Questions tagged [rfc]
A Request for Comments (RFC) is a publication of the Internet Engineering Task Force (IETF) and the Internet Society, the principal technical development and standards-setting bodies for the Internet.
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Abuse of Abuse reporting system / Feedback loop by spfbl.net
We are getting below abuse emails from Abuse reporting system / Feedback loop by spfbl.net
Can someone explain how are these even valid Abuse emails in any sense at all, because they are clearly being ...
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DHCP renewal can't go through because DHCP server is down
To my experience, if a DHCP client tries to renew its lease, but the DHCP server is down, and after the lease time is over, there are two possible scenarios:
The client keeps the IP
The client goes ...
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is "GET /" a valid HTTP request?
I noticed that sending GET / (+CRLF) to some webservers (e.g. from a well-known search provider) results in a HTTP/1.0 200 OK message. Other webserver respond with a HTTP/1.0 400 error.
To my ...
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Is it legal for a DHCP relay agent to relay RENEWAL requests that were directly unicast to the "Server identifier" server?
I'm observing the following in a packet capture.
Client -> Broadcast : DHCP Request
Relay -> Client : DHCP Ack (Option 54 == Server)
... After T1 expires ...
Client -> Server Identifier ...
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RFC 3074 DHCP Load Balancing STID vs RFC 2131 DHCP xid
Section 2.2 of RFC 3074 defines a Service Transaction ID (STID) as:
An attribute of the individual client requests used for load-balancing.
However, section 2 of RFC 2131 defines the xid field of a ...
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Which ICMP types (v4/v6) should not be blocked?
I have made a lot of research into this and have found that some references contradict each other.
IPV6
For example RFC4890 says the following types should be allowed for optimal functionality:
Type ...
- 1,675
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syslog-ng: how to configure sending RFC5424 messages with octet-counting framing
Please don't bother reading this question. syslog-ng is already set up to send RFC5424 messages with octet-counting framing by default. I was confused by the behaviour of another component. This ...
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Doubts about DKIM verification (RFC6376)
Good morning,
https://www.rfc-editor.org/rfc/rfc6376#section-5 reads:
"Survivability of signatures after transit is not guaranteed, and
signatures can fail to verify through no fault of the ...
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Why not shorten a single :0000: field in IPv6
rfc5952, section 4.2.2 "Handling One 16-Bit 0 Field" goes:
The symbol "::" must not be used to shorten just one 16-bit 0 field. For example, the representation
2001:db8:0:1:1:1:1:...
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How can DHCPv6 server allocate fixed IPv6 addresses to clients if it's not allowed to interpret DUID?
According to RFC3315:
Each DHCP client and server has a DUID. DHCP servers use DUIDs to
identify clients for the selection of configuration parameters and in
the association of IAs with clients. DHCP ...
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Do glue records/child hosts override DNS wildcard entries or A records at the domain names DNS servers records?
Do glue records/child hosts override DNS wildcard entries or A records at the domain names DNS servers records?
example:
ns1.example.com = 1.1.1.1 at registrar DNS glue /child host
ns1.example.com = 2....
- 109
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Two way handshake for WHOIS protocol? RFC 3912
From RFC 3912:
3. Protocol Example
If one places a request of the WHOIS server located at whois.nic.mil
for information about "Smith", the packets on the wire will look
like:
client ...
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IPv6 address text notation with prefix: inside or outside square brackets?
I'm skimming through some IPv6 related RFCs. Some claim that a prefix should be written outside of the square brackets, whereas others have it tacked on to the address directly.
Specifically, RFC4291, ...
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DHCPv6 (RFC 8415) - What are reasonable initial values for time intervals T1/T2?
As described in Section 18.2. - Client Behavior of DHCP - RFC 8415 a client uses the Solicit message to discover DHCP servers configured to assign leases or return other configuration parameters on ...
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Where to find symbol definitions for RFC protocol flow diagram?
I am reading RFC5077, and bumped into following diagram:
ClientHello
(empty SessionTicket extension)-------->
ServerHello
...
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