Re: OT: strange network problem
On Tue, Jan 11, 2022 at 3:14 PM Ohad Levy wrote: > > > On Tue, Jan 11, 2022 at 11:26 AM Erez D wrote: > >> >> >> On Tue, Jan 11, 2022 at 9:29 AM Ohad Levy wrote: >> >>> >>> >>> On Tue, Jan 11, 2022 at 9:19 AM Erez D wrote: >>> The windows 169.25. ip is from APIPA and not from any DHCP server (ipconfig does not specify a dhcp server). to be on the safe side I verified udp port 67 is unused on my mac (via netstat, fuser and socat) what boggles me is why can't the window machine access the router and get an ip when the mac is sleeping as the AP switch is layer 2, i would susspect the switch disables the windows machin for some reason, e.g. it sees the same mac address from another port or detects abuse of somewhat from the windows eth port however i do not understand how is this related to the mac sleeping I thought the AP switch maybe defective but puting another GB switch instead causes the same results ... >>> >>> can you run tcpdump on your router? does it show the dhcp requests from >>> your windows machine? >>> >> Alas, No. I know it is sacrilege but I use a hot cable modem/router. >> I do not have hardware that can support 500Mb to be used as a linux >> firewall ... >> > openwrt :) > I'm probably getting old, in my time running openwrt required hardware to run on ;-) > > but technically, if you have a 3rd machine, you should be able to see dhcp > requests being broadcasted on layer2 > > I'll try that though i do not understand why there should be a difference if my mac is up or not ... Thanks > >> Thanks, >> Erez. >> >> why do you thing HOMEGROUP is related ? it is a higher layer protocol when the problems seems to me on layer 2 Thanks, Erez On Tue, Jan 11, 2022 at 8:36 AM wrote: > On Monday, 10 January 2022 19:30:55 IST Erez D wrote: > > I've encountered a network problem > > > > i have a mac and a win10 machine connected to a 4 port Gbit wifi6 AP > > (switch mode). > > a third eth from the AP goes to the router which is also a DHCP > server > > > > everything works well until the mac goes to sleep. > > when the mac goes to sleep, the win10 machine looses it's ip address > > which becomes a 169. address > > > > as soon as i wake the mac up, the win machine regain a valid > 10.0.0.x ip > > > > i tried to replace the AP with a 4 port switch and got same results > > > > > > any idea ? > > > > IP in the 169.254.0.0/16 range is related to bonjour protocol , it > is a link local communication. > > your windows would move to a bonjur ip in many cases but most common > that can happen if your machine has a bonjour service enabled and an > Ethernet card with dhcp that can not get an ip from the router. > > 1. Check if when the mac is running your windows machine got it's ip > from the mac and not from the router. in some cases mac can have dhcpd > running on it, if that is the case you should disable it if you do not > need > it. > 2. Check if homegroup is enabled on win10, if it is disable it (by > version 1803 it is no longer active by default, but you could have hacked > to enable it). > > > ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il >>> ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: OT: strange network problem
On Tue, Jan 11, 2022 at 11:26 AM Erez D wrote: > > > On Tue, Jan 11, 2022 at 9:29 AM Ohad Levy wrote: > >> >> >> On Tue, Jan 11, 2022 at 9:19 AM Erez D wrote: >> >>> The windows 169.25. ip is from APIPA and not from any DHCP server >>> (ipconfig does not specify a dhcp server). >>> to be on the safe side I verified udp port 67 is unused on my mac (via >>> netstat, fuser and socat) >>> >>> what boggles me is why can't the window machine access the router and >>> get an ip when the mac is sleeping >>> >>> as the AP switch is layer 2, i would susspect the switch disables the >>> windows machin for some reason, >>> e.g. it sees the same mac address from another port or detects abuse of >>> somewhat from the windows eth port >>> however i do not understand how is this related to the mac sleeping >>> >>> I thought the AP switch maybe defective but puting another GB switch >>> instead causes the same results ... >>> >> >> can you run tcpdump on your router? does it show the dhcp requests from >> your windows machine? >> > Alas, No. I know it is sacrilege but I use a hot cable modem/router. > I do not have hardware that can support 500Mb to be used as a linux > firewall ... > openwrt :) but technically, if you have a 3rd machine, you should be able to see dhcp requests being broadcasted on layer2 > > Thanks, > Erez. > > >>> why do you thing HOMEGROUP is related ? it is a higher layer protocol >>> when the problems seems to me on layer 2 >>> >>> Thanks, >>> Erez >>> >>> >>> >>> >>> On Tue, Jan 11, 2022 at 8:36 AM wrote: >>> On Monday, 10 January 2022 19:30:55 IST Erez D wrote: > I've encountered a network problem > > i have a mac and a win10 machine connected to a 4 port Gbit wifi6 AP > (switch mode). > a third eth from the AP goes to the router which is also a DHCP server > > everything works well until the mac goes to sleep. > when the mac goes to sleep, the win10 machine looses it's ip address > which becomes a 169. address > > as soon as i wake the mac up, the win machine regain a valid 10.0.0.x ip > > i tried to replace the AP with a 4 port switch and got same results > > > any idea ? > IP in the 169.254.0.0/16 range is related to bonjour protocol , it is a link local communication. your windows would move to a bonjur ip in many cases but most common that can happen if your machine has a bonjour service enabled and an Ethernet card with dhcp that can not get an ip from the router. 1. Check if when the mac is running your windows machine got it's ip from the mac and not from the router. in some cases mac can have dhcpd running on it, if that is the case you should disable it if you do not need it. 2. Check if homegroup is enabled on win10, if it is disable it (by version 1803 it is no longer active by default, but you could have hacked to enable it). ___ >>> Linux-il mailing list >>> Linux-il@cs.huji.ac.il >>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il >>> >> ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
OT: looking for a job
Hello guys and girls I apoiogize if this isn't the place for it, but I've been offline for a long time, and this seems to be the only israeli-tech-list still active in my mailbox. You are more than wellcome to redirect me to a propper channle (is LinkedIn a real thing?) As the headline says - i'm in the market for a job. Been happily doing non-tech stuff for the last few years, but with Obiquitus Omicron, here I am. So: *C.V will be sent per request, here is my general direction, both ways:* *Desired job includes mainly getting paid for being useful without catching COVID (I'm at risk if I catch it.)* I would like to do something that I think is cool, but thats really just a wish and not a demand. Anything from a short gig to a full time long term at something you teach me from scratch may be fine. *Skills*: nothing unusual: I can Bash, I can Vi. git, Apache and SQL are no strangers though may need some reminding. I can install stuff (OS's, servers, stuff) I can even uninstall stuff sometimes (; I have in my past academic programing courses which I enjoyed but never deployed on a job. I've been a linux user since the late 90's both for work and personal purposes. I have a general understanding of how the internet was said to work before street lamp posts started double as amazon-anywhere spyware hotspots (generic term, not updated on their trademarks and specks). Am I embarrasing myself right now? Probably (: But I think you get the idea. Old Knowledge, but I can and like to learn and expand. Especially if you teach well and pay well for it. I currently live in the north, I have a car and am not afraid to use it. Would rather not be obligated to be exposed to offices at all, but would sit with careful and vaccinated bunch in a not-stuffy place, with masks fully on. Maybe. Depends. Thanx for reading, thanx for linuxing, lemme know if you have something relevant. Cheers Ma'ayan. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Fork from "OT: strange network problem"
On 11/01/2022 11:26, Erez D wrote: Alas, No. I know it is sacrilege but I use a hot cable modem/router. I do not have hardware that can support 500Mb to be used as a linux firewall ... Being an Oleh Hadash who just wanted to hit the easy button six months ago, I also have the Hot modem/router. It lease a bit to be desired, e.g. I could figure out how to properly get it to use my PiHole as the DNS server on my home network (could never find the option in the software), and I also couldn't get it to just run as a modem and let me use my old German DSL modem/router (a FritzBox and another easy button moment) as the home network router (because I could at least configure that to my heart's content). So, are there suggestions/recommendations for how to reconfigure things, especially as pertains to hardware running OpenWRT or another free/libre alternative? ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il Thanks all, Fuller Mark E. Fuller, Ph.D. HaShikma 19, Apt. 24 Nesher 3681219, Israel +972 (0)53-872-6579 +49 (0)1577 1848188 +1 401-214-4266 mark.e.ful...@gmail.com mark.e.ful...@gmx.de ful...@stossrohr.net @fuller:one.ems.host https://www.stossrohr.net PGP Fingerprint: 73F1 A30C BDF4 DB4B C75F FD0F D599 E76C FFCA BF60 ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: OT: strange network problem
