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H110Hawk posted:Now do IP6. I remember nothing on IPv6 except FE80::/10 and relearn what I need to do whenever I interact with it, which is rare since I don't have to interact with it often. Even though it works and is actually easier than IPv4 once you get the hang of it, I refuse to bring it into the internal networks basically anywhere because change is bad and scary for most people who do not want to learn anything new ever.
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Feb 10, 2020 19:20
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Nuclearmonkee posted:I remember nothing on IPv6 except FE80::/10 and relearn what I need to do whenever I interact with it, which is rare since I don't have to interact with it often. or you have some devices/software that just throws a fit when it sniffs IPv6
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Feb 10, 2020 19:26
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Nuclearmonkee posted:I remember nothing on IPv6 except FE80::/10 and relearn what I need to do whenever I interact with it, which is rare since I don't have to interact with it often. Just slap an RA on your gateway and see where the day takes you. I did this once. Thankfully my old employer wisely stopped letting me login to the routers.
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Feb 10, 2020 19:26
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The moment that ipv6 becomes mandatory is the moment I leave my tech career to live off the grid in a cabin with bears.
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Feb 10, 2020 19:32
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At this point I don't think I am ever going to use IPv6 in a business setting before I retire. At least in my industry I've seen absolutely no movement towards supporting it or even discussion of it. At least for internal use. Out of the 9 ISPs we have, Comcast is the only one that officially supports it.
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Feb 10, 2020 19:36
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H110Hawk posted:Just slap an RA on your gateway and see where the day takes you. lol like at random just turned it on or was this a thing that was supposed to be turned on the only place i ever worked with it was with a thing in india Nuclearmonkee fucked around with this message at 19:46 on Feb 10, 2020 |
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Feb 10, 2020 19:43
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I've probably got another 25 years of work ahead of me. Hopefully I can keep dodging IPv6 until I retire. God willing I'll get there.
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Feb 10, 2020 20:50
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Nuclearmonkee posted:lol like at random just turned it on or was this a thing that was supposed to be turned on Pretend I thought I was putting it on a specific vlan but had no idea what I was doing, plus it was Cisco IOS over 10 years ago which was pretty hilarious when it comes to things like that. Thousands of servers suddenly had ip6. It was amazing.
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Feb 10, 2020 20:58
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I got presented a "secure" azure environment where i saw some Any/any - azure regional storage service on a security group. Turns out that despite all other protections, allowing a regional storage service also allowed you to access public storage accounts located in that region. This tenant handled PHI.
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Feb 10, 2020 21:00
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CLAM DOWN posted:The moment that ipv6 becomes mandatory is the moment I leave my tech career to live off the grid in a cabin with bears. I'm friends with the president of the local FAB chapter, I'm sure I could get you in touch if you're looking for some bears to hang out with in your cabin.
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Feb 10, 2020 21:39
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BaseballPCHiker posted:I've probably got another 25 years of work ahead of me. Hopefully I can keep dodging IPv6 until I retire. God willing I'll get there. Pretty sure 'we've run out of IP4 addresses and facing global internet meltdown' at least 4 times so far.
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Feb 10, 2020 22:06
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32 bits ought to be enough for everybody *allocates 224.0.0.0/4 to multicast* *allocates 240.0.0.0/4 to future use but can never be used* Methanar fucked around with this message at 22:11 on Feb 10, 2020 |
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Feb 10, 2020 22:06
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How does ip6 addressing work out from a network engineering perspective? Do all devices virtual and otherwise just generate an IP from thin air? Do you just assign them an ip like we'd assign ip4 address except its in hex? How do you classify the difference between say, My home network(x.x.x.x/z) and my office network(y.y.y.y/z)? I guess what I'm actually asking, is there a dummies guide to the care and feeding of an IP6 network?
