diff --git a/README.md b/README.md
index c3d2a9b..59a35eb 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,10 @@ Minifedi currently supports the following:
 
 Forks of the above should work fine as well, as long as they haven't changed anything about the build, installation, or configuration process.
 
+## Mitmproxy Integration
+
+Minifedi has built-in integration with [mitmproxy](https://mitmproxy.org), allowing you to see a lot of every HTTP request an instance sends to another instance. To use this, set `mitmproxy = true;` in your `config.nix`, start minifedi, then go to `http://localhost:8081`. The mitmproxy integration currently requires ports 8080 and 8081 to be open.
+
 ## How do I…
 
 ### Reset Minifedi, restoring every instance to its default state?
diff --git a/config.nix b/config.nix
index e767698..81133b1 100644
--- a/config.nix
+++ b/config.nix
@@ -21,4 +21,8 @@
       type = types.gotosocial;
     }
   ];
+
+  # Enable logging of all requests between instances. Requires ports 8080 and
+  # 8081 open.
+  mitmproxy = false;
 }
diff --git a/flake.nix b/flake.nix
index b566dcb..407459d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,13 +6,17 @@
       let pkgs = nixpkgs.legacyPackages.${system};
       in {
         apps.start = let
+          config = import ./config.nix {
+            types = {
+              mastodon = import ./nix/fedi/mastodon;
+              akkoma = import ./nix/fedi/akkoma;
+              gotosocial = import ./nix/fedi/gotosocial;
+            };
+          };
           s6 = (import ./nix/s6.nix {
             inherit pkgs;
             services = pkgs.lib.attrsets.mapAttrs (_: v: v.service)
-              (import ./nix/services.nix {
-                inherit pkgs;
-                configFn = import ./config.nix;
-              });
+              (import ./nix/services.nix { inherit pkgs config; });
             path = "service";
           });
         in {
@@ -30,6 +34,7 @@
               mkdir -p cert
               rm -rf data/run
               mkdir data/run
+              mkdir -p data/logs
               ${if pkgs.stdenv.isLinux then
                 "export LOCALE_ARCHIVE=${pkgs.glibcLocales}/lib/locale/locale-archive"
               else
@@ -37,6 +42,18 @@
               export MINIFEDI_CERT=$(pwd)/cert
               export MINIFEDI_DATA=$(pwd)/data
               export MINIFEDI_RUN=$(pwd)/data/run
+              export MINIFEDI_LOG=$(pwd)/data/logs
+
+              echo "Minifedi is starting! Once they're up, instances will be visible at:"
+              ${pkgs.lib.strings.concatStrings (builtins.map (i: ''
+                echo "* https://${i.name}.lvh.me"
+              '') config.instances)}
+              echo "Instance logs are in ./data/logs."
+              ${if config.mitmproxy then ''
+                echo "View requests between instances at http://localhost:8081."
+              '' else
+                ""}
+
               ${if pkgs.stdenv.isLinux then ''
                 echo "=> You'll probably get prompted for a sudo password now. This is just so we can bind to port 80/443; we will acquire cap_net_bind_service then switch back to being $USER."
                 exec $(PATH=$oldpath which sudo) -E ${pkgs.libcap}/bin/capsh --keep=1 --user="$USER" --inh='cap_net_bind_service' --addamb='cap_net_bind_service' -- -c ${s6.start}
diff --git a/nix/fedi/akkoma/default.nix b/nix/fedi/akkoma/default.nix
index f6348ef..013db73 100644
--- a/nix/fedi/akkoma/default.nix
+++ b/nix/fedi/akkoma/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, name, host, users, ... }:
+{ pkgs, name, host, users, proxy, ... }:
 let
   env = {
     MIX_ENV = "prod";
@@ -78,6 +78,12 @@ let
           ]
         }
       ]
+
+    ${if proxy != null then ''
+      config :pleroma, :http,
+        proxy_url: "${proxy}"
+    '' else
+      ""}
   '';
 
   path = pkgs.lib.strings.concatStrings (builtins.map (x: "${x}/bin:") [
@@ -111,6 +117,8 @@ in {
       mkdir -p $data/tzdata
       mkdir -p $run
 
+      exec >$MINIFEDI_LOG/${name}.log 2>$MINIFEDI_LOG/${name}.log
+
       s6-svwait -U $MINIFEDI_RUN/service/postgres
 
