Cisco Expressway IP Port Usage for Firewall Traversal. Cisco Expressway X8.1 D December 2013
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1 Cisco Expressway IP Port Usage for Firewall Traversal Cisco Expressway X8.1 D December 2013
2 Contents: Cisco Expressway IP port usage Which IP ports are used with Cisco Expressway? Which IP ports need to be allowed through firewalls? Format of information Traversing firewalls Administration SIP calls H.323 calls Internal Administration SIP calls H.323 calls 2
3 Guide to this document: format of information Source of messaging Server Direction firewall needs to be opened Destination of messaging Management control to public to public Direction of management / calls S = Source port, typically Details of what defines the IP port ID / range DNS server Destination of messaging: DNS UDP S UDP Source of messaging: Destination of messaging: IP port letter reference for more details default / expected port range in italics Firewall needs to have a pinhole open for at least all s at source to all s at listener Source of messaging: IP port letter reference for more details default / expected port range in italics When a firewall allows an outbound message through, it is assumed that responses (up to about 20 to 30 seconds after the original send) will be allowed back through the firewall 3
4 Administration: Cisco Management system Management system Management control Private network Management control Private network n/a n/a management computer(s) management computer(s) http TCP S TCP NTP UDP UDP https ssh TCP S TCP S TCP TCP LDAP TCP http (feedback to TMS) TCP TCP S TCP S SNMP UDP S UDP DNS UDP UDP S S = Source port, typically 4
5 Administration: Cisco Management system (listening) port PC Management control Private to Management control to private http https ssh SNMP S = Source port, typically management computer(s) TCP S TCP S TCP S UDP S Private to TCP TCP TCP UDP management computer(s) NTP UDP LDAP (for login) TCP 389 or or 636 Syslog UDP to private UDP TCP Ue to UDP Ve to Ue = Expressway TCP ephemeral port range defaults to to Ve = Expressway UDP ephemeral port range defaults to to Open ports only for the management methods to be used 5
6 Administration: Cisco Server Management control to public to public DNS Server DNS UDP S UDP S = Source port, typically 6
7 Unified Communications : to Unified CM, IM&P IM&P Unified CM-UDS Management system Management control Private network n/a Unified CM, IM and Presence servers and CUC Ue = Expressway TCP ephemeral port range defaults to XMPP (IM and Presence) TCP 7400 (IM&P server) TCP Ue to UDS (provisioning and phonebook) HTTP (configuration file retrieval) TCP 8443 (Unified CM server) TCP 6970 (Unified CM server) TCP Ue to TCP Ue to CUC (voic ) TCP 443 (CUC server) TCP Ue to
8 Unified Communications : Control (private) to Expressway () IM&P Unified CM-UDS server (listening) port A = Protocols > SIP > TCP Outbound port start to end: default = to Message direction XMPP (IM and Presence) SSH (HTTP/S tunnels) SIP signaling SIP media Inbound and outbound calls TCP Ue to TCP Ue to TCP & TLS A to Private to TCP 7400 TCP 2222 TCP and TLS B to * B = Zones > Traversal Client > SIP port, typically 7001 for first traversal zone, 7002 for second etc. R = On Large VM server deployments you can configure a range of TURN request s Ue = Expressway TCP ephemeral port range defaults to to Y C = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * Y E = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). TURN server control UDP UDP 3478 (to 3483) R 8
9 Unified Communications: Expressway () to public internet IM&P Unified CM-UDS Message direction endpoint server (listening) port Outbound to an endpoint in the server (listening) port endpoint Inbound from an endpoint in the to to XMPP (IM and Presence) UDS (phonebook and provisioning) TURN server control / media SIP signaling Address of Any IP address Address of Any IP address n/a n/a TCP 5222 TCP S n/a n/a TCP 8443 TCP S n/a n/a UDP 3478 (to 3483) R / to TLS to TLS S TLS 5061 UDP S TLS S N = Expressway waits until it receives media, then it sends its media to the IP port from which the media was received (egress port of the media from the far end non SIP-aware firewall): any port R = On Large VM server deployments you can configure a range of TURN request s S = Source port, typically Y E = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). SIP media UDP N UDP N 9
10 SIP traversal call Call direction SIP signaling Assent RTP (traversal media) Assent RTCP (traversal media) Inbound and outbound calls TCP & TLS A to Private to TCP and TLS B to * to * A = Protocols > SIP > TCP Outbound port start to end: default = to B = Zones > Traversal Client > SIP port, typically 7001 for first traversal zone, 7002 for second etc. Y C = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * Y E = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). 10
