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ProtocolCodes
110
FTP

110 Restart Marker Reply

The server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted.

On this page

When You See This Code

During a resumed file transfer when the server confirms the restart position in the data stream.

How to Fix

No fix needed — this is a normal response during transfer recovery. If restarts keep failing, verify the marker format matches what your client expects.

Specification

View RFC / Specification →

Compare With

120 Service Ready Soon 125 Data Connection Open 150 File Status OK 200 Command OK 202 Command Superfluous 211 System Status 212 Directory Status 213 File Status 214 Help Message 215 System Type 220 Service Ready 221 Closing Control Connection

Guides

FTP Reply Codes: Understanding File Transfer Responses DNS & Networking
TCP Three-Way Handshake and Connection Lifecycle DNS & Networking
Essential Network Debugging Tools: ping, traceroute, mtr, and tcpdump DNS & Networking
RFC 959: FTP Protocol Deep Dive Protocol Deep Dives
TLS 1.3: Faster, Simpler, More Secure Protocol Deep Dives
Migrating from FTP to SFTP: A Complete Transition Guide Migration & Upgrades
HTTP Access Log Management: Rotation, Parsing, and Analysis Production Infrastructure

Glossary

Status Code TLS Handshake TCP/IP Three-Way Handshake Port Number Firewall Proxy Server (Forward Proxy) Socket Request-Response Model RFC (Request for Comments) Connection-Oriented Half-Duplex Text vs Binary Protocol FTP Active Mode FTP Passive Mode FTP Control Channel FTP Data Channel SFTP (SSH File Transfer Protocol) FTPS (FTP Secure) FTP Reply Code FTP Anonymous Access FTP Transfer Mode (ASCII vs Binary) FTP Resume (REST Command) SCP (Secure Copy Protocol) FTP Chroot Jail WebDAV (Web Distributed Authoring and Versioning) rsync FTP MLSD (Machine-Readable Listing) FTP NAT Traversal Transfer Integrity FTP over TLS (RFC 4217) File Locking Bandwidth Throttling TLS Versions

Frequently Asked Questions

What is FTP 110 Restart Marker Reply?

The server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted.

When do you see FTP 110 Restart Marker Reply?

During a resumed file transfer when the server confirms the restart position in the data stream.

How to fix FTP 110 Restart Marker Reply?

No fix needed — this is a normal response during transfer recovery. If restarts keep failing, verify the marker format matches what your client expects.