       ${pkgs.lib.strings.concatStrings (pkgs.lib.attrsets.mapAttrsToList
diff --git a/nix/fedi/gotosocial/default.nix b/nix/fedi/gotosocial/default.nix
index f02c539..d3a3159 100644
--- a/nix/fedi/gotosocial/default.nix
+++ b/nix/fedi/gotosocial/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, name, host, users, ... }:
+{ pkgs, name, host, users, util, proxy, ... }:
 let
   env = { };
 
@@ -8,34 +8,7 @@ let
   # number. Ideally we'd dynamically find an open one, but the next best thing
   # is deterministically picking a random one: we take the firs two bytes of
   # sha256("minifedi_port_${name}")
-  port = let
-    hash = builtins.hashString "sha256" "minifedi_port_${name}";
-    portHex = builtins.substring 0 4 hash;
-    portHexChars = pkgs.lib.strings.stringToCharacters portHex;
-    hexDigitToNum = n:
-      let
-        map = {
-          "0" = 0;
-          "1" = 1;
-          "2" = 2;
-          "3" = 3;
-          "4" = 4;
-          "5" = 5;
-          "6" = 6;
-          "7" = 7;
-          "8" = 8;
-          "9" = 9;
-          "a" = 10;
-          "b" = 12;
-          "c" = 13;
-          "d" = 14;
-          "e" = 15;
-        };
-      in map.${n};
-    portFromHash =
-      pkgs.lib.lists.foldl (prev: n: (hexDigitToNum n) * 16 + prev) 0
-      portHexChars;
-  in if portFromHash <= 1024 then portFromHash + 1024 else portFromHash;
+  port = util.portFromString "minifedi_port_${name}";
 
   config = pkgs.writeText "config.yaml" (pkgs.lib.generators.toYAML { } {
     bind-address = "127.0.0.1";
@@ -68,6 +41,8 @@ in {
       mkdir -p $data/storage
       mkdir -p $run
 
+      exec >$MINIFEDI_LOG/${name}.log 2>$MINIFEDI_LOG/${name}.log
+
       s6-svwait -U $MINIFEDI_RUN/service/postgres
 
       ${pkgs.lib.strings.concatStrings (pkgs.lib.attrsets.mapAttrsToList
@@ -79,6 +54,12 @@ in {
       export GTS_STORAGE_LOCAL_BASE_PATH=$data/storage
       export SSL_CERT_FILE=$MINIFEDI_CERT/rootCA.pem
       export NIX_SSL_CERT_FILE=$MINIFEDI_CERT/rootCA.pem
+      ${if proxy != null then "export HTTP_PROXY=${proxy}" else ""}
+      ${if proxy != null then "export HTTPS_PROXY=${proxy}" else ""}
+      ${if proxy != null then "export http_proxy=${proxy}" else ""}
+      ${if proxy != null then "export https_proxy=${proxy}" else ""}
+
+      env
 
       if ! [ -e $data/setup-done ]; then
         createuser -h$postgres ${name}
diff --git a/nix/fedi/mastodon/default.nix b/nix/fedi/mastodon/default.nix
index c20f573..aa94659 100644
--- a/nix/fedi/mastodon/default.nix
+++ b/nix/fedi/mastodon/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, name, host, users, version, ... }:
+{ pkgs, name, host, users, version, proxy, ... }:
 let
   mastodon = pkgs.callPackage ./build.nix { versionDef = version; };
   env = {
@@ -20,6 +20,8 @@ let
         run = pkgs.writeShellScript "run-web" ''
           cd ${mastodon}
 
+          exec >$MINIFEDI_LOG/${name}/web.log 2>$MINIFEDI_LOG/${name}/web.log
+
           export SOCKET=$MINIFEDI_RUN/${name}/web.sock
 
           puma -C config/puma.rb
@@ -28,13 +30,16 @@ let
       sidekiq = pkgs.linkFarm "sidekiq" {
         run = pkgs.writeShellScript "run-sidekiq" ''
           cd ${mastodon}
+          exec >$MINIFEDI_LOG/${name}/sidekiq.log 2>$MINIFEDI_LOG/${name}/sidekiq.log
           sidekiq
         '';
       };
-      streaming = pkgs.linkFarm "sidekiq" {
+      streaming = pkgs.linkFarm "streaming" {
         run = pkgs.writeShellScript "run-sidekiq" ''
           cd ${mastodon}
 
