Hi
can anyone explain why i get every second ping missing packets from AMPRGW ?
it happen not only from my PC also from other places ...
Regards
Ronen-4Z4ZQ
Ronen Pinchooks (4Z4ZQ) WebSitehttp://www.ronen.org/ www.ronen.org ronen.org (Ronen Pinchooks (4Z4ZQ) WebSite) is hosted by domainavenue.com
C:\Documents and Settings\customer>ping 169.228.66.251
Pinging 169.228.66.251 with 32 bytes of data:
Request timed out. Reply from 169.228.66.251: bytes=32 time=336ms TTL=40 Request timed out. Reply from 169.228.66.251: bytes=32 time=286ms TTL=40
Ping statistics for 169.228.66.251: Packets: Sent = 4, Received = 2, Lost = 2 (50% loss), Approximate round trip times in milli-seconds: Minimum = 286ms, Maximum = 336ms, Average = 311ms
C:\Documents and Settings\customer>
Could you please do traceroute and winmtr scan?
73, LZ1ETE
On Tue, Aug 23, 2016 at 12:56 PM, R P ronenp@hotmail.com wrote:
(Please trim inclusions from previous messages) _______________________________________________ Hi
can anyone explain why i get every second ping missing packets from AMPRGW ?
it happen not only from my PC also from other places ...
Regards
Ronen-4Z4ZQ
Ronen Pinchooks (4Z4ZQ) WebSitehttp://www.ronen.org/ www.ronen.org ronen.org (Ronen Pinchooks (4Z4ZQ) WebSite) is hosted by domainavenue.com
C:\Documents and Settings\customer>ping 169.228.66.251
Pinging 169.228.66.251 with 32 bytes of data:
Request timed out. Reply from 169.228.66.251: bytes=32 time=336ms TTL=40 Request timed out. Reply from 169.228.66.251: bytes=32 time=286ms TTL=40
Ping statistics for 169.228.66.251: Packets: Sent = 4, Received = 2, Lost = 2 (50% loss), Approximate round trip times in milli-seconds: Minimum = 286ms, Maximum = 336ms, Average = 311ms
C:\Documents and Settings\customer>
what is winmtr ?
Tracing route to amprgw.sysnet.ucsd.edu [169.228.66.251] over a maximum of 30 hops:
1 7 ms 3 ms 3 ms 192.168.1.1 2 * * * Request timed out. 3 19 ms 17 ms 19 ms hfa-hot-N.con.hotnet.net.il [213.57.3.238] 4 24 ms 15 ms 16 ms ae1.200.hfa.mx-hot-N.con.hotnet.net.il [213.57.3 .237] 5 20 ms 17 ms 17 ms ae7.50.pt.mx-mx.con.hotnet.net.il [213.57.0.249]
6 89 ms 85 ms 86 ms ffm-b4-link.telia.net [213.248.69.137] 7 81 ms 77 ms 77 ms ffm-bb3-link.telia.net [62.115.120.5] 8 79 ms 78 ms 78 ms ffm-b10-link.telia.net [80.91.251.124] 9 76 ms 74 ms 186 ms ae11.edge4.Frankfurt.Level3.net [4.68.70.105] 10 * * * Request timed out. 11 300 ms 306 ms 308 ms CENIC.ear1.LosAngeles1.Level3.net [4.35.156.66]
12 331 ms 307 ms 342 ms dc-tus-agg3--lax-agg6-100ge.cenic.net [137.164.1 1.7] 13 343 ms 293 ms 307 ms dc-sdg-agg4--tus-agg3-100ge.cenic.net [137.164.1 1.9] 14 330 ms 306 ms 308 ms dc-ucsd-1--sdg-agg4.cenic.net [137.164.23.54] 15 246 ms 244 ms 244 ms nodem-core--mx0-30ge.ucsd.edu [132.239.254.163]
16 247 ms 330 ms 308 ms ebu3b-6509-720-vlan910-gw1.ucsd.edu [132.239.255 .131] 17 * * 335 ms amprgw.sysnet.ucsd.edu [169.228.66.251]
Trace complete.
