[Zlecenie] Zdiagnozowanie błędnej konfiguracji sieci na serwerze Debian

[jakub.krolikowski 1]

Potrzebuję pomocy administratora sieci w zdiagnozowaniu problemu na serwerze postawionym na Debianie.
Jest to serwer dedykowany w OVH, z jakiegoś powodu jest na nim bardzo niski download rate.
Serwer uruchomiony w trybie rescue (czyli z czystem systemem operacyjnym, bez mojej konfiguracji) ma normalne parametry sieciowe, a w trybie produkcyjnym plik 1GB potrafi ściągać się pół godziny.
Po restarcie serwera, przez jakiś czas sieć działa normalnie, potem się zatyka.

Serwer nie jest obciążony. Działa na nim kilka usług - postgresql, postfix, apache i tomcat.

Wklejam od razu wyniki poleceń testowych, które wykonałem na prośbę OVH w trybie produkcyjnym:

date && iperf -c iperf.ovh.net -P 5 
Sun 17 Jan 2021 06:57:32 PM CET
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to iperf.ovh.net, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  5] local 51.83.223.140 port 58802 connected with 188.165.12.136 port 5001
[  6] local 51.83.223.140 port 58800 connected with 188.165.12.136 port 5001
[  7] local 51.83.223.140 port 58804 connected with 188.165.12.136 port 5001
[  9] local 51.83.223.140 port 58808 connected with 188.165.12.136 port 5001
[  8] local 51.83.223.140 port 58806 connected with 188.165.12.136 port 5001
[ ID] Interval       Transfer     Bandwidth
[  9]  0.0-10.0 sec   236 MBytes   198 Mbits/sec
[  7]  0.0-10.0 sec   144 MBytes   120 Mbits/sec
[  6]  0.0-10.1 sec   193 MBytes   161 Mbits/sec
[  8]  0.0-10.1 sec   166 MBytes   138 Mbits/sec
[  4] local 51.83.223.140 port 5001 connected with 188.165.12.136 port 59753
[  7] local 51.83.223.140 port 5001 connected with 188.165.12.136 port 44617
[  8] local 51.83.223.140 port 5001 connected with 188.165.12.136 port 52201
[  9] local 51.83.223.140 port 5001 connected with 188.165.12.136 port 55513
[ 10] local 51.83.223.140 port 5001 connected with 188.165.12.136 port 40667
[  7]  0.0-985.6 sec  0.00 Bytes  0.00 bits/sec
[  8]  0.0-985.6 sec  0.00 Bytes  0.00 bits/sec
[  9]  0.0-985.6 sec  0.00 Bytes  0.00 bits/sec
[ 10]  0.0-985.6 sec  0.00 Bytes  0.00 bits/sec
[  4]  0.0-985.6 sec  0.00 Bytes  0.00 bits/sec
write failed: Broken pipe
[  5]  0.0-1006.3 sec   733 MBytes  6.11 Mbits/sec
[SUM]  0.0-1006.3 sec  1.44 GBytes  12.3 Mbits/sec

