Nginx inputstream ssk offloading - ssl

WHen using NginX for ssl offloading things work fine, however when trying to do this for serialized stream over a socket it seems to work incorrectly, and the documentation over using streams http://nginx.org/en/docs/stream/ngx_stream_upstream_module.html makes no sense,
can anyone help me with a working foo bar example of how to ssl offload for a streaming input(made of serialized logging event objects in this case) with nginx
Edit:
we are trying to forward and strip SSL off of log4j socketappender output but cannot even get the forwarding working when the SSL is not enabled.
here is the config file without the ssl offloading portion(when retrieving non https the forwarding still does not work correctly)
events {
worker_connections 1024;
}
http {
server {
listen 4560 ;
server_name logstash.corelims.com;
location / {
proxy_pass_request_headers on;
proxy_pass http://localhost:4561/;
proxy_redirect http://localhost:4561/ http://logstash.corelims.com:4560/;
}
error_log C:/ELK/nginx-1.9.4/logs/debug.log debug;
}
}
which leads us to these debug logs:
2015/08/27 00:54:59 [info] 5052#3716: *45 WSARecv() failed (10054: An existing connection was forcibly closed by the remote host) while reading client request line, client: IP.ADDRESS.HIDDENFOR.POST, server: foo.bar.com, request: "’ "
2015/08/27 00:54:59 [debug] 5052#3716: *45 lingering read: -1
2015/08/27 00:54:59 [debug] 5052#3716: *45 http request count:1 blk:0
2015/08/27 00:54:59 [debug] 5052#3716: *45 http close request
2015/08/27 00:54:59 [debug] 5052#3716: *45 http log handler
2015/08/27 00:54:59 [debug] 5052#3716: *45 free: 008DE8E8, unused: 1991
2015/08/27 00:54:59 [debug] 5052#3716: *45 close http connection: 300
2015/08/27 00:54:59 [debug] 5052#3716: *45 event timer del: 300: 1822859279
2015/08/27 00:54:59 [debug] 5052#3716: *45 select del event fd:300 ev:0
2015/08/27 00:54:59 [debug] 5052#3716: *45 reusable connection: 0
2015/08/27 00:54:59 [debug] 5052#3716: *45 free: 023BCED0
2015/08/27 00:54:59 [debug] 5052#3716: *45 free: 023BEEA8, unused: 24
2015/08/27 12:27:45 [debug] 5052#3716: select del event fd:316 ev:0