On Tuesday, 11 January 2022 9:18:47 IST Erez D wrote: > The windows 169.25. ip is from APIPA and not from any DHCP server (ipconfig > does not specify a dhcp server). Thank you for your enhancement, and more specific explanation. I was wrong ,it's APIPA which implement it and not the bonjour service. > to be on the safe side I verified udp port 67 is unused on my mac (via > netstat, fuser and socat) > > what boggles me is why can't the window machine access the router and get > an ip when the mac is sleeping > He may be getting the ip and routing *from* the mac itself (mac running dhcp server). > as the AP switch is layer 2, i would susspect the switch disables the > windows machin for some reason, > e.g. it sees the same mac address from another port or detects abuse of > somewhat from the windows eth port > however i do not understand how is this related to the mac sleeping > > I thought the AP switch maybe defective but puting another GB switch > instead causes the same results ... > > why do you thing HOMEGROUP is related ? it is a higher layer protocol when > the problems seems to me on layer 2 > homegroup is effectively a vpn , it's easy to make mistake there (speaking from experience) and lock yourself from the local network at home. > Thanks, > Erez > > > ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: OT: strange network problem
On Tue, Jan 11, 2022 at 9:29 AM Ohad Levy wrote: > > > On Tue, Jan 11, 2022 at 9:19 AM Erez D wrote: > >> The windows 169.25. ip is from APIPA and not from any DHCP server >> (ipconfig does not specify a dhcp server). >> to be on the safe side I verified udp port 67 is unused on my mac (via >> netstat, fuser and socat) >> >> what boggles me is why can't the window machine access the router and get >> an ip when the mac is sleeping >> >> as the AP switch is layer 2, i would susspect the switch disables the >> windows machin for some reason, >> e.g. it sees the same mac address from another port or detects abuse of >> somewhat from the windows eth port >> however i do not understand how is this related to the mac sleeping >> >> I thought the AP switch maybe defective but puting another GB switch >> instead causes the same results ... >> > > can you run tcpdump on your router? does it show the dhcp requests from > your windows machine? > Alas, No. I know it is sacrilege but I use a hot cable modem/router. I do not have hardware that can support 500Mb to be used as a linux firewall ... Thanks, Erez. >> why do you thing HOMEGROUP is related ? it is a higher layer protocol >> when the problems seems to me on layer 2 >> >> Thanks, >> Erez >> >> >> >> >> On Tue, Jan 11, 2022 at 8:36 AM wrote: >> >>> On Monday, 10 January 2022 19:30:55 IST Erez D wrote: >>> > I've encountered a network problem >>> > >>> > i have a mac and a win10 machine connected to a 4 port Gbit wifi6 AP >>> > (switch mode). >>> > a third eth from the AP goes to the router which is also a DHCP server >>> > >>> > everything works well until the mac goes to sleep. >>> > when the mac goes to sleep, the win10 machine looses it's ip address >>> > which becomes a 169. address >>> > >>> > as soon as i wake the mac up, the win machine regain a valid 10.0.0.x >>> ip >>> > >>> > i tried to replace the AP with a 4 port switch and got same results >>> > >>> > >>> > any idea ? >>> > >>> >>> IP in the 169.254.0.0/16 range is related to bonjour protocol , it is >>> a link local communication. >>> >>> your windows would move to a bonjur ip in many cases but most common >>> that can happen if your machine has a bonjour service enabled and an >>> Ethernet card with dhcp that can not get an ip from the router. >>> >>> 1. Check if when the mac is running your windows machine got it's ip >>> from the mac and not from the router. in some cases mac can have dhcpd >>> running on it, if that is the case you should disable it if you do not need >>> it. >>> 2. Check if homegroup is enabled on win10, if it is disable it (by >>> version 1803 it is no longer active by default, but you could have hacked >>> to enable it). >>> >>> >>> ___ >> Linux-il mailing list >> Linux-il@cs.huji.ac.il >> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il >> > ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