C:\Documents and Settings\customer>
________________________________ From: 44Net 44net-bounces+ronenp=hotmail.com@hamradio.ucsd.edu on behalf of Todor Kandev todor@kandev.com Sent: Tuesday, August 23, 2016 2:59 AM To: AMPRNet working group Subject: Re: [44net] missing packets in to AMPRGW ?
(Please trim inclusions from previous messages) _______________________________________________ Could you please do traceroute and winmtr scan?
73, LZ1ETE
On Tue, Aug 23, 2016 at 12:56 PM, R P ronenp@hotmail.com wrote:
(Please trim inclusions from previous messages) _______________________________________________ Hi
can anyone explain why i get every second ping missing packets from AMPRGW ?
it happen not only from my PC also from other places ...
Regards
Ronen-4Z4ZQ
Ronen Pinchooks (4Z4ZQ) WebSitehttp://www.ronen.org/ www.ronen.org ronen.org (Ronen Pinchooks (4Z4ZQ) WebSite) is hosted by domainavenue.com
Ronen Pinchooks (4Z4ZQ) WebSitehttp://www.ronen.org/ www.ronen.orghttp://www.ronen.org ronen.org (Ronen Pinchooks (4Z4ZQ) WebSite) is hosted by domainavenue.com
C:\Documents and Settings\customer>ping 169.228.66.251
Pinging 169.228.66.251 with 32 bytes of data:
Request timed out. Reply from 169.228.66.251: bytes=32 time=336ms TTL=40 Request timed out. Reply from 169.228.66.251: bytes=32 time=286ms TTL=40
Ping statistics for 169.228.66.251: Packets: Sent = 4, Received = 2, Lost = 2 (50% loss), Approximate round trip times in milli-seconds: Minimum = 286ms, Maximum = 336ms, Average = 311ms
C:\Documents and Settings\customer>
http://winmtr.net/ It is something like ping and traceroute at the same time. Pings each hop in the path and shows you where the drop is.
73, LZ1ETE
On Tue, Aug 23, 2016 at 1:03 PM, R P ronenp@hotmail.com wrote:
(Please trim inclusions from previous messages) _______________________________________________ what is winmtr ?
Tracing route to amprgw.sysnet.ucsd.edu [169.228.66.251] over a maximum of 30 hops:
1 7 ms 3 ms 3 ms 192.168.1.1 2 * * * Request timed out. 3 19 ms 17 ms 19 ms hfa-hot-N.con.hotnet.net.il [213.57.3.238] 4 24 ms 15 ms 16 ms ae1.200.hfa.mx-hot-N.con.hotnet.net.il [213.57.3 .237] 5 20 ms 17 ms 17 ms ae7.50.pt.mx-mx.con.hotnet.net.il [213.57.0.249]
6 89 ms 85 ms 86 ms ffm-b4-link.telia.net [213.248.69.137] 7 81 ms 77 ms 77 ms ffm-bb3-link.telia.net [62.115.120.5] 8 79 ms 78 ms 78 ms ffm-b10-link.telia.net [80.91.251.124] 9 76 ms 74 ms 186 ms ae11.edge4.Frankfurt.Level3.net [4.68.70.105] 10 * * * Request timed out. 11 300 ms 306 ms 308 ms CENIC.ear1.LosAngeles1.Level3.net [4.35.156.66]
12 331 ms 307 ms 342 ms dc-tus-agg3--lax-agg6-100ge.cenic.net [137.164.1 1.7] 13 343 ms 293 ms 307 ms dc-sdg-agg4--tus-agg3-100ge.cenic.net [137.164.1 1.9] 14 330 ms 306 ms 308 ms dc-ucsd-1--sdg-agg4.cenic.net [137.164.23.54] 15 246 ms 244 ms 244 ms nodem-core--mx0-30ge.ucsd.edu [132.239.254.163]
16 247 ms 330 ms 308 ms ebu3b-6509-720-vlan910-gw1.ucsd.edu [132.239.255 .131] 17 * * 335 ms amprgw.sysnet.ucsd.edu [169.228.66.251]
Trace complete.
C:\Documents and Settings\customer>
From: 44Net 44net-bounces+ronenp=hotmail.com@hamradio.ucsd.edu on behalf of Todor Kandev todor@kandev.com Sent: Tuesday, August 23, 2016 2:59 AM To: AMPRNet working group Subject: Re: [44net] missing packets in to AMPRGW ?
