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#1 2020-02-25 18:20:53

aditya12398
Member
From: India
Registered: 2020-02-25
Posts: 1

WiFi stops working temporarily when connected behind a proxy server.

I am a university student so all network that I connect to (LAN, WiFi) have proxy server configured.

My WiFi stops working for a few seconds every 5 minutes and then starts working again. This causes downloads of large files to stop and drops the speed to 0 and then they resume again after a few seconds. I tried to diagnose the problem and found out that this behavior is not encountered when connected to my mobile's wifi hotspot. I also found out that every time the connection breaks, NetworkManager-dispatcher.service is started again then stopped exactly 10 seconds later. This is how the output for httping looks like:

[slimshady@arch-linux-hp-probook-g3-450 ~]$ httping -x 172.16.2.30:8080 -g www.google.com
.
connected to www.google.com:80 (384 bytes), seq=1413 time=353.91 ms 
connected to www.google.com:80 (384 bytes), seq=1414 time=566.86 ms 
timeout while receiving reply-headers from host
connect time out

connect time out

connect time out

connected to www.google.com:80 (384 bytes), seq=1419 time=253.36 ms 
connected to www.google.com:80 (384 bytes), seq=1420 time=758.35 ms
.

I tried to see stuff in journalctl -f and this is how it looks like:

.
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1796] dhcp4 (wlp3s0): option dhcp_lease_time      => '600'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1797] dhcp4 (wlp3s0): option domain_name          => 'iitkgp.ac.in'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1798] dhcp4 (wlp3s0): option domain_name_servers  => '172.16.1.164 172.16.1.180'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1799] dhcp4 (wlp3s0): option expiry               => '1582520695'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1800] dhcp4 (wlp3s0): option ip_address           => '10.145.142.26'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1800] dhcp4 (wlp3s0): option requested_broadcast_address => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1801] dhcp4 (wlp3s0): option requested_domain_name => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1802] dhcp4 (wlp3s0): option requested_domain_name_servers => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1802] dhcp4 (wlp3s0): option requested_domain_search => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1803] dhcp4 (wlp3s0): option requested_host_name  => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1804] dhcp4 (wlp3s0): option requested_interface_mtu => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1804] dhcp4 (wlp3s0): option requested_ms_classless_static_routes => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1805] dhcp4 (wlp3s0): option requested_nis_domain => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 dbus-daemon[464]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.15' (uid=0 pid=465 comm="/usr/bin/NetworkManager --no-daemon ")
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1806] dhcp4 (wlp3s0): option requested_nis_servers => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1806] dhcp4 (wlp3s0): option requested_ntp_servers => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1807] dhcp4 (wlp3s0): option requested_rfc3442_classless_static_routes => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1807] dhcp4 (wlp3s0): option requested_root_path  => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1808] dhcp4 (wlp3s0): option requested_routers    => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1809] dhcp4 (wlp3s0): option requested_static_routes => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1809] dhcp4 (wlp3s0): option requested_subnet_mask => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1810] dhcp4 (wlp3s0): option requested_time_offset => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1811] dhcp4 (wlp3s0): option requested_wpad       => '1'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1811] dhcp4 (wlp3s0): option routers              => '10.145.128.2'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1812] dhcp4 (wlp3s0): option subnet_mask          => '255.255.128.0'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 NetworkManager[465]: <info>  [1582520095.1813] dhcp4 (wlp3s0): state changed extended -> extended
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 systemd[1]: Starting Network Manager Script Dispatcher Service...
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 dbus-daemon[464]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=NetworkManager-dispatcher comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 systemd[1]: Started Network Manager Script Dispatcher Service.
Feb 24 10:24:55 arch-linux-hp-probook-g3-450 kernel: audit: type=1130 audit(1582520095.192:167): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=NetworkManager-dispatcher comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Feb 24 10:25:05 arch-linux-hp-probook-g3-450 systemd[1]: NetworkManager-dispatcher.service: Succeeded.
Feb 24 10:25:05 arch-linux-hp-probook-g3-450 audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=NetworkManager-dispatcher comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Feb 24 10:25:05 arch-linux-hp-probook-g3-450 kernel: audit: type=1131 audit(1582520105.682:168): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=NetworkManager-dispatcher comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
.

This dispatcher service being started and stopped every 5 minutes is not observed when connected to my mobile hotspot or LAN.

Some other information that might be relevant is:
WiFi uses Protected EAP with WPA/WPA2 Enterprise encryption without CA certificate (?).

Any help would be appreciated. The output for journalctl -f is here and that of httping is here

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