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Nginx security #195

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merged 2 commits into from
Nov 15, 2023
Merged

Nginx security #195

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8ba8d41
fix: abnormal exit from script if secret not yet created
phantomjinx Nov 10, 2023
6e10af3
HAWNG-265: Adds security hardening config to nginx server
phantomjinx Nov 14, 2023
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24 changes: 24 additions & 0 deletions docker/nginx-gateway-k8s.conf.template
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,11 @@ proxy_cache_path /var/cache/nginx/pods levels=1:2 keys_zone=pods:2m max_size=4m
proxy_cache_path /var/cache/nginx/rbac levels=1:2 keys_zone=rbac:256k max_size=3m inactive=60m use_temp_path=off;
proxy_cache_path /var/cache/nginx/rbac2 levels=1:2 keys_zone=rbac2:256k max_size=3m inactive=60m use_temp_path=off;

# Setup a connection zone to control number of connections
limit_conn_zone $binary_remote_addr zone=limitconnbyaddr:20m;
# Return status code for too many connections
limit_conn_status 429;

map $uri $new {
/ /online/;
/online /online/;
Expand All @@ -24,6 +29,15 @@ server {
gzip on;
root /usr/share/nginx/html/;

# Limit a single IP to 75 connections
limit_conn limitconnbyaddr 75;

# Limit the keepalive of connections (60s default)
keepalive_timeout 60s;

# Do not show server version
server_tokens off;

# Performance tuning
subrequest_output_buffer_size ${NGINX_SUBREQUEST_OUTPUT_BUFFER_SIZE};
client_body_buffer_size ${NGINX_CLIENT_BODY_BUFFER_SIZE};
Expand All @@ -32,6 +46,16 @@ server {
# For debugging location rewrite
#rewrite_log on;

if ($request_method !~ ^(GET|HEAD|POST)$ ) {
return 444;
}

# Prevent click jacking attacks
add_header X-Frame-Options "SAMEORIGIN";

# Only accept newer ssl protocols
ssl_protocols TLSv1.2 TLSv1.3;

if ($new) {
rewrite ^ $new redirect;
}
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25 changes: 25 additions & 0 deletions docker/nginx-gateway.conf.template
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,11 @@ proxy_cache_path /var/cache/nginx/pods levels=1:2 keys_zone=pods:2m max_size=4m
proxy_cache_path /var/cache/nginx/rbac levels=1:2 keys_zone=rbac:256k max_size=3m inactive=60m use_temp_path=off;
proxy_cache_path /var/cache/nginx/rbac2 levels=1:2 keys_zone=rbac2:256k max_size=3m inactive=60m use_temp_path=off;

# Setup a connection zone to control number of connections
limit_conn_zone $binary_remote_addr zone=limitconnbyaddr:20m;
# Return status code for too many connections
limit_conn_status 429;

map $uri $new {
/ /online/;
/online /online/;
Expand All @@ -15,6 +20,7 @@ map $http_upgrade $connection_upgrade {
'' close;
}


server {
listen 8443 ssl;
server_name localhost;
Expand All @@ -24,6 +30,15 @@ server {
gzip on;
root /usr/share/nginx/html/;

# Limit a single IP to 75 connections
limit_conn limitconnbyaddr 75;

# Limit the keepalive of connections (60s default)
keepalive_timeout 60s;

# Do not show server version
server_tokens off;

# Performance tuning
subrequest_output_buffer_size ${NGINX_SUBREQUEST_OUTPUT_BUFFER_SIZE};
client_body_buffer_size ${NGINX_CLIENT_BODY_BUFFER_SIZE};
Expand All @@ -32,6 +47,16 @@ server {
# For debugging location rewrite
#rewrite_log on;

if ($request_method !~ ^(GET|HEAD|POST)$ ) {
return 444;
}

# Prevent click jacking attacks
add_header X-Frame-Options "SAMEORIGIN";

# Only accept newer ssl protocols
ssl_protocols TLSv1.2 TLSv1.3;

if ($new) {
rewrite ^ $new redirect;
}
Expand Down
24 changes: 24 additions & 0 deletions docker/nginx.conf
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Original file line number Diff line number Diff line change
@@ -1,3 +1,8 @@
# Setup a connection zone to control number of connections
limit_conn_zone $binary_remote_addr zone=limitconnbyaddr:20m;
# Return status code for too many connections
limit_conn_status 429;

map $uri $new {
/ /online/;
}
Expand All @@ -16,6 +21,25 @@ server {
gzip on;
root /usr/share/nginx/html/;

# Limit a single IP to 75 connections
limit_conn limitconnbyaddr 75;

# Limit the keepalive of connections (60s default)
keepalive_timeout 60s;

# Do not show server version
server_tokens off;

if ($request_method !~ ^(GET|HEAD|POST)$ ) {
return 444;
}

# Prevent click jacking attacks
add_header X-Frame-Options "SAMEORIGIN";

# Only accept newer ssl protocols
ssl_protocols TLSv1.2 TLSv1.3;

if ($new) {
rewrite ^ $new redirect;
}
Expand Down
5 changes: 2 additions & 3 deletions scripts/generate-proxying.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ TEMP_DIR=$(mktemp --tmpdir -d generate-proxying.XXXXXX)
exithandler() {
exitcode=$?
if [ "$exitcode" != "0" ]; then
echo "WARNING: unsuccessful exit code: $?" >&2
echo "WARNING: unsuccessful exit code: $exitcode" >&2
fi

rm -rf "$TEMP_DIR"
Expand Down Expand Up @@ -112,8 +112,7 @@ openssl req -new -key server.key -out server.csr -config csr.conf
# Issue the signed certificate
openssl x509 -req -in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out server.crt -days 10000 -extensions v3_ext -extfile csr.conf

${KUBECLI} get secret ${SECRET_NAME} -n ${NAMESPACE} > /dev/null
if [ $? == 0 ]; then
if ${KUBECLI} get secret ${SECRET_NAME} -n ${NAMESPACE} 1> /dev/null 2>& 1; then
echo "The secret ${SECRET_NAME} in ${NAMESPACE} already exists"
exit 0
fi
Expand Down