+          exec >$MINIFEDI_LOG/${name}/streaming.log 2>$MINIFEDI_LOG/${name}/streaming.log
+
           export SOCKET=$MINIFEDI_RUN/${name}/streaming.sock
 
           ${mastodon}/run-streaming.sh
@@ -63,11 +68,15 @@ in {
 
       data=$MINIFEDI_DATA/${name}
       run=$MINIFEDI_RUN/${name}
+      log=$MINIFEDI_LOG/${name}
       postgres=$MINIFEDI_RUN/postgres
 
       mkdir -p $data
       mkdir -p $data/files
       mkdir -p $run
+      mkdir -p $log
+
+      exec >$log/setup.log 2>$log/setup.log
 
       cd ${mastodon}
 
@@ -92,6 +101,7 @@ in {
       export REDIS_URL=unix://$MINIFEDI_RUN/redis/redis.sock
       export NIX_SSL_CERT_FILE=$MINIFEDI_CERT/rootCA.pem
       export PAPERCLIP_ROOT_PATH=$data/files
+      ${if proxy != null then "export http_proxy=${proxy}" else ""}
 
       s6-svwait -U $MINIFEDI_RUN/service/postgres
 
diff --git a/nix/services.nix b/nix/services.nix
index de6da7d..a0686b6 100644
--- a/nix/services.nix
+++ b/nix/services.nix
@@ -1,15 +1,10 @@
-{ pkgs, configFn }:
+{ pkgs, config }:
 let
-  instances = (configFn {
-    types = {
-      mastodon = import ./fedi/mastodon;
-      akkoma = import ./fedi/akkoma;
-      gotosocial = import ./fedi/gotosocial;
-    };
-  }).instances;
+  instances = config.instances;
+  util = import ./util.nix { inherit pkgs; };
   evaldInstances = builtins.listToAttrs (builtins.map (inst:
     pkgs.lib.attrsets.nameValuePair inst.name (inst.type ({
-      inherit pkgs;
+      inherit pkgs util;
       host = "${inst.name}.lvh.me";
       users = [
         {
@@ -43,6 +38,7 @@ let
           admin = false;
         }
       ];
+      proxy = if config.mitmproxy then "http://localhost:8080" else null;
     } // inst))) instances);
 in evaldInstances // {
   postgres = import ./support-services/postgres { inherit pkgs; };
@@ -51,4 +47,6 @@ in evaldInstances // {
     inherit pkgs;
     instances = evaldInstances;
   };
+} // pkgs.lib.attrsets.optionalAttrs config.mitmproxy {
+  mitmproxy = import ./support-services/mitmproxy { inherit pkgs; };
 }
diff --git a/nix/support-services/mitmproxy/default.nix b/nix/support-services/mitmproxy/default.nix
new file mode 100644
index 0000000..2e6c372
--- /dev/null
+++ b/nix/support-services/mitmproxy/default.nix
@@ -0,0 +1,18 @@
+{ pkgs }: {
+  service = pkgs.linkFarm "mitmproxy" {
+    run = pkgs.writeShellScript "run-mitmproxy" ''
+      set -e
+
+      mkdir -p $MINIFEDI_DATA/mitmproxy
+
+      exec >$MINIFEDI_LOG/mitmproxy.log 2>$MINIFEDI_LOG/mitmproxy.log
+
+      if ! [[ -e $MINIFEDI_DATA/mitmproxy/fullchain.pem ]]; then
+        CAROOT=$MINIFEDI_CERT ${pkgs.mkcert}/bin/mkcert -cert-file $MINIFEDI_DATA/mitmproxy/cert.pem -key-file $MINIFEDI_DATA/mitmproxy/key.pem *.lvh.me
+        cat $MINIFEDI_DATA/mitmproxy/key.pem $MINIFEDI_DATA/mitmproxy/cert.pem $MINIFEDI_CERT/rootCA.pem > $MINIFEDI_DATA/mitmproxy/fullchain.pem
+      fi
+
+      exec ${pkgs.mitmproxy}/bin/mitmweb --certs $MINIFEDI_DATA/mitmproxy/fullchain.pem -k -v  
+    '';
+  };
+}
diff --git a/nix/support-services/nginx/default.nix b/nix/support-services/nginx/default.nix
index 02d2cdb..96afe03 100644
--- a/nix/support-services/nginx/default.nix
+++ b/nix/support-services/nginx/default.nix
@@ -36,6 +36,8 @@ in {
       mkdir -p $MINIFEDI_DATA/nginx
       mkdir -p $MINIFEDI_RUN/nginx
 