11 SIP call to endpoint with public Call direction endpoint server (listening) port Outbound to an endpoint in the endpoint Inbound from an endpoint in the to to SIP signaling RTP RTCP UDP C 5060 TCP & TLS A to Any UDP & TCP & TLS F 5060 or UDP: C 5060 TCP: K 5060 TLS: L 5061 Any UDP G 5060 or TCP & TLS H C = Protocols > SIP > UDP port: default = 5060 A = Protocols > SIP > TCP Outbound port start to end: default = to F = IP port is defined by DNS lookup; any port >= 1024, often 5060 for UDP K = Protocols > SIP > TCP port: default = 5060 L = Protocols > SIP > TLS port: default =5061 G = any port, often 5060 for hard endpoints H = any port Y E = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * E = Endpoint media port range; value used is specified in the SDP: = any IP port above 1024 = to * for another Expressway = 2326 to 2385 for MXP static setting = to for MXP dynamic setting * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). 11
12 SIP call to endpoint behind non SIP-aware firewall Call direction endpoint server (listening) port Outbound to an endpoint behind a firewall endpoint Inbound from an endpoint behind a firewall to to SIP signaling RTP RTCP UDP C 5060 TCP & TLS A to Any UDP & TCP & TLS F 5060 or UDP N UDP N UDP: C 5060 TCP: K 5060 TLS: L 5061 Any UDP, TCP & TLS: Q UDP N UDP N C = Protocols > SIP > UDP port: default = 5060 A = Protocols > SIP > TCP Outbound port start to end: default = to F = IP port is defined by DNS lookup; any port >= 1024, often 5060 for UDP K = Protocols > SIP > TCP port: default = 5060 L = Protocols > SIP > TLS port: default =5061 Q = Egress IP port from far end non-nat aware firewall: any port Y E = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * N = Expressway waits until it receives media, then it sends its media to the IP port from which the media was received (egress port of the media from the far end non SIP-aware firewall): any port >= 1024 * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). 12
13 SIP additional ports for ICE endpoint server (listening) port endpoint message direction Outbound from Expressway to endpoint in internet Inbound from an endpoint in internet to Expressway to to TURN server control TURN server media Any N/A N/A UDP R 3478 (to 3483) UDP to UDP N UDP to Any UDP M UDP N M = IP port of signalling from endpoint may be ephemeral IP port of endpoint (if no firewall), or IP port of the outside firewall : = any IP port above 1024 N = IP port of relevant ICE candidate host IP port, Server reflexive IP port (outside firewall port) or TURN server port: = any IP port above 1024 R = On Large VM server deployments you can configure a range of TURN request listening ports 13
14 H.323 traversal call using Assent Call direction Initial RAS connection Q 931 / H.225 signaling Inbound and outbound calls UDP 1719 TCP P H.245 TCP P Assent RTP (traversal media) Private to UDP D 6001 TCP T 2776 TCP T to * P = Protocols > H.323 > Gatekeeper > Call signaling port range start to end: default = D = Zones > Traversal Zone > H.323 port, typically 6001 for first traversal zone, 6002 for second etc. T = Traversal > Ports > H.323 Assent call signaling port: default = 2776 Y C = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * Y E = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). Assent RTCP (traversal media) to * 14
15 H.323 traversal call using H / 19 non-muxed media Call direction Initial RAS connection Q 931 / H.225 signaling Inbound and outbound calls UDP 1719 TCP P H.245 TCP P Assent RTP (traversal media) Assent RTCP (traversal media) Private to UDP D 6001 TCP M 1720 TCP U 2777 P = Protocols > H.323 > Gatekeeper > Call signaling port range start to end: default = D = Zones > Traversal Zone > H.323 port, typically 6001 for first traversal zone, 6002 for second etc. M = Protocols > H.323 Call signaling TCP port: default = 1720 U = Traversal > Ports > H.323 H call signaling port: default = 2777 Y C = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * Y E = Local Zone < Traversal Subzone > Traversal Media port start to end (configured on ) : default = to * * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). 15
