diff --git a/src/protocols/ssh/sftp.c b/src/protocols/ssh/sftp.c
index 2eee76e5..fed0f5c7 100644
--- a/src/protocols/ssh/sftp.c
+++ b/src/protocols/ssh/sftp.c
@@ -74,6 +74,11 @@ int guac_sftp_file_handler(guac_client* client, guac_stream* stream,
 
     /* Ensure filename is a valid filename and not a path */
     if (!__ssh_guac_valid_filename(filename)) {
+
+        guac_client_log(client, GUAC_LOG_DEBUG,
+                "Filename \"%s\" is invalid",
+                filename);
+
         guac_protocol_send_ack(client->socket, stream, "SFTP: Illegal filename",
                 GUAC_PROTOCOL_STATUS_CLIENT_BAD_REQUEST);
         guac_socket_flush(client->socket);
@@ -102,6 +107,11 @@ int guac_sftp_file_handler(guac_client* client, guac_stream* stream,
 
     /* If path + filename exceeds max length, abort */
     if (i == GUAC_SFTP_MAX_PATH) {
+
+        guac_client_log(client, GUAC_LOG_DEBUG,
+                "Filename exceeds maximum of %i characters",
+                GUAC_SFTP_MAX_PATH);
+
         guac_protocol_send_ack(client->socket, stream, "SFTP: Name too long", GUAC_PROTOCOL_STATUS_CLIENT_OVERRUN);
         guac_socket_flush(client->socket);
         return 0;
@@ -117,11 +127,16 @@ int guac_sftp_file_handler(guac_client* client, guac_stream* stream,
 
     /* Inform of status */
     if (file != NULL) {
+
+        guac_client_log(client, GUAC_LOG_DEBUG,
+                "File \"%s\" opened",
+                fullpath);
+
         guac_protocol_send_ack(client->socket, stream, "SFTP: File opened", GUAC_PROTOCOL_STATUS_SUCCESS);
         guac_socket_flush(client->socket);
     }
     else {
-        guac_client_log(client, GUAC_LOG_ERROR, "Unable to open file \"%s\": %s",
+        guac_client_log(client, GUAC_LOG_INFO, "Unable to open file \"%s\": %s",
                 fullpath, libssh2_sftp_last_error(client_data->sftp_session));
         guac_protocol_send_ack(client->socket, stream, "SFTP: Open failed", GUAC_PROTOCOL_STATUS_RESOURCE_NOT_FOUND);
         guac_socket_flush(client->socket);
@@ -146,13 +161,14 @@ int guac_sftp_blob_handler(guac_client* client, guac_stream* stream,
 
     /* Attempt write */
     if (libssh2_sftp_write(file, data, length) == length) {
+        guac_client_log(client, GUAC_LOG_DEBUG, "%i bytes written", length);
         guac_protocol_send_ack(client->socket, stream, "SFTP: OK", GUAC_PROTOCOL_STATUS_SUCCESS);
         guac_socket_flush(client->socket);
     }
 
     /* Inform of any errors */
     else {
-        guac_client_log(client, GUAC_LOG_ERROR, "Unable to write to file: %s",
+        guac_client_log(client, GUAC_LOG_INFO, "Unable to write to file: %s",
                 libssh2_sftp_last_error(client_data->sftp_session));
         guac_protocol_send_ack(client->socket, stream, "SFTP: Write failed", GUAC_PROTOCOL_STATUS_SERVER_ERROR);
         guac_socket_flush(client->socket);
@@ -169,11 +185,12 @@ int guac_sftp_end_handler(guac_client* client, guac_stream* stream) {
 
     /* Attempt to close file */
     if (libssh2_sftp_close(file) == 0) {
+        guac_client_log(client, GUAC_LOG_DEBUG, "File closed");
         guac_protocol_send_ack(client->socket, stream, "SFTP: OK", GUAC_PROTOCOL_STATUS_SUCCESS);
         guac_socket_flush(client->socket);
     }
     else {
-        guac_client_log(client, GUAC_LOG_ERROR, "Unable to close file");
+        guac_client_log(client, GUAC_LOG_INFO, "Unable to close file");
         guac_protocol_send_ack(client->socket, stream, "SFTP: Close failed", GUAC_PROTOCOL_STATUS_SERVER_ERROR);
         guac_socket_flush(client->socket);
     }
@@ -196,19 +213,25 @@ int guac_sftp_ack_handler(guac_client* client, guac_stream* stream,
         int bytes_read = libssh2_sftp_read(file, buffer, sizeof(buffer)); 
 