(Please trim inclusions from previous messages) _______________________________________________ Could you please do traceroute and winmtr scan?
73, LZ1ETE
On Tue, Aug 23, 2016 at 12:56 PM, R P ronenp@hotmail.com wrote:
(Please trim inclusions from previous messages) _______________________________________________ Hi
can anyone explain why i get every second ping missing packets from AMPRGW ?
it happen not only from my PC also from other places ...
Regards
Ronen-4Z4ZQ
Ronen Pinchooks (4Z4ZQ) WebSitehttp://www.ronen.org/ www.ronen.org ronen.org (Ronen Pinchooks (4Z4ZQ) WebSite) is hosted by domainavenue.com
Ronen Pinchooks (4Z4ZQ) WebSitehttp://www.ronen.org/ www.ronen.orghttp://www.ronen.org ronen.org (Ronen Pinchooks (4Z4ZQ) WebSite) is hosted by
domainavenue.com
C:\Documents and Settings\customer>ping 169.228.66.251
Pinging 169.228.66.251 with 32 bytes of data:
Request timed out. Reply from 169.228.66.251: bytes=32 time=336ms TTL=40 Request timed out. Reply from 169.228.66.251: bytes=32 time=286ms TTL=40
Ping statistics for 169.228.66.251: Packets: Sent = 4, Received = 2, Lost = 2 (50% loss), Approximate round trip times in milli-seconds: Minimum = 286ms, Maximum = 336ms, Average = 311ms
C:\Documents and Settings\customer>
On Tue, Aug 23, 2016 at 12:56 PM, R P ronenp@hotmail.com wrote:
can anyone explain why i get every second ping missing packets from AMPRGW ?
it happen not only from my PC also from other places ...
Maybe a load balancer that has ICMP blocked? Appears to be new behaviour though.
Keys: Help Display mode Restart statistics Order of fields quit Packets Pings Host Loss% Snt Last Avg Best Wrst StDev 1. 142.254.191.93 0.0% 141 8.1 9.8 7.4 153.2 13.1 2. xe-0-0-2.kanhhiad01h.hawaii.rr.c 0.0% 141 20.4 45.3 10.3 461.3 68.1 3. agg36.milnhixd01r.hawaii.rr.com 0.0% 141 9.3 9.6 6.2 27.3 1.6 4. agg31.lsancarc01r.socal.rr.com 0.0% 141 59.3 58.0 53.3 89.2 3.1 5. bu-ether16.lsancarc0yw-bcr00.tbo 0.0% 141 60.8 65.3 60.0 75.7 2.6 6. 0.ae1.pr0.lax00.tbone.rr.com 0.0% 141 60.5 61.5 59.8 89.6 3.6 7. UniversityCorpforAdvancedInterne 0.0% 141 57.8 58.6 56.9 97.8 5.3 8. et-7-3-0.80.rtsw.losa.net.intern 0.0% 141 61.3 61.4 59.9 91.6 3.5 9. 64.57.20.81 0.0% 141 66.4 66.3 62.2 125.0 5.0 10. dc-tus-agg3--lax-agg6-100ge.ceni 0.0% 141 66.6 67.1 65.6 124.9 5.1 11. dc-sdg-agg4--tus-agg3-100ge.ceni 0.0% 141 71.1 71.7 70.7 73.7 0.5 12. dc-ucsd-1--sdg-agg4.cenic.net 0.0% 141 70.5 70.9 65.9 85.2 2.1 13. nodem-core-6807-vlan2761-gw.ucsd 0.0% 140 71.0 75.0 69.0 385.9 27.6 14. ebu3b-6509-nodem-core-interconne 0.0% 140 71.7 72.4 70.8 86.6 2.1 15. amprgw.sysnet.ucsd.edu 56.1% 140 133.3 134.2 71.7 218.9 13.6
