Re: Minimum TTL?

2018-02-13 Thread Reindl Harald
Am 12.02.2018 um 20:36 schrieb wbr...@e1b.org: From: "Reindl Harald" To: bind-users@lists.isc.org the ISP has no business to touch any package bewteen source and me because he can't know the implications - he even must not know about them because it#s not his business And yet they do (Su

Re: Minimum TTL?

2018-02-13 Thread Reindl Harald
Am 10.02.2018 um 05:11 schrieb John Levine: But to answer your question, off-hand, I'd say that any TTL under 60s is = suspicious and any TTL under 10s is almost certainly intentionally = abusive. I hope you're not planning to do much spam filtering i do for years with a min-ttl of 90 secod

Re: Minimum TTL?

2018-02-12 Thread wbrown
From: "Reindl Harald" > To: bind-users@lists.isc.org > the ISP has no business to touch any package bewteen source and me > because he can't know the implications - he even must not know about > them because it#s not his business And yet they do (Supercookies?), and sell that data to any and a

Re: Minimum TTL?

2018-02-10 Thread @lbutlr
On 2018-02-10 (12:15 MST), Barry Margolin wrote: > > Just because you have the right to do something doesn't mean it's a > reasonable thing to do. No one has made an argument that would imply this is not reasonable. > And if you're offering a service, you have responsibilities to your customer

Re: Minimum TTL?

2018-02-10 Thread Grant Taylor via bind-users
On 02/10/2018 12:15 PM, Barry Margolin wrote: Just because you have the right to do something doesn't mean it's a reasonable thing to do. I never meant to imply that it was the reasonable thing to do. I meant to imply that it is my choice how I run my servers. And if you're offering a service

Re: Minimum TTL?

2018-02-10 Thread Matus UHLAR - fantomas
But to answer your question, off-hand, I'd say that any TTL under 60s is = suspicious and any TTL under 10s is almost certainly intentionally = abusive. On 09.02.18 23:11, John Levine wrote: I hope you're not planning to do much spam filtering. On Sat, Feb 10, 2018 at 2:42 PM, Matus UHLAR -

Re: Minimum TTL?

2018-02-10 Thread Warren Kumari
Ok, so I've never used forwarders (actually, that's not strictly true; I've used them twice, but it was to work around weird issues, and I felt dirty), but couldn't increasing the TTL cause stupid configuration issues to become immortal RRs? I've seen a number of instances where people who *do* fo

Re: Minimum TTL?

2018-02-10 Thread John Levine
In article you write: >The target, instead of very quickly rejecting the spam because of the = >lack of a domain or the lack of DNS, instead has to deal with thousands = >of different IPs. That's not how spam filters work. They do filtering based on the IP address sending the spam and maybe the

Re: Minimum TTL?

2018-02-10 Thread Barry Margolin
In article , Grant Taylor wrote: > On 02/09/2018 09:37 AM, Barry Margolin wrote: > > As long as you understand the implications of what you're doing? > > I don't think my level of understanding has any impact of my ability to > override what the zone publisher sets the desired TTL (or any valu

Re: Minimum TTL?

2018-02-10 Thread @lbutlr
On 2018-02-09 (21:11 MST), John Levine wrote: > > In article you write: >> For the record, the issue is not RBLs or legitimate domains, it is = >> spammer scum that set super-low DNS because they are shotgunning spam = >> from a a vast botnet and they want to have maximal impact, so you get a =

Re: Minimum TTL?

2018-02-10 Thread Matus UHLAR - fantomas
But to answer your question, off-hand, I'd say that any TTL under 60s is = suspicious and any TTL under 10s is almost certainly intentionally = abusive. On 09.02.18 23:11, John Levine wrote: I hope you're not planning to do much spam filtering. do you have any evidence where enforcing a 5s mi

Re: Minimum TTL?

2018-02-09 Thread John Levine
In article you write: >For the record, the issue is not RBLs or legitimate domains, it is = >spammer scum that set super-low DNS because they are shotgunning spam = >from a a vast botnet and they want to have maximal impact, so you get a = >different IP for every spam they send. It is a way of try

Re: Minimum TTL?

2018-02-09 Thread Grant Taylor via bind-users
On 02/09/2018 05:26 PM, @lbutlr wrote: But to answer your question, off-hand, I'd say that any TTL under 60s is suspicious and any TTL under 10s is almost certainly intentionally abusive. I thought there was a lower recommended boundary, particularly to detect and avoid things like fast flux.

Re: Minimum TTL?