         /* If bytes read, send as blob */
-        if (bytes_read > 0)
+        if (bytes_read > 0) {
             guac_protocol_send_blob(client->socket, stream,
                     buffer, bytes_read);
 
+            guac_client_log(client, GUAC_LOG_DEBUG, "%i bytes sent to client",
+                    bytes_read);
+
+        }
+
         /* If EOF, send end */
         else if (bytes_read == 0) {
+            guac_client_log(client, GUAC_LOG_DEBUG, "File sent");
             guac_protocol_send_end(client->socket, stream);
             guac_client_free_stream(client, stream);
         }
 
         /* Otherwise, fail stream */
         else {
-            guac_client_log(client, GUAC_LOG_ERROR, "Error reading file: %s",
+            guac_client_log(client, GUAC_LOG_INFO, "Error reading file: %s",
                     libssh2_sftp_last_error(client_data->sftp_session));
             guac_protocol_send_end(client->socket, stream);
             guac_client_free_stream(client, stream);
@@ -236,7 +259,7 @@ guac_stream* guac_sftp_download_file(guac_client* client,
     file = libssh2_sftp_open(client_data->sftp_session, filename,
             LIBSSH2_FXF_READ, 0);
     if (file == NULL) {
-        guac_client_log(client, GUAC_LOG_ERROR, "Unable to read file \"%s\": %s",
+        guac_client_log(client, GUAC_LOG_INFO, "Unable to read file \"%s\": %s",
                 filename,
                 libssh2_sftp_last_error(client_data->sftp_session));
         return NULL;
@@ -253,6 +276,7 @@ guac_stream* guac_sftp_download_file(guac_client* client,
             "application/octet-stream", filename);
     guac_socket_flush(client->socket);
 
+    guac_client_log(client, GUAC_LOG_DEBUG, "Sending file \"%s\"", filename);
     return stream;
 
 }
@@ -272,6 +296,7 @@ void guac_sftp_set_upload_path(guac_client* client, char* path) {
 
     /* Copy path */
     memcpy(client_data->sftp_upload_path, path, length);
+    guac_client_log(client, GUAC_LOG_DEBUG, "Upload path set to \"%s\"", path);
 
 }
 
diff --git a/src/protocols/ssh/ssh_client.c b/src/protocols/ssh/ssh_client.c
index 5c9575d0..affce5df 100644
--- a/src/protocols/ssh/ssh_client.c
+++ b/src/protocols/ssh/ssh_client.c
@@ -112,7 +112,9 @@ static void __kbd_callback(const char *name, int name_len,
         responses[0].length = strlen(client_data->password);
     }
     else
-        guac_client_log(client, GUAC_LOG_INFO, "Unsupported number of keyboard-interactive prompts: %i", num_prompts);
+        guac_client_log(client, GUAC_LOG_WARNING,
+                "Unsupported number of keyboard-interactive prompts: %i",
+                num_prompts);
 
 }
 
@@ -161,13 +163,13 @@ static LIBSSH2_SESSION* __guac_ssh_create_session(guac_client* client,
                 connected_address, sizeof(connected_address),
                 connected_port, sizeof(connected_port),
                 NI_NUMERICHOST | NI_NUMERICSERV)))
-            guac_client_log(client, GUAC_LOG_INFO, "Unable to resolve host: %s", gai_strerror(retval));
+            guac_client_log(client, GUAC_LOG_DEBUG, "Unable to resolve host: %s", gai_strerror(retval));
 
         /* Connect */
         if (connect(fd, current_address->ai_addr,
                         current_address->ai_addrlen) == 0) {
 
-            guac_client_log(client, GUAC_LOG_INFO, "Successfully connected to "
+            guac_client_log(client, GUAC_LOG_DEBUG, "Successfully connected to "
                     "host %s, port %s", connected_address, connected_port);
 
             /* Done if successful connect */
@@ -177,7 +179,7 @@ static LIBSSH2_SESSION* __guac_ssh_create_session(guac_client* client,
 
         /* Otherwise log information regarding bind failure */
         else
-            guac_client_log(client, GUAC_LOG_INFO, "Unable to connect to "
+            guac_client_log(client, GUAC_LOG_DEBUG, "Unable to connect to "
                     "host %s, port %s: %s",
                     connected_address, connected_port, strerror(errno));
 