Antonio Querubin e-mail: tony@lavanauts.org xmpp: antonioquerubin@gmail.com
|------------------------------------------------------------------------------------------| | WinMTR statistics | | Host - % | Sent | Recv | Best | Avrg | Wrst | Last | |------------------------------------------------|------|------|------|------|------|------| | 192.168.1.1 - 0 | 19 | 19 | 1 | 3 | 7 | 3 | | No response from host - 100 | 4 | 0 | 0 | 0 | 0 | 0 | | hfa-hot-N.con.hotnet.net.il - 0 | 19 | 19 | 16 | 19 | 27 | 16 | | ae1.200.hfa.mx-hot-N.con.hotnet.net.il - 0 | 19 | 19 | 15 | 20 | 32 | 16 | | ae7.50.pt.mx-mx.con.hotnet.net.il - 0 | 19 | 19 | 18 | 21 | 34 | 21 | | ffm-b4-link.telia.net - 0 | 19 | 19 | 84 | 96 | 176 | 87 | | ffm-bb3-link.telia.net - 0 | 19 | 19 | 78 | 85 | 153 | 79 | | ffm-b10-link.telia.net - 0 | 19 | 19 | 76 | 88 | 175 | 79 | | ae11.edge4.Frankfurt.Level3.net - 0 | 19 | 19 | 73 | 81 | 153 | 78 | | No response from host - 100 | 4 | 0 | 0 | 0 | 0 | 0 | | CENIC.ear1.LosAngeles1.Level3.net - 0 | 19 | 19 | 255 | 313 | 497 | 274 | | dc-tus-agg3--lax-agg6-100ge.cenic.net - 0 | 19 | 19 | 258 | 313 | 498 | 273 | | dc-sdg-agg4--tus-agg3-100ge.cenic.net - 0 | 19 | 19 | 247 | 305 | 497 | 270 | | dc-ucsd-1--sdg-agg4.cenic.net - 0 | 19 | 19 | 247 | 306 | 498 | 270 | | nodem-core--mx0-30ge.ucsd.edu - 0 | 19 | 19 | 246 | 307 | 498 | 275 | | ebu3b-6509-720-vlan910-gw1.ucsd.edu - 0 | 19 | 19 | 247 | 305 | 497 | 270 | | No response from host - 100 | 4 | 0 | 0 | 0 | 0 | 0 | | No response from host - 100 | 4 | 0 | 0 | 0 | 0 | 0 | | amprgw.sysnet.ucsd.edu - 80 | 5 | 1 | 0 | 341 | 341 | 341 | |________________________________________________|______|______|______|______|______|______| WinMTR v0.92 GPL V2 by Appnor MSP - Fully Managed Hosting & Cloud Provider
________________________________ From: 44Net 44net-bounces+ronenp=hotmail.com@hamradio.ucsd.edu on behalf of Antonio Querubin tony@lavanauts.org Sent: Tuesday, August 23, 2016 3:14 AM To: AMPRNet working group Subject: Re: [44net] missing packets in to AMPRGW ?
(Please trim inclusions from previous messages) _______________________________________________ On Tue, Aug 23, 2016 at 12:56 PM, R P ronenp@hotmail.com wrote:
can anyone explain why i get every second ping missing packets from AMPRGW ?
it happen not only from my PC also from other places ...
Maybe a load balancer that has ICMP blocked? Appears to be new behaviour though.