2018-02-09 Thread @lbutlr
On 2018-02-08 (08:51 MST), Mukund Sivaraman wrote: > > Also, just for argument's sake, one user wants to extend TTLs to > 5s. Another wants 60s TTLs. What is OK and what is going too far? For the record, the issue is not RBLs or legitimate domains, it is spammer scum that set super-low DNS bec

Re: Minimum TTL?

2018-02-09 Thread @lbutlr
On 2018-02-08 (03:10 MST), Michelle Konzack wrote: > > Hi, > > Am 2018-02-08 hackte LuKreme in die Tasten: >> Is it possible to tell bind to ignore very short TTLs and enforce >> a...say... 5 second minimum TTL? > > VERY SHORT TTL? YEs. > 5 sec minimum? Yes. > What Du you mean with ignorin

Re: Minimum TTL?

2018-02-09 Thread Grant Taylor via bind-users
On 02/09/2018 09:37 AM, Barry Margolin wrote: As long as you understand the implications of what you're doing? I don't think my level of understanding has any impact of my ability to override what the zone publisher sets the desired TTL (or any value) to be. I have the right to run my networ

Re: Minimum TTL?

2018-02-09 Thread John Levine
In article you write: >As long as you understand the implications of what you're doing? > >The zone owner may be using short TTLs to implement load balancing >and/or quick failover. If you extend the TTLs, your users may experience >poor performance when they try to go to these sites using out-o

Re: Minimum TTL?

2018-02-09 Thread Reindl Harald
Am 09.02.2018 um 17:45 schrieb Barry Margolin: In article , Reindl Harald wrote: As long as you understand the implications of what you're doing? The zone owner may be using short TTLs to implement load balancing and/or quick failover. If you extend the TTLs, your users may experience poor

Re: Minimum TTL?

2018-02-09 Thread Reindl Harald
Am 09.02.2018 um 17:45 schrieb Barry Margolin: In article , Reindl Harald wrote: As long as you understand the implications of what you're doing? The zone owner may be using short TTLs to implement load balancing and/or quick failover. If you extend the TTLs, your users may experience poo

Re: Minimum TTL?

2018-02-09 Thread Barry Margolin
In article , Reindl Harald wrote: > > As long as you understand the implications of what you're doing? > > > > The zone owner may be using short TTLs to implement load balancing > > and/or quick failover. If you extend the TTLs, your users may experience > > poor performance when they try to go

Re: Minimum TTL?

2018-02-09 Thread Reindl Harald
Am 09.02.2018 um 17:37 schrieb Barry Margolin: In article , Grant Taylor wrote: On 02/08/2018 08:51 AM, Mukund Sivaraman wrote: Also, just for argument's sake, one user wants to extend TTLs to 5s. Another wants 60s TTLs. What is OK and what is going too far? I think what is "OK" is up t

Re: Minimum TTL?

2018-02-09 Thread Barry Margolin
In article , Grant Taylor wrote: > On 02/08/2018 08:51 AM, Mukund Sivaraman wrote: > > Also, just for argument's sake, one user wants to extend TTLs to > > 5s. Another wants 60s TTLs. What is OK and what is going too far? > > I think what is "OK" is up to each administrator. > > Obviously the

Re: Minimum TTL?

2018-02-09 Thread Reindl Harald
Am 09.02.2018 um 13:15 schrieb Tony Finch: Reindl Harald wrote: CISCO router with "DNS-ALG" Oh god, never turn on PIX/ASA protocol fuxup features well, i did not know that the ISP ships that crap with the feature enabled and even if i did not imagine that it takes a zone-transfer on the

Re: Minimum TTL?

2018-02-09 Thread Warren Kumari
Leave off the "protocol fixup feature", its cleaner :-P On Fri, Feb 9, 2018 at 7:15 AM, Tony Finch wrote: > Reindl Harald wrote: >> >> CISCO router with "DNS-ALG" > > Oh god, never turn on PIX/ASA protocol fuxup features. > > Tony. > -- > f.anthony.n.finchhttp://dotat.at/ - I xn--zr8h

Re: Minimum TTL?

2018-02-09 Thread Tony Finch
Reindl Harald wrote: > > CISCO router with "DNS-ALG" Oh god, never turn on PIX/ASA protocol fuxup features. Tony. -- f.anthony.n.finchhttp://dotat.at/ - I xn--zr8h punycode Malin: West 5 or 6, backing south 7 to severe gale 9 for a time. Very rough or high. Rain or wintry showers. Good, o

Re: Minimum TTL?