@@ -214,7 +216,7 @@ static LIBSSH2_SESSION* __guac_ssh_create_session(guac_client* client,
 
     /* Get list of suported authentication methods */
     user_authlist = libssh2_userauth_list(session, client_data->username, strlen(client_data->username));
-    guac_client_log(client, GUAC_LOG_INFO, "Supported authentication methods: %s", user_authlist);
+    guac_client_log(client, GUAC_LOG_DEBUG, "Supported authentication methods: %s", user_authlist);
 
     /* Authenticate with key if available */
     if (client_data->key != NULL) {
@@ -242,11 +244,11 @@ static LIBSSH2_SESSION* __guac_ssh_create_session(guac_client* client,
 
     /* Authenticate with password */
     if (strstr(user_authlist, "password") != NULL) {
-        guac_client_log(client, GUAC_LOG_INFO, "Using password authentication method");
+        guac_client_log(client, GUAC_LOG_DEBUG, "Using password authentication method");
         retval = libssh2_userauth_password(session, client_data->username, client_data->password);
     }
     else if (strstr(user_authlist, "keyboard-interactive") != NULL) {
-        guac_client_log(client, GUAC_LOG_INFO, "Using keyboard-interactive authentication method");
+        guac_client_log(client, GUAC_LOG_DEBUG, "Using keyboard-interactive authentication method");
         retval = libssh2_userauth_keyboard_interactive(session, client_data->username, &__kbd_callback);
     }
     else {
@@ -442,7 +444,7 @@ void* ssh_client_thread(void* data) {
         client_data->term->file_download_handler = guac_sftp_download_file;
 
         /* Create SSH session specific for SFTP */
-        guac_client_log(client, GUAC_LOG_INFO, "Reconnecting for SFTP...");
+        guac_client_log(client, GUAC_LOG_DEBUG, "Reconnecting for SFTP...");
         client_data->sftp_ssh_session = __guac_ssh_create_session(client, NULL);
         if (client_data->sftp_ssh_session == NULL) {
             /* Already aborted within __guac_ssh_create_session() */
@@ -459,7 +461,7 @@ void* ssh_client_thread(void* data) {
         /* Set file handler */
         client->file_handler = guac_sftp_file_handler;
 
-        guac_client_log(client, GUAC_LOG_INFO, "SFTP session initialized");
+        guac_client_log(client, GUAC_LOG_DEBUG, "SFTP session initialized");
 
     }
 
diff --git a/src/protocols/telnet/guac_handlers.c b/src/protocols/telnet/guac_handlers.c
index aba5d3c9..e50c58d7 100644
--- a/src/protocols/telnet/guac_handlers.c
+++ b/src/protocols/telnet/guac_handlers.c
@@ -63,7 +63,8 @@ int guac_telnet_client_key_handler(guac_client* client, int keysym, int pressed)
     /* Stop searching for password */
     if (client_data->password_regex != NULL) {
 
-        guac_client_log(client, GUAC_LOG_INFO, "Stopping password prompt search due to user input.");
+        guac_client_log(client, GUAC_LOG_DEBUG,
+                "Stopping password prompt search due to user input.");
 
         regfree(client_data->password_regex);
         free(client_data->password_regex);
@@ -74,7 +75,8 @@ int guac_telnet_client_key_handler(guac_client* client, int keysym, int pressed)
     /* Stop searching for username */
     if (client_data->username_regex != NULL) {
 
-        guac_client_log(client, GUAC_LOG_INFO, "Stopping username prompt search due to user input.");
+        guac_client_log(client, GUAC_LOG_DEBUG,
+                "Stopping username prompt search due to user input.");
 
         regfree(client_data->username_regex);
         free(client_data->username_regex);
diff --git a/src/protocols/telnet/telnet_client.c b/src/protocols/telnet/telnet_client.c
index 0acc2407..6adf145f 100644
--- a/src/protocols/telnet/telnet_client.c
+++ b/src/protocols/telnet/telnet_client.c
@@ -158,6 +158,7 @@ static void __guac_telnet_event_handler(telnet_t* telnet, telnet_event_t* event,
             if (client_data->username_regex != NULL) {
                 if (__guac_telnet_regex_search(client, client_data->username_regex, client_data->username,
                                            event->data.buffer, event->data.size)) {
+                    guac_client_log(client, GUAC_LOG_DEBUG, "Username sent");
                     regfree(client_data->username_regex);
                     free(client_data->username_regex);
                     client_data->username_regex = NULL;
@@ -169,6 +170,8 @@ static void __guac_telnet_event_handler(telnet_t* telnet, telnet_event_t* event,
                 if (__guac_telnet_regex_search(client, client_data->password_regex, client_data->password,
                                            event->data.buffer, event->data.size)) {
 
