diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ca8e55b..ffd4c52 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -125,6 +125,8 @@ plan_satapi:
          -var "charge_token=$CHARGE_TOKEN"
          -var "rpcpass=$RPCPASS"
          -var "k8s_autossh_lb=$GKE_LB"
+         -var "station1=$STATION_1"
+         -var "station2=$STATION_2"
          -input=false)
 
 # This plan gets triggered only for miscellaneous branches/tags (i.e. tor, prometheus, etc), so make sure the branch/tag name starts with misc_
@@ -213,6 +215,8 @@ plan_staging:
          -var "charge_token=$CHARGE_TOKEN"
          -var "rpcpass=$RPCPASS"
          -var "k8s_autossh_lb=$GKE_LB"
+         -var "station1=$STATION_1"
+         -var "station2=$STATION_2"
          -input=false)
 
 # Tag with staging_v.* to deploy mainnet + LB to staging (e.g. staging_v0.1.1)
@@ -246,6 +250,8 @@ deploy_staging:
          -var "charge_token=$CHARGE_TOKEN"
          -var "rpcpass=$RPCPASS"
          -var "k8s_autossh_lb=$GKE_LB"
+         -var "station1=$STATION_1"
+         -var "station2=$STATION_2"
          -input=false -auto-approve)
 
 # Tag with prod_v.* to plan mainnet + LB to production (e.g. prod_v0.1.1)
@@ -278,6 +284,8 @@ plan_production:
          -var "charge_token=$CHARGE_TOKEN"
          -var "rpcpass=$RPCPASS"
          -var "k8s_autossh_lb=$GKE_LB"
+         -var "station1=$STATION_1"
+         -var "station2=$STATION_2"
          -input=false)
 
 # Tag with prod_v.* to deploy mainnet + LB to production (e.g. prod_v0.1.1)
@@ -311,6 +319,8 @@ deploy_production:
          -var "charge_token=$CHARGE_TOKEN"
          -var "rpcpass=$RPCPASS"
          -var "k8s_autossh_lb=$GKE_LB"
+         -var "station1=$STATION_1"
+         -var "station2=$STATION_2"
          -input=false -auto-approve)
 
 # Tag with testnet_staging_v.* to plan testnet staging (e.g. testnet_staging_v0.1.1)
diff --git a/terraform/data.tf b/terraform/data.tf
index 55a0b9f..44dbe93 100644
--- a/terraform/data.tf
+++ b/terraform/data.tf
@@ -20,10 +20,31 @@ data "terraform_remote_state" "blc-testnet" {
 
 data "terraform_remote_state" "gossip-prod" {
   backend   = "gcs"
-  workspace = "prod"
+  workspace = "gossip"
 
   config = {
     bucket = "terraform-bs-source"
-    prefix = "satellite-api-gossip"
+    prefix = "satellite-api-reduced-server"
   }
 }
+
+data "terraform_remote_state" "auth-prod" {
+  backend   = "gcs"
+  workspace = "auth"
+
+  config = {
+    bucket = "terraform-bs-source"
+    prefix = "satellite-api-reduced-server"
+  }
+}
+
+data "terraform_remote_state" "btc-src-prod" {
+  backend   = "gcs"
+  workspace = "btc_src"
+
+  config = {
+    bucket = "terraform-bs-source"
+    prefix = "satellite-api-reduced-server"
+  }
+}
+
diff --git a/terraform/main.tf b/terraform/main.tf
index 72d003a..4da32c5 100644
--- a/terraform/main.tf
+++ b/terraform/main.tf
@@ -109,6 +109,8 @@ module "lb" {
   internal_ip_mainnet  = module.blc-mainnet.internal_ip
   internal_ip_testnet  = data.terraform_remote_state.blc-testnet.outputs.blc_internal_ip_testnet
   internal_ip_gossip   = data.terraform_remote_state.gossip-prod.outputs.gossip_internal_ip
+  internal_ip_auth     = data.terraform_remote_state.auth-prod.outputs.auth_internal_ip
+  internal_ip_btc_src  = data.terraform_remote_state.btc-src-prod.outputs.btc_src_internal_ip
   target_pool          = length(google_compute_target_pool.lb-pool) > 0 ? google_compute_target_pool.lb-pool[0].self_link : ""
   health_check         = length(google_compute_http_health_check.lb-health) > 0 ? google_compute_http_health_check.lb-health[0].self_link : ""
 
