Overview
This article explains how you can configure custom DHCP options. For more information, refer to the Dynamic Host Configuration Protocol (DHCP) and Bootstrap Protocol (BOOTP) Parameters.
Default DHCP options are Default Gateway, DNS server, and Lease time.
Process
- Open Configuration > DHCP Server.
- Click on Configure scopes manually.
- Click on Yes to confirm.
- Click on the Edit button to edit DHCP scope settings.
- Click on the Add button to add new DHCP option
- Choose the necessary option from the drop-down list and fill out the value accordingly.
- Click on Ok to close the Edit Option window.
- Click on Ok to close the Edit Scope window.
- Click on Apply to save the changes
Note: Kerio Control supports a variety of DHCP options, but not all of them. Here is the full list of supported options:
| 002: | Time offset |
| 003: | Default gateway |
| 004: | Time server |
| 005: | Name server |
| 006: | DNS server |
| 007: | Log server |
| 008: | Cookie server |
| 009: | LPR server |
| 010: | Impress server |
| 011: | Resource location server |
| 012: | Host name |
| 013: | Boot file size |
| 014: | Merit dump file |
| 015: | Domain name |
| 016: | Swap server |
| 017: | Root path |
| 018: | Extensions path |
| 019: | IP forwarding |
| 020: | Non-local source routing |
| 021: | Policy filter |
| 022: | Maximum datagram size |
| 023: | Default time-to-live |
| 024: | Path MTU aging timeout |
| 025: | Path MTU table |
| 026: | Interface MTU |
| 027: | All subnets are local |
| 028: | Broadcast address |
| 029: | Perform mask discovery |
| 030: | Mask supplier |
| 031: | Perform router discovery |
| 032: | Router solicitation address |
| 033: | Static route (dest. - router) |
| 034: | Trailer encapsulation |
| 035: | ARP cache Timeout |
| 036: | Ethernet encapsulation |
| 037: | Default TTL |
| 038: | TCP Keepalive interval |
| 039: | TCP Keepalive garbage |
| 040: | Network information service |
| 041: | Network information server |
| 042: | Network time server |
| 043: | Vendor-specific information |
| 044: | WINS name server |
| 045: | WINS datagram server |
| 046: | WINS node type |
| 047: | WINS scope |
| 048: | Font server |
| 049: | Display manager |
| 051: | Lease time |
| 060: | Class identifier |
| 064: | NIS+ domain |
| 065: | NIS+ servers |
| 066: | TFTP server name |
| 067: | Bootfile name |
| 068: | Mobile IP home agent |
| 069: | SMTP server |
| 070: | POP3 server |
| 071: | NNTP server |
| 072: | WWW server |
| 073: | FINGER server |
| 074: | IRC server |
| 075: | StreetTalk server |
| 076: | STDA server |
| 121: | Classless static route (dest./mask - router) |
| 249: | Classless static route (Microsoft) |
| 252: | MSIE proxy autodiscovery |
Confirmation
The necessary parameter is configured in the DHCP settings.