2018-02-09 Thread Matus UHLAR - fantomas
Am 09.02.2018 um 07:02 schrieb sth...@nethelp.no: Yesterday I measured, on our busiest resolvers, the amount of replies with TTL=0 the resolvers received (from the authoritative servers). Turns out we receive around 2.3 percent replies with TTL=0. This is a percentage I can live with, and I see n

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 09.02.2018 um 07:02 schrieb sth...@nethelp.no: I think what is "OK" is up to each administrator. Obviously the zone administrators have decided that they want people to use the 2s TTL. That being said, it is up to each individual recursive server operator if they want to honor what the zon

Re: Minimum TTL?

2018-02-08 Thread sthaug
> I think what is "OK" is up to each administrator. > > Obviously the zone administrators have decided that they want people to > use the 2s TTL. > > That being said, it is up to each individual recursive server operator > if they want to honor what the zone administrators have published, or if

Re: Minimum TTL?

2018-02-08 Thread Bob Harold
On Thu, Feb 8, 2018 at 4:34 PM, Grant Taylor via bind-users < bind-users@lists.isc.org> wrote: > On 02/08/2018 08:51 AM, Mukund Sivaraman wrote: > >> Also, just for argument's sake, one user wants to extend TTLs to 5s. >> Another wants 60s TTLs. What is OK and what is going too far? >> > > I think

Re: Minimum TTL?

2018-02-08 Thread Grant Taylor via bind-users
On 02/08/2018 08:51 AM, Mukund Sivaraman wrote: Also, just for argument's sake, one user wants to extend TTLs to 5s. Another wants 60s TTLs. What is OK and what is going too far? I think what is "OK" is up to each administrator. Obviously the zone administrators have decided that they want peo

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 17:07 schrieb Tony Finch: Reindl Harald wrote: yes, you are free to decide that named don't need to support the users wish of such a feature. but the result is that the user stops to use named at all on a inbound-mailserver and is done Or you could use patched versions fro

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 17:10 schrieb Mukund Sivaraman: On Thu, Feb 08, 2018 at 05:05:51PM +0100, Reindl Harald wrote: I doubt the zone owner is forcing you to use their zone. You can nix fetches to it. If you want the zone data, then follow what the zone owner requires. does not matter It matter

Re: Minimum TTL?

2018-02-08 Thread Mukund Sivaraman
On Thu, Feb 08, 2018 at 05:05:51PM +0100, Reindl Harald wrote: > > I doubt the zone owner is forcing you to use their zone. You can nix > > fetches to it. If you want the zone data, then follow what the zone > > owner requires. > > does not matter It matters to us. Mukund ___

Re: Minimum TTL?

2018-02-08 Thread Matus UHLAR - fantomas
Reindl Harald wrote: yes, you are free to decide that named don't need to support the users wish of such a feature. but the result is that the user stops to use named at all on a inbound-mailserver and is done On 08.02.18 16:07, Tony Finch wrote: Or you could use patched versions from FreeBS

Re: Minimum TTL?

2018-02-08 Thread Tony Finch
Barry Margolin wrote: > There are some servers that will avoid expiring records if the auth > servers stop responding, as a fail-safe mechanism. For instance, BIND 9.12 - https://www.isc.org/blogs/bind-9-12-almost-ready/ Tony. -- f.anthony.n.finchhttp://dotat.at/ - I xn--zr8h punycode Ir

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 17:03 schrieb Barry Margolin: In article , Reindl Harald wrote: frankly, even *if* i pay for the service i would call it a good citizen to produce less load and the "minimum-ttl" also reduces load from other RBL's without any restriction If the service provider is worrie

Re: Minimum TTL?

2018-02-08 Thread Tony Finch
Reindl Harald wrote: > > yes, you are free to decide that named don't need to support the users wish of > such a feature. but the result is that the user stops to use named at all on a > inbound-mailserver and is done Or you could use patched versions from FreeBSD or Debian ... https://svnweb.fr

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 16:51 schrieb Mukund Sivaraman: On Thu, Feb 08, 2018 at 04:39:36PM +0100, Reindl Harald wrote: Am 08.02.2018 um 16:34 schrieb Mukund Sivaraman: If the RRset wants a TTL of N seconds, then that is the authoritative instruction from the owner of the zone about how the data shou

Re: Minimum TTL?

2018-02-08 Thread Barry Margolin
In article , Reindl Harald wrote: > frankly, even *if* i pay for the service i would call it a good citizen > to produce less load and the "minimum-ttl" also reduces load from other > RBL's without any restriction If the service provider is worried about load, they should increase their TTL

Re: Minimum TTL?