Related

nginx stream_ssl_preread module unable to read ssl_preread_server_name

I am trying to set up nginx to map TLS connections to different backends based on the SNI server name. From what I can tell, my client is sending the server name, but the preread module is only reading a hyphen.
Here is my nginx congif:
stream {
map_hash_bucket_size 64;
############################################################
### logging
log_format log_stream '$remote_addr [$time_local] $protocol [$ssl_preread_server_name] [$ssl_preread_alpn_protocols] [$instanceport] '
'$status $bytes_sent $bytes_received $session_time';
error_log /usr/home/glance/Logs/pservernginx.error.log info;
access_log /usr/home/glance/Logs/pservernginx.access.log log_stream;
############################################################
### ssl configuration
ssl_certificate /usr/home/glance/GlanceReleases/star.myglance.org.pem;
ssl_certificate_key /usr/home/glance/GlanceReleases/star.myglance.org.pem;
ssl_protocols TLSv1.1 TLSv1.2;
ssl_ciphers HIGH:!aNULL:!MD5:!RC4;
limit_conn_zone $binary_remote_addr zone=ip_addr:10m;
########################################################################
### Raw TLS PServer Connections
### Listen for TLS on 5501 and forward to TCP sock 6500 (socket port)
### https://nginx.org/en/docs/stream/ngx_stream_ssl_preread_module.html
map $ssl_preread_server_name $instanceport {
presence.myglance.org 6500;
presence-1.myglance.org 6501;
presence-2.myglance.org 6502;
default glance-no-upstream-instance-configured;
}
server {
listen 5501 ssl;
ssl_preread on;
proxy_connect_timeout 20s; # max time to connect to pserver
proxy_timeout 30s; # max time between successive reads or writes
proxy_pass 127.0.0.1:$instanceport;
}
}
wireshark shows the Server Name header:
The nginx access log shows only hyphens for the preread variables:
108.49.96.66 [12/Apr/2019:11:50:58 +0000] TCP [-] [-] [glance-no-upstream-instance-configured] 500 0 0 0.066
I'm running nginx 1.14.2 on FreeBSD. How can I debug what is happening in the preread module?
================ UPDATE ===============
Turned on debug logging. Maybe "ssl preread: not a handshake" is a clue.
2019/04/12 14:49:50 [info] 61420#0: *9 client 108.49.96.66:54740 connected to 0.0.0.0:5501
2019/04/12 14:49:50 [debug] 61420#0: *9 posix_memalign: 0000000801C35000:256 #16
2019/04/12 14:49:50 [debug] 61419#0: accept on 0.0.0.0:5501, ready: 1
2019/04/12 14:49:50 [debug] 61419#0: accept() not ready (35: Resource temporarily unavailable)
2019/04/12 14:49:50 [debug] 61420#0: *9 posix_memalign: 0000000801C35600:256 #16
2019/04/12 14:49:50 [debug] 61420#0: *9 generic phase: 0
2019/04/12 14:49:50 [debug] 61420#0: *9 generic phase: 1
2019/04/12 14:49:50 [debug] 61420#0: *9 generic phase: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 tcp_nodelay
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_do_handshake: -1
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_get_error: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 kevent set event: 5: ft:-1 fl:0025
2019/04/12 14:49:50 [debug] 61420#0: *9 event timer add: 5: 60000:29203481224
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL handshake handler: 0
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_do_handshake: 1
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL: TLSv1.2, cipher: "ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD"
2019/04/12 14:49:50 [debug] 61420#0: *9 event timer del: 5: 29203481224
2019/04/12 14:49:50 [debug] 61420#0: *9 generic phase: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 ssl preread handler
2019/04/12 14:49:50 [debug] 61420#0: *9 malloc: 0000000801CFF000:16384
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_read: -1
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_get_error: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 ssl preread handler
2019/04/12 14:49:50 [debug] 61420#0: *9 posix_memalign: 0000000801C35900:256 #16
2019/04/12 14:49:50 [debug] 61420#0: *9 event timer add: 5: 30000:29203451252
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_read: 81
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_read: -1
2019/04/12 14:49:50 [debug] 61420#0: *9 SSL_get_error: 2
2019/04/12 14:49:50 [debug] 61420#0: *9 ssl preread handler
2019/04/12 14:49:50 [debug] 61420#0: *9 ssl preread: not a handshake
2019/04/12 14:49:50 [debug] 61420#0: *9 event timer del: 5: 29203451252
2019/04/12 14:49:50 [debug] 61420#0: *9 proxy connection handler
2019/04/12 14:49:50 [debug] 61420#0: *9 malloc: 0000000801DF7000:400
2019/04/12 14:49:50 [debug] 61420#0: *9 malloc: 0000000801CD9000:16384
2019/04/12 14:49:50 [debug] 61420#0: *9 stream map started
2019/04/12 14:49:50 [debug] 61420#0: *9 stream map: "" "glance-no-upstream-instance-configured"
================= UPDATE 2 ======================
I tested using
openssl s_client -connect ... -servername ...
instead of my client. Now it appears that the preread module is blocked waiting for data for 30 seconds (error code 2 is WANT_READ):
2019/04/23 13:04:30 [debug] 61419#0: *12844 SSL: TLSv1.2, cipher: "ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD"
2019/04/23 13:04:30 [debug] 61419#0: *12844 event timer del: 3: 30147561850
2019/04/23 13:04:30 [debug] 61419#0: *12844 generic phase: 2
2019/04/23 13:04:30 [debug] 61419#0: *12844 ssl preread handler
2019/04/23 13:04:30 [debug] 61419#0: *12844 malloc: 0000000801CA6140:16384
2019/04/23 13:04:30 [debug] 61419#0: *12844 SSL_read: -1
2019/04/23 13:04:30 [debug] 61419#0: *12844 SSL_get_error: 2
2019/04/23 13:04:30 [debug] 61419#0: *12844 ssl preread handler
2019/04/23 13:04:30 [debug] 61419#0: *12844 posix_memalign: 0000000801DB3400:256 #16
2019/04/23 13:04:30 [debug] 61419#0: *12844 event timer add: 3: 30000:30147531898
2019/04/23 13:05:00 [debug] 61419#0: *12844 event timer del: 3: 30147531898
2019/04/23 13:05:00 [debug] 61419#0: *12844 finalize stream session: 200
2019/04/23 13:05:00 [debug] 61419#0: *12844 stream log handler
2019/04/23 13:05:00 [debug] 61419#0: *12844 stream map started
2019/04/23 13:05:00 [debug] 61419#0: *12844 stream script var: ""
I found the problem:
listen 5501 **ssl**;
ssl_preread on;
ssl in the listen directive caused that nginx server to do the ssl handshake. By the time the preread module was notified, the handshake bytes had already been consumed, which is all consistent with the behavior I was seeing. In my case, I still want nginx to offload the encryption. So I created a set of nginx server directives to terminate the ssl connection before passing to my back end.
This is the relevant portion of my nginx config after fixing it. Note that the last server directive (the one that uses ssl_preread) does not terminate the SSL connection.
########################################################################
### TLS Connections
### Listen for TLS on 5501 and forward to TCP sock 6500 (socket port)
### https://nginx.org/en/docs/stream/ngx_stream_ssl_preread_module.html
map $ssl_preread_server_name $instanceport {
presence.myglance.org 5502;
presence-1.myglance.org 5503;
presence-2.myglance.org 5504;
default glance-no-upstream-instance-configured;
}
server {
listen 5502 ssl;
ssl_preread off;
proxy_pass 127.0.0.1:6502;
}
server {
listen 5503 ssl;
ssl_preread off;
proxy_pass 127.0.0.1:6503;
}
server {
listen 5504 ssl;
ssl_preread off;
proxy_pass 127.0.0.1:6504;
}
server {
listen 5501;
ssl_preread on;
proxy_connect_timeout 20s; # max time to connect to pserver
proxy_timeout 30s; # max time between successive reads or writes
proxy_pass 127.0.0.1:$instanceport;
}
In case you need to use ssl in listen directive, you can simply use $ssl_server_name in the map block instead of $ssl_preread_server_name

