Datagram Transport Layer Security

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Script error: No such module "Distinguish". Template:Short description Datagram Transport Layer Security (DTLS) is a communications protocol providing security to datagram-based applications by allowing them to communicate in a way designedTemplate:Ref RFCTemplate:Ref RFCTemplate:Ref RFC to prevent eavesdropping, tampering, or message forgery. The DTLS protocol is based on the stream-oriented Transport Layer Security (TLS) protocol and is intended to provide similar security guarantees. The DTLS protocol datagram preserves the semantics of the underlying transport—the application does not suffer from the delays associated with stream protocols, but because it uses User Datagram Protocol (UDP) or Stream Control Transmission Protocol (SCTP), the application has to deal with packet reordering, loss of datagram and data larger than the size of a datagram network packet. Because DTLS uses UDP or SCTP rather than TCP it avoids the TCP meltdown problem[1][2] when being used to create a VPN tunnel.

Definition

The following documents define DTLS:

DTLS 1.0 is based on TLS 1.1, DTLS 1.2 is based on TLS 1.2, and DTLS 1.3 is based on TLS 1.3. There is no DTLS 1.1 because this version-number was skipped in order to harmonize version numbers with TLS.Template:Ref RFC Like previous DTLS versions, DTLS 1.3 is intended to provide "equivalent security guarantees [to TLS 1.3] with the exception of order protection/non-replayability".[4]

Implementations

Libraries

Template:Main article Template:More citations needed

Library support for DTLS
Implementation DTLS 1.0Template:Ref RFC DTLS 1.2Template:Ref RFC DTLS 1.3Template:Ref RFC
Botan Yes Yes
cryptlib No No
GnuTLS Yes Yes
Java Secure Socket Extension Yes Yes
LibreSSL Yes Yes[5]
libsystools[6] Yes No
MatrixSSL Yes Yes
mbed TLS (previously PolarSSL) Yes[7] Yes[7]
Network Security Services Yes[8] Yes[9]
OpenSSL Yes Yes[10]
PyDTLS[11][12] Yes Yes
Python3-dtls[13][14] Yes Yes
RSA BSAFE No No
s2n No No
Schannel XP/2003, Vista/2008 No No
Schannel 7/2008R2, 8/2012, 8.1/2012R2, 10 Yes[15] No[15]
Schannel 10 (1607), 2016 Yes Yes[16]
Secure Transport OS X 10.2–10.7 / iOS 1–4 No No
Secure Transport OS X 10.8–10.10 / iOS 5–8 Yes[17] No
SharkSSL No No
tinydtls [18] No Yes
Waher.Security.DTLS [19] No Yes
wolfSSL (previously CyaSSL)[20] Yes Yes Yes
@nodertc/dtls [21][22] No Yes
java-dtls[23] Yes Yes
pion/dtls[24] (Go) No Yes
californium/scandium[25] (Java) No Yes
SNF4J[26] (Java) Yes Yes
Implementation DTLS 1.0 DTLS 1.2 DTLS 1.3

Applications

  • Cisco AnyConnect VPN Client uses TLS and invented DTLS-based VPN.[27]
  • OpenConnect is an open source AnyConnect-compatible client and ocserv server that supports (D)TLS.[28]
  • Cisco InterCloud Fabric uses DTLS to form a tunnel between private and public/provider compute environments.[29]
  • Cato Networks utilizes DTLS v1.2 for the underlay tunnel used by both the Cato Socket and Cato ZTNA (formerly SDP) client when forming tunnels to the Cato POPs [30] and when forming off-cloud tunnels between Cato sockets.[31]
  • ZScaler tunnel 2.0 for ZScaler Internet Access (ZIA) uses DTLS for tunneling. ZScaler Private Access (ZPA) does not support DTLS [32]
  • F5 Networks Edge VPN Client uses TLS and DTLS.[33]
  • Fortinet's SSL VPN[34] and Array Networks SSL VPN[35] also use DTLS for VPN tunneling.
  • Citrix Systems NetScaler uses DTLS to secure UDP.[36]
  • Web browsers: Google Chrome, Opera and Firefox support DTLS-SRTP[37] for WebRTC. Firefox 86 and onward does not support DTLS 1.0.[38]
  • Remote Desktop Protocol 8.0 and onwards.

Vulnerabilities

In February 2013 two researchers from Royal Holloway, University of London discovered a timing attack[39] which allowed them to recover (parts of the) plaintext from a DTLS connection using the OpenSSL or GnuTLS implementation of DTLS when Cipher Block Chaining mode encryption was used.

See also

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References

Template:Reflist

External links

  • Script error: No such module "citation/CS1".
  • Script error: No such module "citation/CS1".
  • Script error: No such module "citation/CS1".
  • Script error: No such module "citation/CS1". Skip to 1:07:14.
  • Robin Seggelmann's Sample Code: echo, character generator, and discard client/servers.
  • The Illustrated DTLS Connection

Template:SSL/TLS Template:VPN

  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "citation/CS1".
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  5. ↑ Script error: No such module "citation/CS1".
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ a b Script error: No such module "citation/CS1".
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  10. ↑ Script error: No such module "citation/CS1".
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  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ a b Script error: No such module "citation/CS1".
  16. ↑ Script error: No such module "citation/CS1".
  17. ↑ Script error: No such module "citation/CS1".
  18. ↑ Script error: No such module "citation/CS1".
  19. ↑ Script error: No such module "citation/CS1".
  20. ↑ Script error: No such module "citation/CS1".
  21. ↑ Script error: No such module "citation/CS1".
  22. ↑ Script error: No such module "citation/CS1".
  23. ↑ Script error: No such module "citation/CS1".
  24. ↑ Script error: No such module "citation/CS1".
  25. ↑ Script error: No such module "citation/CS1".
  26. ↑ Script error: No such module "citation/CS1".
  27. ↑ Script error: No such module "citation/CS1".
  28. ↑ Script error: No such module "citation/CS1".
  29. ↑ Script error: No such module "citation/CS1".
  30. ↑ Script error: No such module "citation/CS1".
  31. ↑ Script error: No such module "citation/CS1".
  32. ↑ Script error: No such module "citation/CS1".
  33. ↑ Script error: No such module "citation/CS1".
  34. ↑ Script error: No such module "citation/CS1".
  35. ↑ Script error: No such module "citation/CS1".
  36. ↑ Script error: No such module "citation/CS1".
  37. ↑ Script error: No such module "citation/CS1".
  38. ↑ Script error: No such module "citation/CS1".
  39. ↑ Script error: No such module "citation/CS1".
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