Index: scripts/repository/commit_hook.php
===================================================================
--- scripts/repository/commit_hook.php
+++ scripts/repository/commit_hook.php
@@ -30,9 +30,10 @@
 // Figure out which user is writing the commit.
 
 if ($repository->isGit() || $repository->isHg()) {
-  $username = getenv('PHABRICATOR_USER');
+  $username = getenv(DiffusionCommitHookEngine::ENV_USER);
   if (!strlen($username)) {
-    throw new Exception(pht('usage: PHABRICATOR_USER should be defined!'));
+    throw new Exception(
+      pht('usage: %s should be defined!', DiffusionCommitHookEngine::ENV_USER));
   }
 
   // TODO: If this is a Mercurial repository, the hook we're responding to
@@ -41,8 +42,8 @@
 
 } else if ($repository->isSVN()) {
   // NOTE: In Subversion, the entire environment gets wiped so we can't read
-  // PHABRICATOR_USER. Instead, we've set "--tunnel-user" to specify the
-  // correct user; read this user out of the commit log.
+  // DiffusionCommitHookEngine::ENV_USER. Instead, we've set "--tunnel-user" to
+  // specify the correct user; read this user out of the commit log.
 
   if ($argc < 4) {
     throw new Exception(pht('usage: commit-hook <callsign> <repo> <txn>'));
@@ -86,6 +87,16 @@
 
 $engine->setStdin($stdin);
 
+$remote_address = getenv(DiffusionCommitHookEngine::ENV_REMOTE_ADDRESS);
+if (strlen($remote_address)) {
+  $engine->setRemoteAddress($remote_address);
+}
+
+$remote_protocol = getenv(DiffusionCommitHookEngine::ENV_REMOTE_PROTOCOL);
+if (strlen($remote_protocol)) {
+  $engine->setRemoteProtocol($remote_protocol);
+}
+
 try {
   $err = $engine->execute();
 } catch (DiffusionCommitHookRejectException $ex) {
Index: src/applications/diffusion/controller/DiffusionPushLogListController.php
===================================================================
--- src/applications/diffusion/controller/DiffusionPushLogListController.php
+++ src/applications/diffusion/controller/DiffusionPushLogListController.php
@@ -41,6 +41,10 @@
           ),
           $callsign),
         $this->getHandle($log->getPusherPHID())->renderLink(),
+        $log->getRemoteAddress()
+          ? long2ip($log->getRemoteAddress())
+          : null,
+        $log->getRemoteProtocol(),
         $log->getRefType(),
         $log->getRefName(),
         $log->getRefOldShort(),
@@ -54,6 +58,8 @@
         array(
           pht('Repository'),
           pht('Pusher'),
+          pht('From'),
+          pht('Via'),
           pht('Type'),
           pht('Name'),
           pht('Old'),
@@ -65,6 +71,8 @@
           '',
           '',
           '',
+          '',
+          '',
           'wide',
           'n',
           'n',
Index: src/applications/diffusion/controller/DiffusionServeController.php
===================================================================
--- src/applications/diffusion/controller/DiffusionServeController.php
+++ src/applications/diffusion/controller/DiffusionServeController.php
@@ -318,12 +318,11 @@
       'PATH_INFO' => $request_path,
 
       'REMOTE_USER' => $viewer->getUsername(),
-      'PHABRICATOR_USER' => $viewer->getUsername(),
 
       // TODO: Set these correctly.
       // GIT_COMMITTER_NAME
       // GIT_COMMITTER_EMAIL
-    );
+    ) + $this->getCommonEnvironment($viewer);
 
     $input = PhabricatorStartup::getRawInput();
 
@@ -416,9 +415,7 @@
       throw new Exception("Unable to find `hg` in PATH!");
     }
 
-    $env = array(
-      'PHABRICATOR_USER' => $viewer->getUsername(),
-    );
+    $env = $this->getCommonEnvironment($viewer);
     $input = PhabricatorStartup::getRawInput();
 
     $cmd = $request->getStr('cmd');
@@ -557,5 +554,15 @@
     return $has_pack && $is_hangup;
   }
 