Log SSL handshake failure reason as well as Client IP in nginx

I have an nginx.conf configuration file that looks like this:
user vagrant;
worker_processes auto;
error_log /var/log/nginx/error.log debug;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;
events {
worker_connections 1024;
# multi_accept on;
}
http {
##
# Basic Settings
##
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
# server_tokens off;
# server_names_hash_bucket_size 64;
# server_name_in_redirect off;
# defining log format
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$ssl_protocol '
'$status $body_bytes_sent "$host" "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
include /etc/nginx/mime.types;
default_type application/octet-stream;
##
# SSL Settings
##
ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
ssl_prefer_server_ciphers on;
##
# Logging Settings
##
access_log /var/log/nginx/access.log main;
##
# Gzip Settings
##
gzip on;
# gzip_vary on;
# gzip_proxied any;
# gzip_comp_level 6;
# gzip_buffers 16 8k;
# gzip_http_version 1.1;
# gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
##
# Virtual Host Configs
##
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
}
and my individual server configuration that looks like this:
server {
# listen on port 443 (https)
listen 443 ssl;
server_name www.domain.org domain.org;
# location of the self-signed SSL certificate
ssl_certificate /home/vagrant/certs/domain.org.crt;
ssl_certificate_key /home/vagrant/domain.org.key;
#log SSL errors
error_log /var/log/nginx/error_tls_2.log debug;
location / {
# forward application requests to the gunicorn server
proxy_pass http://localhost:8000;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}
I want to be able to log SSL handshake failure errors with a specific requests Client IP as well as the reason for SSL handshake failure. More specifically, I am testing the kind of error received when the server certificate is out of date. However, in the log file where I am logging the error, the log format is of this form:
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL ALPN supported by client: http/1.1
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL ALPN selected: http/1.1
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL_do_handshake: -1
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL_get_error: 2
2019/04/11 22:43:02 [debug] 3086#3086: *27 reusable connection: 0
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL handshake handler: 0
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL_do_handshake: 1
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL: TLSv1.2, cipher: "ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD"
2019/04/11 22:43:02 [debug] 3086#3086: *27 reusable connection: 1
2019/04/11 22:43:02 [debug] 3086#3086: *27 http wait request handler
2019/04/11 22:43:02 [debug] 3086#3086: *27 malloc: 00005640A0AF45C0:1024
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL_read: -1
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL_get_error: 2
2019/04/11 22:43:02 [debug] 3086#3086: *27 free: 00005640A0AF45C0
2019/04/11 22:43:02 [debug] 3086#3086: *27 http wait request handler
2019/04/11 22:43:02 [debug] 3086#3086: *27 malloc: 00005640A0AF45C0:1024
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL_read: 0
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL_get_error: 5
2019/04/11 22:43:02 [debug] 3086#3086: *27 peer shutdown SSL cleanly
2019/04/11 22:43:02 [info] 3086#3086: *27 client closed connection while waiting for request, client: 192.168.33.1, server: 0.0.0.0:443
2019/04/11 22:43:02 [debug] 3086#3086: *27 close http connection: 4
2019/04/11 22:43:02 [debug] 3086#3086: *27 SSL_shutdown: 1
2019/04/11 22:43:02 [debug] 3086#3086: *27 event timer del: 4: 2302465
2019/04/11 22:43:02 [debug] 3086#3086: *27 reusable connection: 0
2019/04/11 22:43:02 [debug] 3086#3086: *27 free: 00005640A0AF45C0
2019/04/11 22:43:02 [debug] 3086#3086: *27 free: 00005640A0A855C0, unused: 24
As can be seen none of these lines allow me to distinguish the Client's IP or the reason for SSL handshake failure. Could anyone help with how can I do this?

