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| CSN Number: |
02042401 |
Date: |
04.24.2002 |
| Submitted by: |
Gordon Daugherty |
Updated: |
11.13.2003 |
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| Firewall
ports to open for video conferencing |
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| Emblaze-VCON Product: |
Escort, Cruiser 75/150, Cruiser 384, MC6000, MC8000,MC9000, MXM,
ViGO, Falcon, |
| Non-Emblaze-VCON Product: |
Firewalls |
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Problem Description:
Video conferencing traffic is blocked on firewalls preventing two-way
audio and video conversations. If the firewall is not H.323 aware, you
will likely need to open select ports. |
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Resolution: For alternate solutions that do not
require opening specific firewall ports, see the Emblaze-VCON white paper on this
topic.
Most importantly, Emblaze-VCON announced in summer 2003 a family of products under
the SecureConnect
brand name. The products in the family offer secure firewall traversal
and encrypted communications.
The table below describes the typical ports used for H.323 traffic
flows.
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| Common/Required: |
| PORT |
TYPE |
PROTOCOL |
DESCRIPTION |
| 1719 |
Static |
UDP |
Gatekeeper RAS |
| 1720 |
Static |
TCP |
Q.931 (Call Setup) |
| 1024-65535 |
Dynamic |
TCP |
H.245(Call Parameters) |
| 1024-65535 |
Dynamic |
UDP (RTP) |
Video Data Streams |
| 1024-65535 |
Dynamic |
UDP (RTP) |
Audio Data Streams |
| 1024-65535 |
Dynamic |
UDP (RTCP) |
Control Information |
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| Optional: |
| PORT |
TYPE |
PROTOCOL |
DESCRIPTION |
| 389 |
Static |
TCP |
ILS Registration (LDAP) |
| 1002 |
Static |
TCP |
Site Server Registration (Windows 2000
Built-in LDAP) |
| 1503 |
Static |
TCP |
T.120 (Data Channel) |
| 1718 |
Static |
UDP |
Gatekeeper Discovery (requires
multicast address 224.0.1.41) |
| 22136 |
Static |
TCP |
Emblaze-VCON MXM - Remote Emblaze-VCON Endpoint Admin |
| 26505 |
Static |
TCP |
Emblaze-VCON MXM - Remote Console Login |
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Related Notes or Documents:
Traversing
Firewalls and Proxies with Video over IP (H.323): Issues and Solutions
Adobe PDF Document - 92K
File Date: Nov 13, 2003
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