Cited in: RFC 2521
5 RFCs mentioned in the text of RFC 2521 (ICMP Security Failures Messages)
| RFC | Title | Status | Date |
|---|---|---|---|
| 792 | Internet Control Message Protocol | Internet Standard | September 1981 |
| 1122 | Requirements for Internet Hosts - Communication Layers | Internet Standard | October 1989 |
| 1700 | Assigned Numbers | Historic | October 1994 |
| 1812 | Requirements for IP Version 4 Routers | Proposed Standard | June 1995 |
| 1825 | Security Architecture for the Internet Protocol | Proposed Standard | August 1995 |