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Feb 10, 2020 22:22
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I'm a little distanced from my networking days, but in general IPv6 is structured so that all LANs have 64 bits of network prefix. I think ISPs that support v6 hand out /48s? This would give you 65536 LANs available. As for individual devices, DHCPv6 is a thing. Obviously this works like you would expect in concept. Not using DHCP, devices will tend to automatically generate an IP address using SLAAC (stateless address autoconfig). This is basically the self-generated IPv6 address you see on every interface that has IPv6 enabled (these are the fe80::/64 addresses you can see in Windows). The short of this is the devices generate an IP "from thin air", like you said, and then conflict resolution happens by the router once plugged into a network. There is a strong chance some of this is wrong, please correct me if so. I think covers what you asked though. Oh resources. I used to have a book for this, I'll see if I can hunt down the site or name for you. e: Clarification. Devices will always generate a SLAAC address, the question is whether they will use it or not (ie: are you running DHCP)
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Feb 10, 2020 22:39
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The two magic words are Neighbour Discovery Protocol (NDP) (for addresses) and DHCPv6 (for other information). Router Advertisements (part of NDP) are basically announcements "here be router, here be subnet, pick an address, any address, and send your traffic here" whereas DHCPv6 is fairly close to its v4 version.
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Feb 10, 2020 22:41
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The part about the ip6 stick dragging that cracks me up is configuration is so much easier if you have any amount of dns self registration and service discovery. And like, all of our mobile phones in the USA, plus Set Top Boxes for cable TV haven't been using it for awhile now. Even if your retail internet doesn't come with IP6 support, it's being routed on your network if you have a connected STB.
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Feb 10, 2020 22:44
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H110Hawk posted:The part about the ip6 stick dragging that cracks me up is configuration is so much easier if you have any amount of dns self registration and service discovery. And like, all of our mobile phones in the USA, plus Set Top Boxes for cable TV haven't been using it for awhile now. Even if your retail internet doesn't come with IP6 support, it's being routed on your network if you have a connected STB. Also that if it were implemented in corporate networks you would no longer need NAT and have to deal with thinking about NAT, and just use straight routing. (Well, y'know, with firewalls inspecting traffic, but yeah).
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Feb 10, 2020 23:00
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Super Soaker Party! posted:Also that if it were implemented in corporate networks you would no longer need NAT and have to deal with thinking about NAT, and just use straight routing. (Well, y'know, with firewalls inspecting traffic, but yeah). This is the part that I really want to see. No more NAT! As a side benefit IPv6 would really force the "have a non-poo poo DNS service" that most companies can't seem to manage.
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Feb 10, 2020 23:04
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Were interviewing for a mid-level desktop support position and I get to be part of it since they will hopefully take over day to day firewall rules and support our very basic on-prem networks. Its painful how bad people whiff on softball questions. Havent even had the chance to ask a hard question. Asking what is the minimum amount of info a DHCP server needs to provide a client in order to browse the web draws a blank.
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Feb 10, 2020 23:18
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I'd have a hard time answering that. Haven't had to think about it in 15 years. Uhh DHCP gives IP and the web worky worky.
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Feb 10, 2020 23:20
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I asked a range of questions that I thought were easy. I asked... How to lookup the routing table on a mac They all have python experience so I asked what imports you declare to print system time Differences between 2.4 and 5ghz wireless (any difference) Difference between trunk and access port Configuring a cronjob to run every 3 minutes
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Feb 10, 2020 23:27
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I hosed that one up back in 2016. IP, subnet mask, gateway, I think there's one more thing but gently caress it, it's my Saturday.
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Feb 10, 2020 23:28
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22 Eargesplitten posted:I hosed that one up back in 2016. IP, subnet mask, gateway, I think there's one more thing but gently caress it, it's my Saturday. DNS
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Feb 10, 2020 23:37
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Huh, what do you know, it really is always DNS. When I flubbed it last time I forgot gateway.
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Feb 10, 2020 23:38
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Sepist posted:I asked a range of questions that I thought were easy. I asked... I'd flub these two. The first is because I'm lazy and would use the GUI, the second is because CloudWatch events are the only thing I've been using for a few years now and their syntax is a little off.