+                    guac_client_log(client, GUAC_LOG_DEBUG, "Password sent");
+
                     /* Do not continue searching for username once password is sent */
                     if (client_data->username_regex != NULL) {
                         regfree(client_data->username_regex);
@@ -227,7 +230,7 @@ static void __guac_telnet_event_handler(telnet_t* telnet, telnet_event_t* event,
 
         /* Connection warnings */
         case TELNET_EV_WARNING:
-            guac_client_log(client, GUAC_LOG_INFO, "%s", event->error.msg);
+            guac_client_log(client, GUAC_LOG_WARNING, "%s", event->error.msg);
             break;
 
         /* Connection errors */
@@ -322,13 +325,13 @@ static telnet_t* __guac_telnet_create_session(guac_client* client) {
                 connected_address, sizeof(connected_address),
                 connected_port, sizeof(connected_port),
                 NI_NUMERICHOST | NI_NUMERICSERV)))
-            guac_client_log(client, GUAC_LOG_INFO, "Unable to resolve host: %s", gai_strerror(retval));
+            guac_client_log(client, GUAC_LOG_DEBUG, "Unable to resolve host: %s", gai_strerror(retval));
 
         /* Connect */
         if (connect(fd, current_address->ai_addr,
                         current_address->ai_addrlen) == 0) {
 
-            guac_client_log(client, GUAC_LOG_INFO, "Successfully connected to "
+            guac_client_log(client, GUAC_LOG_DEBUG, "Successfully connected to "
                     "host %s, port %s", connected_address, connected_port);
 
             /* Done if successful connect */
@@ -338,7 +341,7 @@ static telnet_t* __guac_telnet_create_session(guac_client* client) {
 
         /* Otherwise log information regarding bind failure */
         else
-            guac_client_log(client, GUAC_LOG_INFO, "Unable to connect to "
+            guac_client_log(client, GUAC_LOG_DEBUG, "Unable to connect to "
                     "host %s, port %s: %s",
                     connected_address, connected_port, strerror(errno));
 
diff --git a/src/terminal/terminal.c b/src/terminal/terminal.c
index 3d9b5702..3744d1ea 100644
--- a/src/terminal/terminal.c
+++ b/src/terminal/terminal.c
@@ -1124,6 +1124,9 @@ int guac_terminal_resize(guac_terminal* terminal, int width, int height) {
     /* If size has changed */
     if (columns != terminal->term_width || rows != terminal->term_height) {
 
+        guac_client_log(terminal->client, GUAC_LOG_DEBUG,
+                "Resizing terminal to %ix%i", rows, columns);
+
         /* Resize terminal */
         __guac_terminal_resize(terminal, columns, rows);
 
@@ -1298,6 +1301,8 @@ static int __guac_terminal_send_key(guac_terminal* term, int keysym, int pressed
             if (keysym == 0xFFFF) return guac_terminal_send_string(term, "\x1B[3~"); /* Delete */
 
             /* Ignore unknown keys */
+            guac_client_log(term->client, GUAC_LOG_DEBUG,
+                    "Ignoring unknown keysym: 0x%X", keysym);
         }
 
     }
diff --git a/src/terminal/terminal_handlers.c b/src/terminal/terminal_handlers.c
index 1fac3992..49a45df1 100644
--- a/src/terminal/terminal_handlers.c
+++ b/src/terminal/terminal_handlers.c
@@ -897,6 +897,9 @@ int guac_terminal_set_directory(guac_terminal* term, unsigned char c) {
         term->char_handler = guac_terminal_echo;
         if (term->upload_path_handler)
             term->upload_path_handler(term->client, filename);
+        else
+            guac_client_log(term->client, GUAC_LOG_DEBUG,
+                    "Cannot set upload path. File is transfer not enabled.");
         length = 0;
     }
 
@@ -919,6 +922,9 @@ int guac_terminal_download(guac_terminal* term, unsigned char c) {
         term->char_handler = guac_terminal_echo;
         if (term->file_download_handler)
             term->file_download_handler(term->client, filename);
+        else
+            guac_client_log(term->client, GUAC_LOG_DEBUG,
+                    "Cannot send file. File is transfer not enabled.");
         length = 0;
     }