2018-02-08 Thread Mukund Sivaraman
On Thu, Feb 08, 2018 at 04:39:36PM +0100, Reindl Harald wrote: > > > Am 08.02.2018 um 16:34 schrieb Mukund Sivaraman: > > On Thu, Feb 08, 2018 at 01:30:04PM +0200, Michelle Konzack wrote: > > > Hello Harald, > > > Am 2018-02-08 hackte Reindl Harald in die Tasten: > > > > you miss the topic > > >

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 16:39 schrieb Reindl Harald: Am 08.02.2018 um 16:34 schrieb Mukund Sivaraman: On Thu, Feb 08, 2018 at 01:30:04PM +0200, Michelle Konzack wrote: Hello Harald, Am 2018-02-08 hackte Reindl Harald in die Tasten: you miss the topic many DNSBL's have a very short TTL and at the sa

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 16:34 schrieb Mukund Sivaraman: On Thu, Feb 08, 2018 at 01:30:04PM +0200, Michelle Konzack wrote: Hello Harald, Am 2018-02-08 hackte Reindl Harald in die Tasten: you miss the topic many DNSBL's have a very short TTL and at the same time a limit of queries froma single IP unt

Re: Minimum TTL?

2018-02-08 Thread Mukund Sivaraman
On Thu, Feb 08, 2018 at 01:30:04PM +0200, Michelle Konzack wrote: > Hello Harald, > Am 2018-02-08 hackte Reindl Harald in die Tasten: > > you miss the topic > > > > many DNSBL's have a very short TTL and at the same time a limit of > > queries froma single IP until you need to pay for the service >

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 16:16 schrieb John Levine: In article you write: you miss the topic many DNSBL's have a very short TTL and at the same time a limit of queries from a single IP until you need to pay for the service This doesn't sound like a technical problem. Is there some reason you shoul

Re: Minimum TTL?

2018-02-08 Thread John Levine
In article you write: >you miss the topic > >many DNSBL's have a very short TTL and at the same time a limit of >queries froma single IP until you need to pay for the service This doesn't sound like a technical problem. Is there some reason you shouldn't pay for the service you're using? ___

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 12:30 schrieb Michelle Konzack: Hello Harald, Am 2018-02-08 hackte Reindl Harald in die Tasten: you miss the topic many DNSBL's have a very short TTL and at the same time a limit of queries froma single IP until you need to pay for the service so if you have a inbound MX and

Re: Minimum TTL?

2018-02-08 Thread Michelle Konzack
Hello Harald, Am 2018-02-08 hackte Reindl Harald in die Tasten: > you miss the topic > > many DNSBL's have a very short TTL and at the same time a limit of > queries froma single IP until you need to pay for the service > > so if you have a inbound MX and the RBL has 2 seconds TTL and a botnet > is

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 11:10 schrieb Michelle Konzack: Am 2018-02-08 hackte LuKreme in die Tasten: Is it possible to tell bind to ignore very short TTLs and enforce a...say... 5 second minimum TTL? VERY SHORT TTL? 5 sec minimum? What Du you mean with ignoring? It is you YOU have to configure Bin

Re: Minimum TTL?

2018-02-08 Thread Michelle Konzack
Thankyou for clarification... Am DATE hackte AUTHOR in die Tasten: Karol Augustin > On 2018-02-08 10:10, Michelle Konzack wrote: >> Hi, >> >> Am 2018-02-08 hackte LuKreme in die Tasten: >>> Is it possible to tell bind to ignore very short TTLs and enforce >>> a...say... 5 second minimum TTL? >> >>

Re: Minimum TTL?

2018-02-08 Thread Karol Augustin
On 2018-02-08 10:10, Michelle Konzack wrote: > Hi, > > Am 2018-02-08 hackte LuKreme in die Tasten: >> Is it possible to tell bind to ignore very short TTLs and enforce >> a...say... 5 second minimum TTL? > > VERY SHORT TTL? > > 5 sec minimum? > > What Du you mean with ignoring? > It is you YOU

Re: Minimum TTL?

2018-02-08 Thread Michelle Konzack
Hi, Am 2018-02-08 hackte LuKreme in die Tasten: > Is it possible to tell bind to ignore very short TTLs and enforce > a...say... 5 second minimum TTL? VERY SHORT TTL? 5 sec minimum? What Du you mean with ignoring? It is you YOU have to configure Bind9 correctly to longer TTLs. If the NS Entry

Re: Minimum TTL?

2018-02-08 Thread Reindl Harald
Am 08.02.2018 um 09:52 schrieb LuKreme: Is it possible to tell bind to ignore very short TTLs and enforce a...say... 5 second minimum TTL? no, such a feature was refused because it violates RFC's (questionable justification for a local decision not enbaled by default) and hence on a inboun