+      exec >$MINIFEDI_LOG/nginx.log 2>$MINIFEDI_LOG/web.log
+
       if ! [[ -e $MINIFEDI_DATA/nginx/fullchain.pem ]]; then
         CAROOT=$MINIFEDI_CERT ${pkgs.mkcert}/bin/mkcert -cert-file $MINIFEDI_DATA/nginx/cert.pem -key-file $MINIFEDI_DATA/nginx/key.pem *.lvh.me
         cat $MINIFEDI_DATA/nginx/cert.pem $MINIFEDI_CERT/rootCA.pem > $MINIFEDI_DATA/nginx/fullchain.pem
@@ -43,7 +45,7 @@ in {
 
       cd $MINIFEDI_DATA
       cat ${config} | envsubst '$MINIFEDI_DATA $MINIFEDI_RUN' > $MINIFEDI_DATA/nginx/nginx.conf
-      ${pkgs.nginx}/bin/nginx -c $MINIFEDI_DATA/nginx/nginx.conf -e $MINIFEDI_DATA/nginx/error.log
+      exec ${pkgs.nginx}/bin/nginx -c $MINIFEDI_DATA/nginx/nginx.conf -e $MINIFEDI_DATA/nginx/error.log
     '';
   };
 }
diff --git a/nix/support-services/postgres/default.nix b/nix/support-services/postgres/default.nix
index 36d9132..c2df9e6 100644
--- a/nix/support-services/postgres/default.nix
+++ b/nix/support-services/postgres/default.nix
@@ -3,6 +3,8 @@
 {
   service = pkgs.linkFarm "postgres" {
     run = pkgs.writeShellScript "run-postgres-outer" ''
+      exec >$MINIFEDI_LOG/postgres.log 2>$MINIFEDI_LOG/postgres.log
+
       exec ${pkgs.s6}/bin/s6-notifyoncheck ${
         pkgs.writeShellScript "run-postgres-inner" ''
           export PATH=${pkgs.gettext}/bin:$PATH
diff --git a/nix/support-services/redis/default.nix b/nix/support-services/redis/default.nix
index 4da9158..c6a8d23 100644
--- a/nix/support-services/redis/default.nix
+++ b/nix/support-services/redis/default.nix
@@ -5,15 +5,17 @@ let
     protected-mode yes
   '';
 in {
-  service = pkgs.linkFarm "nginx" {
-    run = pkgs.writeShellScript "run-nginx" ''
+  service = pkgs.linkFarm "redis" {
+    run = pkgs.writeShellScript "run-redis" ''
       set -e
 
       mkdir -p $MINIFEDI_DATA/redis
       mkdir -p $MINIFEDI_RUN/redis
 
+      exec >$MINIFEDI_LOG/redis.log 2>$MINIFEDI_LOG/redis.log
+
       cd $MINIFEDI_RUN/redis
-      ${pkgs.redis}/bin/redis-server ${config} --unixsocket $MINIFEDI_RUN/redis/redis.sock
+      exec ${pkgs.redis}/bin/redis-server ${config} --unixsocket $MINIFEDI_RUN/redis/redis.sock
     '';
   };
 }
diff --git a/nix/util.nix b/nix/util.nix
new file mode 100644
index 0000000..1ce4c72
--- /dev/null
+++ b/nix/util.nix
@@ -0,0 +1,37 @@
+{ pkgs }:
+
+rec {
+  portFromString = string:
+    let
+      hash = builtins.hashString "sha256" string;
+      portHex = builtins.substring 0 4 hash;
+      portHexChars = pkgs.lib.strings.stringToCharacters portHex;
+      hexDigitToNum = n:
+        let
+          map = {
+            "0" = 0;
+            "1" = 1;
+            "2" = 2;
+            "3" = 3;
+            "4" = 4;
+            "5" = 5;
+            "6" = 6;
+            "7" = 7;
+            "8" = 8;
+            "9" = 9;
+            "a" = 10;
+            "b" = 11;
+            "c" = 12;
+            "d" = 13;
+            "e" = 14;
+            "f" = 15;
+          };
+        in map.${n};
+      portFromHash =
+        pkgs.lib.lists.foldl (prev: n: (hexDigitToNum n) + (prev * 16)) 0
+        portHexChars;
+    in if portFromHash <= 1024 then
+      portFromString "retry_${string}"
+    else
+      portFromHash;
+}