+  private function getCommonEnvironment(PhabricatorUser $viewer) {
+    $remote_addr = $this->getRequest()->getRemoteAddr();
+
+    return array(
+      DiffusionCommitHookEngine::ENV_USER => $viewer->getUsername(),
+      DiffusionCommitHookEngine::ENV_REMOTE_ADDRESS => $remote_addr,
+      DiffusionCommitHookEngine::ENV_REMOTE_PROTOCOL => 'http',
+    );
+  }
+
 }
 
Index: src/applications/diffusion/engine/DiffusionCommitHookEngine.php
===================================================================
--- src/applications/diffusion/engine/DiffusionCommitHookEngine.php
+++ src/applications/diffusion/engine/DiffusionCommitHookEngine.php
@@ -7,12 +7,35 @@
  */
 final class DiffusionCommitHookEngine extends Phobject {
 
+  const ENV_USER = 'PHABRICATOR_USER';
+  const ENV_REMOTE_ADDRESS = 'PHABRICATOR_REMOTE_ADDRESS';
+  const ENV_REMOTE_PROTOCOL = 'PHABRICATOR_REMOTE_PROTOCOL';
+
   private $viewer;
   private $repository;
   private $stdin;
   private $subversionTransaction;
   private $subversionRepository;
+  private $remoteAddress;
+  private $remoteProtocol;
+
+  public function setRemoteProtocol($remote_protocol) {
+    $this->remoteProtocol = $remote_protocol;
+    return $this;
+  }
+
+  public function getRemoteProtocol() {
+    return $this->remoteProtocol;
+  }
 
+  public function setRemoteAddress($remote_address) {
+    $this->remoteAddress = $remote_address;
+    return $this;
+  }
+
+  public function getRemoteAddress() {
+    return $this->remoteAddress;
+  }
 
   public function setSubversionTransactionInfo($transaction, $repository) {
     $this->subversionTransaction = $transaction;
@@ -86,13 +109,21 @@
     $transaction_key = PhabricatorHash::digestForIndex(
       Filesystem::readRandomBytes(64));
 
+    // If whatever we have here isn't a valid IPv4 address, just store `null`.
+    // Older versions of PHP return `-1` on failure instead of `false`.
+    $remote_address = $this->getRemoteAddress();
+    $remote_address = max(0, ip2long($remote_address));
+    $remote_address = nonempty($remote_address, null);
+
+    $remote_protocol = $this->getRemoteProtocol();
+
     $logs = array();
     foreach ($updates as $update) {
       $log = PhabricatorRepositoryPushLog::initializeNewLog($this->getViewer())
         ->setRepositoryPHID($this->getRepository()->getPHID())
         ->setEpoch(time())
-        ->setRemoteAddress(null) // TODO: Populate this where possible.
-        ->setRemoteProtocol(null) // TODO: Populate this where possible.
+        ->setRemoteAddress($remote_address)
+        ->setRemoteProtocol($remote_protocol)
         ->setTransactionKey($transaction_key)
         ->setRefType($update['type'])
         ->setRefNameHash(PhabricatorHash::digestForIndex($update['ref']))
Index: src/applications/diffusion/ssh/DiffusionSSHWorkflow.php
===================================================================
--- src/applications/diffusion/ssh/DiffusionSSHWorkflow.php
+++ src/applications/diffusion/ssh/DiffusionSSHWorkflow.php
@@ -18,9 +18,19 @@
   }
 
   public function getEnvironment() {
-    return array(
-      'PHABRICATOR_USER' => $this->getUser()->getUsername(),
+    $env = array(
+      DiffusionCommitHookEngine::ENV_USER => $this->getUser()->getUsername(),
+      DiffusionCommitHookEngine::ENV_REMOTE_PROTOCOL => 'ssh',
     );
+
+    $ssh_client = getenv('SSH_CLIENT');
+    if ($ssh_client) {
+      // This has the format "<ip> <remote-port> <local-port>". Grab the IP.
+      $remote_address = head(explode(' ', $ssh_client));
+      $env[DiffusionCommitHookEngine::ENV_REMOTE_ADDRESS] = $remote_address;
+    }
+
+    return $env;
   }
 
   abstract protected function executeRepositoryOperations();