Hi Clyde,

Thank you for responding to my comments. I am OK with all of your responses.


On 19/02/18 13:02, Clyde Wildes (cwildes) wrote:

Thanks for your review. My answers are inline as [clw1].

On 2/18/18, 6:31 AM, "Yaron Sheffer" <yaronf.i...@gmail.com> wrote:

     Reviewer: Yaron Sheffer
     Review result: Has Issues
General Comments * The semantics of pattern matching is not clear: "and/or the message text" -
     are there cases where you only match the text but not the 
facility/severity? *
[clw1] Yes. There are three cases: 1. Match on facility/severity; 2. Match on the regex pattern; 3. Match on both facility/severity and the regex pattern.

     It's very confusing to specify rollover in minutes, but retention in hours.
     People are bound to get this one wrong.

[clw1] I will change the retention to minutes unless others object.

     * Interface selection: the feature
     makes sense, but I think the description is incorrect. "This leaf sets the
     source interface to be used to send messages to the remote syslog server. 
     not set, messages sent to a remote syslog server will contain the IP 
address of
     the interface the syslog message uses to exit the network element". AFAIK 
     source IP will always correspond to the interface, but this feature allows 
     to select a particular one.

[clw1] You are correct. I will modify the description to make this clearer. How 

"This leaf sets the source interface to be used to send messages to the remote 
syslog server. If
not set, messages can be sent on any interface."

     * Usage examples: the second example lists a
     specific IPv6 address, but the Yang snippet shows a domain name.

[clw1] Thanks for catching this error. I will fix this in the next revision.

     * A generic
     question (I am new to the Yang ecosystem): I understand most implementers 
     use this module from
     - is this the expectation? If so, why not add a link from the RFC into the
     repo, to make it easier for people to find?

[clw1] It is standard practice to include the model in the RFC AFAIK. I have 
not seen github links published in any other RFCs.
Security Comments * I think almost all writable data nodes here are sensitive, because a network
     attacker's first move is to block any logging on the host, and many of the 
     nodes here can be used for this purpose.

[clw1] I will reword the security section to include all writeable nodes as 

     * Re: readable data nodes, I'm not
     sure which are sensitive, and the document should give an example or two 
     than just say "some". Otherwise the security advice is not actionable. One
     example: "remote" sections leak information about other hosts in the 

[clw1] This text was lifted from another model. I will review the readable 
nodes and update.

     * Write operations... can have a negative effect on network operations. - 
I would
     add "and on network security", because logs are often used to detect 

[clw1] I will add this phrase.

     * Also add an advice, similar to the one on "pattern match", that the
     private key used for signing log messages MUST NOT be used for any other
     purpose, and that the implementation of this data node must ensure this
     property (I'm not sure how). The rationale: if the TLS private key is 
used, for
     example, this could result in a signing oracle for TLS and eventually a 

[clw1] I will add this advice.



netmod mailing list

Reply via email to