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Feb 10, 2020 23:40
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Sepist posted:I asked a range of questions that I thought were easy. I asked...
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Feb 10, 2020 23:46
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Sepist posted:I asked a range of questions that I thought were easy. I asked... I'd flub this. I've configured cronjobs, but I've always used an online calculator because I don't do it often. 2.4 and 5 I'd probably stumble about how the difference in wavelength allows for one of them to travel longer distances or something. The other three I'd basically say "No clue off hand, I'd probably just google that"
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Feb 10, 2020 23:48
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I couldn't answer the cronjob one, otherwise all the questions seem fine and appropriate for a mid-level generalist. e: Defenestrategy posted:2.4 and 5 I'd probably stumble about how the difference in wavelength allows for one of them to travel longer distances or something. the super basic answer is that 5 ghz is a shorter wavelength, and as a result allows for higher bandwidth at the cost of shorter range and bigger issues with interference. 2.4ghz has a longer wavelength, for lower bandwidth and longer range. The Fool fucked around with this message at 23:51 on Feb 10, 2020 |
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Feb 10, 2020 23:49
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I wasnt expecting them to know them all, just trying to figure out a range. But if your range is 0..
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Feb 10, 2020 23:49
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Sepist posted:I asked a range of questions that I thought were easy. I asked... Did all of these get a miss? From the same person or in multiple instances? I'd think you could expect at least 3/5.
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Feb 10, 2020 23:51
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IPv6 is good and it's the future but there still doesn't seem to be an agreed-upon way to implement the really basic 'fail between WAN1 and WAN2' that is second nature when NAT is being used with IPv4. I think there were some moves to just advertise multiple prefixes and gateways into a VLAN and tell the client what one was the priority but not everything supports that.
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Feb 10, 2020 23:51
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ChubbyThePhat posted:Did all of these get a miss? From the same person or in multiple instances? I'd think you could expect at least 3/5. Multiple instances all missed
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Feb 10, 2020 23:52
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Sepist posted:Multiple instances all missed When would you have to find the routing table on a mac? unless this is one of those " Didn't you know mac and linux have the same terminal commands?" kinda things.
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Feb 10, 2020 23:55
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Thanks Ants posted:IPv6 is good and it's the future but there still doesn't seem to be an agreed-upon way to implement the really basic 'fail between WAN1 and WAN2' that is second nature when NAT is being used with IPv4. I think there were some moves to just advertise multiple prefixes and gateways into a VLAN and tell the client what one was the priority but not everything supports that. If you have your own portable space this is a non-issue. I think you're inferring "without resetting everyone's connections" though. If you're OK with reconnecting everyone the rare times your internet goes out then it's also a non-issue.
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Feb 10, 2020 23:56
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Are my standards just ridiculously low here? I am not surprised that people interviewing for a desktop support position are missing all of those questions.
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Feb 10, 2020 23:57
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Defenestrategy posted:When would you have to find the routing table on a mac? unless this is one of those " Didn't you know mac and linux have the same terminal commands?" kinda things. Validating a split tunnel or full tunnel vpn is sending your routes to the tunnel interface
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Feb 10, 2020 23:58
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The cron one is */3 * * * * But use Jenkins
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Feb 11, 2020 00:00
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H110Hawk posted:If you have your own portable space this is a non-issue. I think you're inferring "without resetting everyone's connections" though. If you're OK with reconnecting everyone the rare times your internet goes out then it's also a non-issue. I'm talking about the lower end of things where people chuck a fibre provider and then a connection from their local broadband company/LTE modem into a box, PI space and eBGP isn't really an option there. I think this is why a lot of SD-WAN providers just pretend IPv6 doesn't exist either.
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Feb 11, 2020 00:02
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jaegerx posted:The cron one is */3 * * * * I'm a vim guy, Jenkins is too fancy for me
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Feb 11, 2020 00:03
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Oh one guy had windows 95 on his resume so asked him which edition of windows 95 had USB support
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Feb 11, 2020 00:06
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