Keys: Help Display mode Restart statistics Order of fields quit Packets Pings Host Loss% Snt Last Avg Best Wrst StDev 1. 142.254.191.93 0.0% 141 8.1 9.8 7.4 153.2 13.1 2. xe-0-0-2.kanhhiad01h.hawaii.rr.c 0.0% 141 20.4 45.3 10.3 461.3 68.1 3. agg36.milnhixd01r.hawaii.rr.com 0.0% 141 9.3 9.6 6.2 27.3 1.6 4. agg31.lsancarc01r.socal.rr.com 0.0% 141 59.3 58.0 53.3 89.2 3.1 5. bu-ether16.lsancarc0yw-bcr00.tbo 0.0% 141 60.8 65.3 60.0 75.7 2.6 6. 0.ae1.pr0.lax00.tbone.rr.com 0.0% 141 60.5 61.5 59.8 89.6 3.6 7. UniversityCorpforAdvancedInterne 0.0% 141 57.8 58.6 56.9 97.8 5.3 8. et-7-3-0.80.rtsw.losa.net.intern 0.0% 141 61.3 61.4 59.9 91.6 3.5 9. 64.57.20.81 0.0% 141 66.4 66.3 62.2 125.0 5.0 10. dc-tus-agg3--lax-agg6-100ge.ceni 0.0% 141 66.6 67.1 65.6 124.9 5.1 11. dc-sdg-agg4--tus-agg3-100ge.ceni 0.0% 141 71.1 71.7 70.7 73.7 0.5 12. dc-ucsd-1--sdg-agg4.cenic.net 0.0% 141 70.5 70.9 65.9 85.2 2.1 13. nodem-core-6807-vlan2761-gw.ucsd 0.0% 140 71.0 75.0 69.0 385.9 27.6 14. ebu3b-6509-nodem-core-interconne 0.0% 140 71.7 72.4 70.8 86.6 2.1 15. amprgw.sysnet.ucsd.edu 56.1% 140 133.3 134.2 71.7 218.9 13.6
Antonio Querubin e-mail: tony@lavanauts.org xmpp: antonioquerubin@gmail.com _________________________________________ 44Net mailing list 44Net@hamradio.ucsd.edu http://hamradio.ucsd.edu/mailman/listinfo/44net
Hmm, looks like I have it too:
H:>ping amprgw.sysnet.ucsd.edu -t Pinging amprgw.sysnet.ucsd.edu [169.228.66.251] with 32 bytes of data: Reply from 169.228.66.251: bytes=32 time=192ms TTL=49 Request timed out. Reply from 169.228.66.251: bytes=32 time=252ms TTL=49 Request timed out. Reply from 169.228.66.251: bytes=32 time=191ms TTL=49 Request timed out. Reply from 169.228.66.251: bytes=32 time=252ms TTL=49 Request timed out. Reply from 169.228.66.251: bytes=32 time=253ms TTL=49 Request timed out. Reply from 169.228.66.251: bytes=32 time=191ms TTL=49 Request timed out. Reply from 169.228.66.251: bytes=32 time=253ms TTL=49 Request timed out.
73, LZ1ETE
On Tue, Aug 23, 2016 at 1:54 PM, R P ronenp@hotmail.com wrote:
(Please trim inclusions from previous messages) _______________________________________________ |----------------------------------------------------------- -------------------------------| | WinMTR statistics | | Host - % | Sent | Recv | Best | Avrg | Wrst | Last | |------------------------------------------------|------|--- ---|------|------|------|------| | 192.168.1.1 - 0 | 19 | 19 | 1 | 3 | 7 | 3 | | No response from host - 100 | 4 | 0 | 0 | 0 | 0 | 0 | | hfa-hot-N.con.hotnet.net.il - 0 | 19 | 19 | 16 | 19 | 27 | 16 | | ae1.200.hfa.mx-hot-N.con.hotnet.net.il - 0 | 19 | 19 | 15 | 20 | 32 | 16 | | ae7.50.pt.mx-mx.con.hotnet.net.il - 0 | 19 | 19 | 18 | 21 | 34 | 21 | | ffm-b4-link.telia.net - 0 | 19 | 19 | 84 | 96 | 176 | 87 | | ffm-bb3-link.telia.net - 0 | 19 | 19 | 78 | 85 | 153 | 79 | | ffm-b10-link.telia.net - 0 | 19 | 19 | 76 | 88 | 175 | 79 | | ae11.edge4.Frankfurt.Level3.net - 0 | 19 | 19 | 73 | 81 | 153 | 78 | | No response from host - 100 | 4 | 0 | 0 | 0 | 0 | 0 | | CENIC.ear1.LosAngeles1.Level3.net - 0 | 19 | 19 | 255 | 313 | 497 | 274 | | dc-tus-agg3--lax-agg6-100ge.cenic.net - 0 | 19 | 19 | 258 | 313 | 498 | 273 | | dc-sdg-agg4--tus-agg3-100ge.cenic.net - 0 | 19 | 19 | 247 | 305 | 497 | 270 | | dc-ucsd-1--sdg-agg4.cenic.net - 0 | 19 | 19 | 247 | 306 | 498 | 270 | | nodem-core--mx0-30ge.ucsd.edu - 0 | 19 | 19 | 246 | 307 | 498 | 275 | | ebu3b-6509-720-vlan910-gw1.ucsd.edu - 0 | 19 | 19 | 247 | 305 | 497 | 270 | | No response from host - 100 | 4 | 0 | 0 | 0 | 0 | 0 | | No response from host - 100 | 4 | 0 | 0 | 0 | 0 | 0 | | amprgw.sysnet.ucsd.edu - 80 | 5 | 1 | 0 | 341 | 341 | 341 | |________________________________________________|______|___ ___|______|______|______|______| WinMTR v0.92 GPL V2 by Appnor MSP - Fully Managed Hosting & Cloud Provider
From: 44Net 44net-bounces+ronenp=hotmail.com@hamradio.ucsd.edu on behalf of Antonio Querubin tony@lavanauts.org Sent: Tuesday, August 23, 2016 3:14 AM To: AMPRNet working group Subject: Re: [44net] missing packets in to AMPRGW ?