16 H.323 traversal call using H / 19 multiplexed media Call direction Initial RAS connection Q 931 / H.225 signaling Inbound and outbound calls UDP 1719 TCP P H.245 TCP P Assent RTP (traversal media) Assent RTCP (traversal media) Private to UDP D 6001 TCP M 1720 TCP U to * to * P = Protocols > H.323 > Gatekeeper > Call signaling port range start to end: default = D = Zones > Traversal Zone > H.323 port, typically 6001 for first traversal zone, 6002 for second etc. M = Protocols > H.323 Call signaling TCP port: default = 1720 U = Traversal > Ports > H.323 H call signaling port: default = 2777 Y C = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * Y E = Local Zone < Traversal Subzone > Traversal Media port start to end (configured on ) : default = to * * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). 16
17 H.323 call with a non-registered endpoint with public IP Call direction source port endpoint server (listening) port Outbound to an endpoint in the endpoint Inbound from an endpoint in the to to Initial RAS connection Q 931 / H.225 signaling Any Any TCP P H.245 TCP P RTP RTCP to to TCP G 1720 TCP H TCP M 1720 TCP P to to TCP K 1720 TCP H >=1024 P = Protocols > H.323 > Gatekeeper > Call signaling port range start to end: default = G = Endpoint signaling port, specified by a) IP Port in call request b) DNS lookup for URI to call c) 1720 if but no port specified Can be: any port, typically 1720 M = Protocols > H.323 Call signaling TCP port: default = 1720 K = Endpoint signaling port: any port, typically 1720 H = Endpoint H.245 signaling port: = any IP port = to another Expressway = 5555 to 5574 for MXP static setting = to for MXP dynamic setting Y E = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * E = Endpoint media port range; value used is specified in codec negotiations: = any IP port above 1024 = to * for another Expressway = 2326 to 2385 for MXP static setting = to for MXP dynamic setting 17
18 SIP: internal Endpoint Endpoint Call direction to endpoint Endpoint to n/a n/a SIP signaling RTP RTCP UDP C 5060 TCP & TLS A to of endpoint UDP & TCP & TLS F 5060 or UDP: C 5060 TCP: K 5060 TLS: L 5061 of endpoint UDP G 5060 or TCP & TLS H >=1024 C = Protocols > SIP > UDP port: default = 5060 A = Protocols > SIP > TCP Outbound port start to end: default = to F = IP port is defined by DNS lookup; any port >= 1024, often 5060 for UDP K = Protocols > SIP > TCP port: default = 5060 L = Protocols > SIP > TLS port: default =5061 G = any port, often 5060 for hard endpoints H = any port Y C = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * E = Endpoint media port range; value used is specified in the SDP: = any IP port above 1024 = to * for another Expressway = 2326 to 2385 for MXP static setting = to for MXP dynamic setting * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). 18
19 H.323: internal Endpoint Endpoint Call direction to endpoint Endpoint to n/a n/a Initial RAS connection Q 931 / H.225 signaling Any - - UDP 1719 TCP P H.245 TCP P RTP RTCP TCP G 1720 TCP H TCP M 1720 TCP P Any UDP J 1719 TCP K 1720 TCP H >=1024 J = Endpoint RAS, typically 1719 P = Protocols > H.323 > Gatekeeper > Call signaling port range start to end: default = G = Endpoint signaling port, any port, typically 1720 M = Protocols > H.323 Call signaling TCP port: default = 1720 K = Endpoint signaling port: any port, typically 1720 H = Endpoint H.245 signaling port: = any IP port = to another Expressway = 5555 to 5574 for MXP static setting = to for MXP dynamic setting Y C = Local Zone > Traversal Subzone > Traversal Media port start to end (configured on ): default = to * E = Endpoint media port range; value used is specified in codec negotiations: = any IP port above 1024 = to * for another Expressway = 2326 to 2385 for MXP static setting = to for MXP dynamic setting * The first 2 ports in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range to are used). 19
20 SIP B2BUA and Microsoft Lync Lync Client 3478 outbound UDP required Lync Front-End Lync Edge Server Public IP only NAT not supported Lync Client 3478 *, inbound UDP if the Expressway is used for media only to NAT Lync gateway Expressway B2BUA 3478 * outbound UDP from B2BUA to Expressway (assumes response back allowed) Internal Firewall Expressway Only Internal IP needed External Firewall Public NAT supported on Expressway Expressway IP can be private * On Large Expressway VM server deployments you can configure a range of TURN request s (3478 to 3483). 20
21 THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY. The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB s public domain version of the UNIX operating system. All rights reserved. Copyright 1981, Regents of the University of California. NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED AS IS WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at Third party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1005R) Any Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual es or phone numbers in illustrative content is unintentional and coincidental Cisco Systems, Inc. All rights reserved.
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