Ingress NGINX client closed connection while SSL handshaking

we have ingress-nginx running for a while and about 10% of requests ending up with some SSL handshake problem.
Here is an example of a failing connection:
2019/02/14 10:15:35 [debug] 237#237: *4612 accept: **.**.**.**:40928 fd:53
2019/02/14 10:15:35 [debug] 237#237: *4612 event timer add: 53: 60000:5527050245
2019/02/14 10:15:35 [debug] 237#237: *4612 reusable connection: 1
2019/02/14 10:15:35 [debug] 237#237: *4612 epoll add event: fd:53 op:1 ev:80002001
2019/02/14 10:15:45 [debug] 237#237: *4612 http check ssl handshake
2019/02/14 10:15:45 [debug] 237#237: *4612 http recv(): 0
2019/02/14 10:15:45 [info] 237#237: *4612 client closed connection while SSL handshaking, client: **.**.**.**, server: 0.0.0.0:443
2019/02/14 10:15:45 [debug] 237#237: *4612 close http connection: 53
2019/02/14 10:15:45 [debug] 237#237: *4612 event timer del: 53: 5527050245
2019/02/14 10:15:45 [debug] 237#237: *4612 reusable connection: 0
2019/02/14 10:15:45 [debug] 237#237: *4612 free: 00007F4CC5858E00, unused: 232
10% of failures seems to be quite a lot to expect.
I really would appreciate any help in this!

getting 400 bad request error when nginx reverse proxy is configured with SSL.

