Im Standard geht bei Verwendung des Layer 4-Modes (TCP-Mode) die IP-Adresse der Quelle (Request) verloren. Die Quell-IP wird quasi durch die lokale IP des HAProxy ersetzt, wodurch Tools wie crowdsec oder fail2ban mehr oder minder unbrauchbar werden. Wir zeigen Ihnen in diesem Beitrag, wie Sie die „send-proxy-v2“ Methode im HAProxy nutzen können, um die Quell-IP auch im Backend für Sicherheitstools und Sicherheitsmaßnahmen weiter nutzen zu können.
Download: https://codeberg.org/criegerde/HAProxy/src/branch/main/Layer4
Auf Basis der HAProxy-Konfiguration #3 erweitern wir zuerst die haproxy.cfg wie folgt:
nano /etc/haproxy/haproxy.cfg[...]
backend Nextcloud
mode tcp
fullconn 5000
balance source
stick-table type binary len 32 size 1m expire 600m
acl clienthello req_ssl_hello_type 1
acl serverhello rep_ssl_hello_type 2
tcp-request inspect-delay 5s
tcp-request content accept if clienthello
tcp-response content accept if serverhello
stick on payload_lv(43,1) if clienthello
stick store-response payload_lv(43,1) if serverhello
option ssl-hello-chk
server Nextcloud 192.168.2.206:443 check maxconn 5000 send-proxy-v2
[...]Die gesamte Konfigurationsdatei (/etc/haproxy/haproxy.cfg) sieht bspw. wie folgt aus:
global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin
stats timeout 30s
user haproxy
group haproxy
daemon
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private
# See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
ssl-default-bind-ciphers 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
ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets
defaults
log global
mode tcp
option tcplog
timeout connect 5000
timeout client 50000
timeout server 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
frontend proxy
bind *:443
mode tcp
option tcplog
maxconn 10000
tcp-request inspect-delay 5s
tcp-request content accept if { req_ssl_hello_type 1 }
acl Nextcloud req_ssl_sni -i nextcloud.domain.de
acl BigBlueButton req_ssl_sni -i bbb.domain.de.de
use_backend Nextcloud if Nextcloud
use_backend BigBlueButton if BigBlueButton
backend Nextcloud
mode tcp
fullconn 5000
balance source
stick-table type binary len 32 size 1m expire 600m
acl clienthello req_ssl_hello_type 1
acl serverhello rep_ssl_hello_type 2
tcp-request inspect-delay 5s
tcp-request content accept if clienthello
tcp-response content accept if serverhello
stick on payload_lv(43,1) if clienthello
stick store-response payload_lv(43,1) if serverhello
option ssl-hello-chk
server Nextcloud 192.168.2.206:443 check maxconn 5000 send-proxy-v2
backend BigBlueButton
mode tcp
fullconn 5000
balance source
stick-table type binary len 32 size 1m expire 600m
acl clienthello req_ssl_hello_type 1
acl serverhello rep_ssl_hello_type 2
tcp-request inspect-delay 5s
tcp-request content accept if clienthello
tcp-response content accept if serverhello
stick on payload_lv(43,1) if clienthello
stick store-response payload_lv(43,1) if serverhello
option ssl-hello-chk
server BigBlueButton 192.168.2.234:443 check maxconn 5000 send-proxy-v2Wechseln Sie auf den oder die Webserver und passen dort die nginx.conf sowie den jeweiligen vHost (bspw. nextcloud.conf) an:
nano /etc/nginx/nginx.confuser www-data;
worker_processes auto;
pid /var/run/nginx.pid;
events {
worker_connections 2048;
multi_accept on;
use epoll;
}
http {
log_format criegerde escape=json
'{'
'"time_local":"$time_local",'
'"remote_addr":"$remote_addr",'
'"remote_user":"$remote_user",'
'"request":"$request",'
'"status": "$status",'
'"body_bytes_sent":"$body_bytes_sent",'
'"request_time":"$request_time",'
'"http_referrer":"$http_referer",'
'"http_user_agent":"$http_user_agent"'
'}';
server_names_hash_bucket_size 64;
access_log /var/log/nginx/access.log criegerde;
error_log /var/log/nginx/error.log warn;
# Bitte "set_real_ip..." mit Ihrer HAProxy-IP ersetzen
set_real_ip_from 192.168.2.205;
# real_ip_header X-Forwarded-For;
real_ip_header proxy_protocol;
real_ip_recursive on;
include /etc/nginx/mime.types;
default_type application/octet-stream;
sendfile on;
send_timeout 3600;
tcp_nopush on;
tcp_nodelay on;
open_file_cache max=500 inactive=10m;
open_file_cache_errors on;