@@ -123,6 +125,8 @@ module "lb" {
   prom_service_acct = var.prom_service_acct
   letsencrypt_email = var.letsencrypt_email
   public_bucket_url = var.public_bucket_url
+  station1          = var.station1
+  station2          = var.station2
 }
 
 module "tor" {
diff --git a/terraform/modules/lb/cloud-init/lb.yaml b/terraform/modules/lb/cloud-init/lb.yaml
index bd6b56c..f07b2fd 100644
--- a/terraform/modules/lb/cloud-init/lb.yaml
+++ b/terraform/modules/lb/cloud-init/lb.yaml
@@ -73,8 +73,8 @@ write_files:
             # Client cert authenticated endpoints
             location /order/tx/ {
                 # Allow base stations only
-                allow 202.161.136.2;
-                allow 66.203.141.162;
+                allow ${station1};
+                allow ${station2};
                 deny all;
 
                 if ($ssl_client_verify != SUCCESS) {
@@ -85,8 +85,8 @@ write_files:
 
             location /order/rx/ {
                 # Allow base stations only
-                allow 202.161.136.2;
-                allow 66.203.141.162;
+                allow ${station1};
+                allow ${station2};
                 deny all;
 
                 if ($ssl_client_verify != SUCCESS) {
@@ -177,7 +177,7 @@ write_files:
                 proxy_pass http://${gossip_ip}:9292/;
             }
 
-            # Proxy to SSE container
+            # Proxy to gossip SSE container
             location /gossip/subscribe/ {
                 chunked_transfer_encoding off;
                 proxy_buffering off;
@@ -188,14 +188,15 @@ write_files:
                 proxy_pass http://${gossip_ip}:4500/stream?channels=;
             }
 
-            # Client cert authenticated gossip endpoints
+            # Only the ground station hosts are authorized to send and modify
+            # API transmission orders on the gossip server
             location ~ ^/gossip/order($|/.*)$ {
                 # Allow up to 2MB uploads
                 client_max_body_size 2M;
-                
+
                 # Allow base stations only
-                allow 202.161.136.2;
-                allow 66.203.141.162;
+                allow ${station1};
+                allow ${station2};
                 deny all;
 
                 if ($ssl_client_verify != SUCCESS) {
@@ -203,6 +204,102 @@ write_files:
                 }
                 proxy_pass http://${gossip_ip}:9292/order$1;
             }
+
+            # Proxy to the authentication server
+            location /auth/ {
+                add_header 'Access-Control-Allow-Origin' '*' always;
+                add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE' always;
+                add_header 'Access-Control-Allow-Headers' 'X-Auth-Token,DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always;
+                add_header 'X-XSS-Protection' '1; mode=block' always;
+
+                if ($request_uri ~* "^/auth/?$")
+                {
+                  return 301 https://$host;
+                }
+
+                if ($request_method = 'OPTIONS')
+                {
+                  return 200;
+                }
+
+                # Restrict all auth server endpoints to the ground station hosts
+                # authenticated via client-side SSL cert
+                allow ${station1};
+                allow ${station2};
+                deny all;
+
+                if ($ssl_client_verify != SUCCESS) {
+                  return 403;
+                }
+
+                proxy_pass http://${auth_ip}:9292/;
+            }
+
+            # Proxy to auth server's SSE container
+            location /auth/subscribe/ {
+                chunked_transfer_encoding off;
+                proxy_buffering off;
+                proxy_request_buffering off;
+                proxy_cache off;
+                proxy_http_version 1.1;
+
+                allow ${station1};
+                allow ${station2};
+                deny all;
+
+                if ($ssl_client_verify != SUCCESS) {
+                  return 403;
+                }
+
+                proxy_pass http://${auth_ip}:4500/stream?channels=;
+            }
+
+            # Proxy to the Bitcoin source code transmission server
+            location /btc-src/ {
+                add_header 'Access-Control-Allow-Origin' '*' always;
+                add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE' always;
+                add_header 'Access-Control-Allow-Headers' 'X-Auth-Token,DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always;
+                add_header 'X-XSS-Protection' '1; mode=block' always;
+
+                if ($request_uri ~* "^/btc-src/?$")
+                {
+                  return 301 https://$host;
+                }
+
+                if ($request_method = 'OPTIONS')
+                {
+                  return 200;
+                }
+
+                proxy_pass http://${btc_src_ip}:9292/;
+            }
+
+            # Proxy to btc-src's SSE container
+            location /btc-src/subscribe/ {
+                chunked_transfer_encoding off;
+                proxy_buffering off;
+                proxy_request_buffering off;
+                proxy_cache off;
+                proxy_http_version 1.1;
+
+                proxy_pass http://${btc_src_ip}:4500/stream?channels=;
+            }
+
+            # Only the ground station hosts are authorized to send and modify
+            # API transmission orders on the btc-src server
+            location ~ ^/btc-src/order($|/.*)$ {
+                # Allow up to 2MB uploads
+                client_max_body_size 2M;
+
+                allow ${station1};
+                allow ${station2};
+                deny all;
+
+                if ($ssl_client_verify != SUCCESS) {
+                  return 403;
+                }
+                proxy_pass http://${btc_src_ip}:9292/order$1;
+            }
         }
 