I have configured Nginx reverse proxy server to listen on port 443 and pass the requests to an upstream SAAS client. Below is the configuration.
server {
listen 443;
server_name test.saas.someloggingserver.com;
ssl on;
ssl_certificate C:/nginx-1.13.8/nginx-1.13.8/ssl/server_cert.crt;
ssl_certificate_key C:/nginx-1.13.8/nginx-1.13.8/ssl/server.key;
ssl_session_timeout 5m;
ssl_protocols SSLv2 SSLv3 TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
ssl_prefer_server_ciphers on;
expires 0;
add_header Cache-Control private;
access_log logs/encrypted_access.txt;
error_log logs/encrypted_error.txt debug;
location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto https;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_redirect http:// https://;
proxy_pass https://test.saas.someloggingserver.com;
}
}
The SSL certificate here also includes a intermediate certificate for SSL handshaking with the upstream server. Now when I try to access the https://test.saas.someloggingserver.com from IE (having above proxy configured) I get below 400 bad request error. I am no Nginx debugging expert, appreciate if you can take a look at below logs and direct me towards the possible cause of this issue?
2017/12/28 07:04:45 [debug] 14640#9400: post event 02D76250
2017/12/28 07:04:45 [debug] 14640#9400: delete posted event 02D76250
2017/12/28 07:04:45 [debug] 14640#9400: accept on 0.0.0.0:443, ready: 0
2017/12/28 07:04:45 [debug] 14640#9400: malloc: 02D50808:256
2017/12/28 07:04:45 [debug] 14640#9400: *3695 accept: 10.92.67.192:49268 fd:496
2017/12/28 07:04:45 [debug] 14640#9400: *3695 event timer add: 496: 60000:2616257381
2017/12/28 07:04:45 [debug] 14640#9400: *3695 reusable connection: 1
2017/12/28 07:04:45 [debug] 14640#9400: *3695 select add event fd:496 ev:0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 post event 02D76340
2017/12/28 07:04:45 [debug] 14640#9400: *3695 delete posted event 02D76340
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http check ssl handshake
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http recv(): 1
2017/12/28 07:04:45 [debug] 14640#9400: *3695 plain http
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http wait request handler
2017/12/28 07:04:45 [debug] 14640#9400: *3695 malloc: 02D4CF80:1024
2017/12/28 07:04:45 [debug] 14640#9400: *3695 WSARecv: fd:496 rc:0 266 of 1024
2017/12/28 07:04:45 [debug] 14640#9400: *3695 reusable connection: 0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 malloc: 02DAF920:4096
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http process request line
2017/12/28 07:04:45 [info] 14640#9400: *3695 client sent invalid request while reading client request line, client: 10.92.67.192, server: test.saas.someloggingserver.com, request: "CONNECT test.saas.someloggingserver.com:443 HTTP/1.0"
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http finalize request: 400, "?" a:1, c:1
2017/12/28 07:04:45 [debug] 14640#9400: *3695 event timer del: 496: 2616257381
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http special response: 400, "?"
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http set discard body
2017/12/28 07:04:45 [debug] 14640#9400: *3695 HTTP/1.1 400 Bad Request
Server: nginx/1.13.8
Date: Thu, 28 Dec 2017 07:04:45 GMT
Content-Type: text/html
Content-Length: 173
Connection: close
2017/12/28 07:04:45 [debug] 14640#9400: *3695 write new buf t:1 f:0 02DB0018, pos 02DB0018, size: 152 file: 0, size: 0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http write filter: l:0 f:0 s:152
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http output filter "?"
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http copy filter: "?"
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http postpone filter "?" 02DB017C
2017/12/28 07:04:45 [debug] 14640#9400: *3695 write old buf t:1 f:0 02DB0018, pos 02DB0018, size: 152 file: 0, size: 0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 write new buf t:0 f:0 00000000, pos 00F25C68, size: 120 file: 0, size: 0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 write new buf t:0 f:0 00000000, pos 00F25758, size: 53 file: 0, size: 0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http write filter: l:1 f:0 s:325
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http write filter limit 0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 WSASend: fd:496, s:325
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http write filter 00000000
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http copy filter: 0 "?"
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http finalize request: 0, "?" a:1, c:1
2017/12/28 07:04:45 [debug] 14640#9400: *3695 event timer add: 496: 5000:2616202381
2017/12/28 07:04:45 [debug] 14640#9400: *3695 post event 02D76340
2017/12/28 07:04:45 [debug] 14640#9400: *3695 delete posted event 02D76340
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http lingering close handler
2017/12/28 07:04:45 [debug] 14640#9400: *3695 WSARecv: fd:496 rc:0 0 of 4096
2017/12/28 07:04:45 [debug] 14640#9400: *3695 lingering read: 0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http request count:1 blk:0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http close request
2017/12/28 07:04:45 [debug] 14640#9400: *3695 http log handler
2017/12/28 07:04:45 [debug] 14640#9400: *3695 free: 02DAF920, unused: 1771
2017/12/28 07:04:45 [debug] 14640#9400: *3695 close http connection: 496
2017/12/28 07:04:45 [debug] 14640#9400: *3695 event timer del: 496: 2616202381
2017/12/28 07:04:45 [debug] 14640#9400: *3695 select del event fd:496 ev:0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 reusable connection: 0
2017/12/28 07:04:45 [debug] 14640#9400: *3695 free: 02D4CF80
2017/12/28 07:04:45 [debug] 14640#9400: *3695 free: 02D50808, unused: 28
You can use Apache as a Forward Proxy, because nginx can only be used as a reverse proxy or as a http proxy.
https://httpd.apache.org/docs/2.4/mod/mod_proxy.html#forwardreverse
An ordinary forward proxy is an intermediate server that sits between the client and the origin server. In order to get content from the origin server, the client sends a request to the proxy naming the origin server as the target. The proxy then requests the content from the origin server and returns it to the client. The client must be specially configured to use the forward proxy to access other sites.
A typical usage of a forward proxy is to provide Internet access to internal clients that are otherwise restricted by a firewall. The forward proxy can also use caching (as provided by mod_cache) to reduce network usage.
Forward Proxy
ProxyRequests On
ProxyVia On
<Proxy "*">
Require host internal.example.com
</Proxy>
As mentioned in one reply, I also faced the same issue with nginx setup so we have done the setup using Apache and wrote a article for the community about steps, which worked for us. Please check it out - https://medium.com/#gaurav.k.sarawgi/use-apache-to-create-forward-proxy-server-on-ubuntu-3299ef91a7cb