keepalive_timeout 65;
reset_timedout_connection on;
server_tokens off;
resolver 127.0.0.53 valid=30s;
resolver_timeout 5s;
include /etc/nginx/conf.d/*.conf;
}Bearbeiten Sie nun die vHost-Datei(en) wie folgt:
nano /etc/nginx/conf.d/nextcloud.confPassen Sie die rot markierten Werte an:
map $arg_v $asset_immutable {
"" "";
default "immutable";
}
server {
listen 443 ssl http2 proxy_protocol;
listen [::]:443 ssl http2 proxy_protocol;
server_name nextcloud.domain.de;
ssl_certificate /ssl/rsa-certs/fullchain.pem;
ssl_certificate_key /ssl/rsa-certs/privkey.pem;
ssl_certificate /ssl/ecc-certs/fullchain.pem;
ssl_certificate_key /ssl/ecc-certs/privkey.pem;
ssl_trusted_certificate /ssl/ecc-certs/chain.pem;
ssl_dhparam /etc/ssl/certs/dhparam.pem;
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_session_tickets off;
ssl_protocols TLSv1.3 TLSv1.2;
ssl_ciphers 'TLS-CHACHA20-POLY1305-SHA256:TLS-AES-256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384';
ssl_ecdh_curve X448:secp521r1:secp384r1;
ssl_prefer_server_ciphers on;
ssl_stapling on;
ssl_stapling_verify on;
client_max_body_size 10G;
client_body_timeout 3600s;
client_body_buffer_size 512k;
fastcgi_buffers 64 4K;
gzip on;
gzip_vary on;
gzip_comp_level 4;
gzip_min_length 256;
gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/wasm application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;
add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
add_header Permissions-Policy "interest-cohort=()";
add_header Referrer-Policy "no-referrer" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Download-Options "noopen" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-Permitted-Cross-Domain-Policies "none" always;
add_header X-Robots-Tag "none" always;
add_header X-XSS-Protection "1; mode=block" always;
fastcgi_hide_header X-Powered-By;
root /var/www/nextcloud;
index index.php index.html /index.php$request_uri;
location = / {
if ( $http_user_agent ~ ^DavClnt ) {
return 302 /remote.php/webdav/$is_args$args;
}
}
location = /robots.txt {
allow all;
log_not_found off;
access_log off;
}
location ^~ /.well-known {
location = /.well-known/carddav { return 301 /remote.php/dav/; }
location = /.well-known/caldav { return 301 /remote.php/dav/; }
location /.well-known/acme-challenge { try_files $uri $uri/ =404; }
location /.well-known/pki-validation { try_files $uri $uri/ =404; }
return 301 /index.php$request_uri;
}
location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)(?:$|/) { return 404; }
location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console) { return 404; }
location ~ \.php(?:$|/) {
rewrite ^/(?!index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|oc[ms]-provider\/.+|.+\/richdocumentscode\/proxy) /index.php$request_uri;
fastcgi_split_path_info ^(.+?\.php)(/.*)$;
set $path_info $fastcgi_path_info;
try_files $fastcgi_script_name =404;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $path_info;
fastcgi_param HTTPS on;
fastcgi_param modHeadersAvailable true;
fastcgi_param front_controller_active true;
fastcgi_pass php-handler;
fastcgi_intercept_errors on;
fastcgi_request_buffering off;
fastcgi_read_timeout 3600;
fastcgi_send_timeout 3600;
fastcgi_connect_timeout 3600;
fastcgi_max_temp_file_size 0;
}
location ~ \.(?:css|js|svg|gif|png|jpg|ico|wasm|tflite|map)$ {
try_files $uri /index.php$request_uri;
add_header Cache-Control "public, max-age=15778463, $asset_immutable";
expires 6M;
access_log off;
location ~ \.wasm$ {
default_type application/wasm;
}
}
location ~ \.woff2?$ {
try_files $uri /index.php$request_uri;
expires 7d;
access_log off;
}
location /remote {
return 301 /remote.php$request_uri;
}
location / {
try_files $uri $uri/ /index.php$request_uri;
}
}Starten Sie nun den Webserver neu
systemctl restart nginx.serviceund im Anschluss den HAProxy
systemctl restart haproxy.serviceAb sofort werden bspw. im access.log des nginx-Webservers, als auch bspw. in der Nextcloud Logdatei die realen „remote IP-Adressen“ protokolliert.
Über Ihre Unterstützung (diese wird ordnungsgemäß versteuert!) würden sich meine Frau, meine Zwillinge und ich sehr freuen. Vielen Dank!
