O = The USERTRUST Network, CN = USERTrust RSA Certification Authority
verify return:1
depth=1 C = GB, ST = Greater Manchester, L = Salford, O = Sectigo Limited, CN = Sectigo RSA Domain Validation Secure Server CA
verify return:1
depth=0 CN = domain.xyz
verify return:1
---
Certificate chain
0 s:CN = domain.xyz
i:C = GB, ST = Greater Manchester, L = Salford, O = Sectigo Limited, CN = Sectigo RSA Domain Validation Secure Server CA
1 s:C = GB, ST = Greater Manchester, L = Salford, O = Sectigo Limited, CN = Sectigo RSA Domain Validation Secure Server CA
i:C = US, ST = New Jersey, L = Jersey City, O = The USERTRUST Network, CN = USERTrust RSA Certification Authority
2 s:C = US, ST = New Jersey, L = Jersey City, O = The USERTRUST Network, CN = USERTrust RSA Certification Authority
i:C = GB, ST = Greater Manchester, L = Salford, O = Comodo CA Limited, CN = AAA Certificate Services
---
Server certificate
-----BEGIN CERTIFICATE-----
(Certificate)
-----END CERTIFICATE-----
subject=CN = domain.xyz
issuer=C = GB, ST = Greater Manchester, L = Salford, O = Sectigo Limited, CN = Sectigo RSA Domain Validation Secure Server CA
---
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: RSA-PSS
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 4951 bytes and written 409 bytes
Verification: OK
---
New, TLSv1.2, Cipher is ECDHE-RSA-CHACHA20-POLY1305
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : ECDHE-RSA-CHACHA20-POLY1305
Session-ID: ***************************************************************E
Session-ID-ctx:
Master-Key: *************************************************************************************2
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1601745936
Timeout : 7200 (sec)
Verify return code: 0 (ok)
Extended master secret: yes
---
HTTP/1.1 408 Request Time-out
content-length: 110
cache-control: no-cache
content-type: text/html
connection: close
<html><body><h1>408 Request Time-out</h1>
Your browser didn't send a complete request in time.
</body></html>
closed
I tried using all tls versions, verified cipher suites even though it didn’t get to that point. In addition, I checked all client debugs but there were no errors. I wonder if calling wss:// uri from .net application needs to be handled differently in haproxy or If I need to configure anything on Domain website provider or hosting provider website. Machine is running Ubuntu 18.04 and client is running on .NET 2.0 (also tried with .NET3.5 & .NET 4.x). I am confused to which end is having the issue here since both work fine but not working together.
Would really appreciate it if you could help me debug this. If I missed any information please let me know. Thank you in advance.