   - path: /home/bs/index.html
diff --git a/terraform/modules/lb/data.tf b/terraform/modules/lb/data.tf
index ac96295..d803d41 100644
--- a/terraform/modules/lb/data.tf
+++ b/terraform/modules/lb/data.tf
@@ -11,6 +11,8 @@ data "template_file" "satapi-lb" {
     mainnet_ip           = var.internal_ip_mainnet
     testnet_ip           = var.internal_ip_testnet
     gossip_ip            = var.internal_ip_gossip
+    auth_ip              = var.internal_ip_auth
+    btc_src_ip           = var.internal_ip_btc_src
     certbot_docker       = var.certbot_docker
     node_exporter_docker = var.node_exporter_docker
     host                 = var.host
@@ -18,6 +20,8 @@ data "template_file" "satapi-lb" {
     public_bucket        = replace(google_storage_bucket.satapi-lb-public[count.index].url, "gs://", "")
     private_bucket       = replace(google_storage_bucket.satapi-lb-private[count.index].url, "gs://", "")
     letsencrypt_email    = var.letsencrypt_email
+    station1             = var.station1
+    station2             = var.station2
   }
 }
 
diff --git a/terraform/modules/lb/variables.tf b/terraform/modules/lb/variables.tf
index 5f22ab2..0ba16ff 100644
--- a/terraform/modules/lb/variables.tf
+++ b/terraform/modules/lb/variables.tf
@@ -59,6 +59,14 @@ variable "internal_ip_gossip" {
   type    = string
 }
 
+variable "internal_ip_auth" {
+  type    = string
+}
+
+variable "internal_ip_btc_src" {
+  type    = string
+}
+
 variable "health_check" {
   type = string
 }
@@ -71,6 +79,14 @@ variable "target_pool" {
   type = string
 }
 
+variable "station1" {
+  type = string
+}
+
+variable "station2" {
+  type = string
+}
+
 variable "node_exporter_docker" {
   type = string
 }
diff --git a/terraform/variables.tf b/terraform/variables.tf
index 80ab5a1..59357f2 100644
--- a/terraform/variables.tf
+++ b/terraform/variables.tf
@@ -143,6 +143,16 @@ variable "internal_ip_gossip" {
   default = ""
 }
 
+variable "internal_ip_auth" {
+  type    = string
+  default = ""
+}
+
+variable "internal_ip_btc_src" {
+  type    = string
+  default = ""
+}
+
 variable "health_check" {
   type    = string
   default = ""
@@ -194,6 +204,16 @@ variable "letsencrypt_email" {
   default = ""
 }
 
+variable "station1" {
+  type = string
+  default = ""
+}
+
+variable "station2" {
+  type = string
+  default = ""
+}
+
 variable "ionosphere_docker" {
   type    = string
   default = ""