(Please trim inclusions from previous messages) _______________________________________________ On Tue, Aug 23, 2016 at 12:56 PM, R P ronenp@hotmail.com wrote:
can anyone explain why i get every second ping missing packets from AMPRGW ?
it happen not only from my PC also from other places ...
Maybe a load balancer that has ICMP blocked? Appears to be new behaviour though.
Keys: Help Display mode Restart statistics Order of fields quit Packets Pings Host Loss% Snt Last Avg Best Wrst StDev
- 142.254.191.93 0.0% 141 8.1 9.8 7.4
153.2 13.1 2. xe-0-0-2.kanhhiad01h.hawaii.rr.c 0.0% 141 20.4 45.3 10.3 461.3 68.1 3. agg36.milnhixd01r.hawaii.rr.com 0.0% 141 9.3 9.6 6.2 27.3 1.6 4. agg31.lsancarc01r.socal.rr.com 0.0% 141 59.3 58.0 53.3 89.2 3.1 5. bu-ether16.lsancarc0yw-bcr00.tbo 0.0% 141 60.8 65.3 60.0 75.7 2.6 6. 0.ae1.pr0.lax00.tbone.rr.com 0.0% 141 60.5 61.5 59.8 89.6 3.6 7. UniversityCorpforAdvancedInterne 0.0% 141 57.8 58.6 56.9 97.8 5.3 8. et-7-3-0.80.rtsw.losa.net.intern 0.0% 141 61.3 61.4 59.9 91.6 3.5 9. 64.57.20.81 0.0% 141 66.4 66.3 62.2 125.0 5.0 10. dc-tus-agg3--lax-agg6-100ge.ceni 0.0% 141 66.6 67.1 65.6 124.9 5.1 11. dc-sdg-agg4--tus-agg3-100ge.ceni 0.0% 141 71.1 71.7 70.7 73.7 0.5 12. dc-ucsd-1--sdg-agg4.cenic.net 0.0% 141 70.5 70.9 65.9 85.2 2.1 13. nodem-core-6807-vlan2761-gw.ucsd 0.0% 140 71.0 75.0 69.0 385.9 27.6 14. ebu3b-6509-nodem-core-interconne 0.0% 140 71.7 72.4 70.8 86.6 2.1 15. amprgw.sysnet.ucsd.edu 56.1% 140 133.3 134.2 71.7 218.9 13.6
Antonio Querubin e-mail: tony@lavanauts.org xmpp: antonioquerubin@gmail.com _________________________________________ 44Net mailing list 44Net@hamradio.ucsd.edu http://hamradio.ucsd.edu/mailman/listinfo/44net
amprgw has an icmp response rate limit set to 1 per second.
If a bunch of people are triggering ICMP responses (by pinging it, traceroute to it, etc) at the same time it will not respond to all of them.
This is done via sysctl net.inet.icmp.icmplim=1 sysctl net.inet.icmp.icmplim_output=1
The log shows a large number of 'limiting icmp ping response' messages like the following:
Aug 23 06:40:01 <kern.crit> amprgw kernel: Limiting icmp ping response from 21 to 1 packets/sec
and tcpdump shows a LOT of icmp traffic.
As an experiment, I turned off icmp rate limiting for a brief period and the ping response "loss" rate went to zero, which I believe means that it's seeing a lot of traffic that would be generating icmp responses if it were not limited. - Brian
-
Antonio Querubin -
Brian Kantor -
R P -
Todor Kandev