nginx / sails / SSL - receiving 200 OK before file upload complete

When I enable SSL on NGINX, and I upload a file larger than 7MB, the file upload does not complete. This works fine if I remove NGINX and just put the SSL directly onto sails. I get the following from the debug file as if I am receiving a status 200 before the file is complete:
2017/01/24 12:25:16 [debug] 2645#2645: *5 sendfile: 1899007 of 54230479 #4670513
2017/01/24 12:25:16 [debug] 2645#2645: *5 chain writer out: 0000564D9740D5D0
2017/01/24 12:25:16 [debug] 2645#2645: *5 event timer: 14, old: 1485260776372, new: 1485260776465
2017/01/24 12:25:16 [debug] 2645#2645: *5 http upstream request: "/api/v1/project/56cd9e2aeabf5be95d6e9b35/report/?"
2017/01/24 12:25:16 [debug] 2645#2645: *5 http upstream process header
2017/01/24 12:25:16 [debug] 2645#2645: *5 malloc: 0000564D9740F870:4096
2017/01/24 12:25:16 [debug] 2645#2645: *5 recv: eof:0, avail:1
2017/01/24 12:25:16 [debug] 2645#2645: *5 recv: fd:14 413 of 4096
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy status 200 "200 OK"
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Vary: X-HTTP-Method-Override"
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "X-Powered-By: Sails <sailsjs.org>"
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Access-Control-Allow-Origin: "
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Access-Control-Allow-Credentials: "
2017/01/24 12:25:16 [debug] 2645#2645: *5 posix_memalign: 0000564D97410880:4096 #16
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Access-Control-Allow-Methods: "
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Access-Control-Allow-Headers: "
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Access-Control-Expose-Headers: "
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Content-Type: application/json; charset=utf-8"
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Content-Length: 94"
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "ETag: W/"5e-dbzI0uHc1qmLjPTL2hIz3A""
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Date: Tue, 24 Jan 2017 12:25:16 GMT"
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header: "Connection: keep-alive"
2017/01/24 12:25:16 [debug] 2645#2645: *5 http proxy header done
2017/01/24 12:25:16 [debug] 2645#2645: *5 xslt filter header
2017/01/24 12:25:16 [debug] 2645#2645: *5 HTTP/1.1 200 OK^M
Server: nginx/1.11.8^M
Date: Tue, 24 Jan 2017 12:25:16 GMT^M
Content-Type: application/json; charset=utf-8^M
Content-Length: 94^M
Connection: keep-alive^M
Vary: X-HTTP-Method-Override^M
X-Powered-By: Sails <sailsjs.org>^M
Access-Control-Allow-Origin: ^M
Access-Control-Allow-Credentials: ^M
Access-Control-Allow-Methods: ^M
Access-Control-Allow-Headers: ^M
Access-Control-Expose-Headers: ^M
ETag: W/"5e-dbzI0uHc1qmLjPTL2hIz3A"^M
Below is my nginx.conf file:
user www-data;
worker_processes auto;
pid /run/nginx.pid;
events {
worker_connections 768;
}
http {
sendfile on;
send_timeout 60s;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 60s;
client_max_body_size 0;
client_body_buffer_size 32K;
ssl_dhparam /ssl/dhparam.pem;
client_body_in_file_only clean;
client_body_in_single_buffer on;
include /etc/nginx/mime.types;
default_type application/octet-stream;
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
gzip on;
gzip_disable "msie6";
include /etc/nginx/sites-enabled/*;
}
Here is my sites-available\default file:
server {
listen 443 ssl http2;
listen [::]:443 ssl http2;
server_name mysite.co.uk;
client_max_body_size 0;
client_body_buffer_size 32K;
location / {
client_body_temp_path /tmp/;
client_max_body_size 0;
client_body_buffer_size 32K;
keepalive_timeout 60s;
proxy_pass http://127.0.0.1:3000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
ssl_certificate /ssl/mykey.pem;
ssl_certificate_key /ssl/mykey.key;
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:128m;
ssl_session_tickets off;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA$
ssl_prefer_server_ciphers on;
add_header Strict-Transport-Security max-age=15768000;
ssl_stapling on;
ssl_stapling_verify on;
resolver 8.8.8.8;
}
Any ideas?