date && iperf -c iperf.ovh.net -i1 -t10 -r
Sun 17 Jan 2021 10:07:20 PM CET
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to iperf.ovh.net, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  4] local 51.83.223.140 port 33048 connected with 188.165.12.136 port 5001
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0- 1.0 sec  1.16 MBytes  9.74 Mbits/sec
[  4]  1.0- 2.0 sec  0.00 Bytes  0.00 bits/sec
[  4]  2.0- 3.0 sec   255 KBytes  2.09 Mbits/sec
[  4]  3.0- 4.0 sec   382 KBytes  3.13 Mbits/sec
[  4]  4.0- 5.0 sec   255 KBytes  2.09 Mbits/sec
[  4]  5.0- 6.0 sec   127 KBytes  1.04 Mbits/sec
[  4]  6.0- 7.0 sec   127 KBytes  1.04 Mbits/sec
[  4]  7.0- 8.0 sec  63.6 KBytes   521 Kbits/sec
[  4]  8.0- 9.0 sec   319 KBytes  2.61 Mbits/sec
[  4]  9.0-10.0 sec  1.61 MBytes  13.5 Mbits/sec
[  4] 10.0-11.0 sec   318 KBytes  2.61 Mbits/sec
[  4]  0.0-11.1 sec  4.58 MBytes  3.47 Mbits/sec
[  4] local 51.83.223.140 port 5001 connected with 188.165.12.136 port 54881
[  4]  0.0- 1.0 sec   157 KBytes  1.29 Mbits/sec
[  4]  1.0- 2.0 sec   226 KBytes  1.85 Mbits/sec
[  4]  2.0- 3.0 sec   598 KBytes  4.90 Mbits/sec
[  4]  3.0- 4.0 sec   851 KBytes  6.97 Mbits/sec
[  4]  4.0- 5.0 sec  1003 KBytes  8.21 Mbits/sec
[  4]  5.0- 6.0 sec   998 KBytes  8.18 Mbits/sec
[  4]  6.0- 7.0 sec  1.07 MBytes  8.97 Mbits/sec
[  4]  7.0- 8.0 sec   918 KBytes  7.52 Mbits/sec
[  4]  8.0- 9.0 sec   494 KBytes  4.04 Mbits/sec
[  4]  9.0-10.0 sec   588 KBytes  4.82 Mbits/sec
[  4]  0.0-10.6 sec  7.01 MBytes  5.56 Mbits/sec
[SUM]  0.0-10.6 sec  7.16 MBytes  5.69 Mbits/sec


date && iperf -c iperf.ovh.net -i1 -t10 -r -P10 | grep SUM
Sun 17 Jan 2021 10:11:15 PM CET
write failed: Connection reset by peer
[SUM]  0.0- 1.0 sec   166 MBytes  1.40 Gbits/sec
[SUM]  0.0-10.1 sec   982 MBytes   817 Mbits/sec
write failed: Broken pipe
write failed: Broken pipe


date && iperf -c iperf.ovh.net -m -i 1 -n 100000000000000 -t 10 -d
Sun 17 Jan 2021 10:16:27 PM CET
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to iperf.ovh.net, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  4] local 51.83.223.140 port 33200 connected with 188.165.12.136 port 5001
[  5] local 51.83.223.140 port 5001 connected with 188.165.12.136 port 44259
[ ID] Interval       Transfer     Bandwidth
[  5]  0.0- 1.0 sec  1.03 MBytes  8.67 Mbits/sec
[  4]  0.0- 1.0 sec   640 KBytes  5.24 Mbits/sec
[  5]  1.0- 2.0 sec   943 KBytes  7.73 Mbits/sec
[  4]  1.0- 2.0 sec   330 KBytes  2.70 Mbits/sec
[  5]  2.0- 3.0 sec   766 KBytes  6.28 Mbits/sec
[  4]  2.0- 3.0 sec   255 KBytes  2.09 Mbits/sec
[  5]  3.0- 4.0 sec  2.49 MBytes  20.9 Mbits/sec
[  4]  3.0- 4.0 sec   318 KBytes  2.61 Mbits/sec
[  5]  4.0- 5.0 sec  1.77 MBytes  14.9 Mbits/sec
[  4]  4.0- 5.0 sec   382 KBytes  3.13 Mbits/sec
[  5]  5.0- 6.0 sec  1.50 MBytes  12.6 Mbits/sec
[  4]  5.0- 6.0 sec   127 KBytes  1.04 Mbits/sec
[  5]  6.0- 7.0 sec  1.71 MBytes  14.3 Mbits/sec
[  4]  6.0- 7.0 sec  2.86 MBytes  24.0 Mbits/sec
[  5]  7.0- 8.0 sec   909 KBytes  7.45 Mbits/sec
[  4]  7.0- 8.0 sec   191 KBytes  1.56 Mbits/sec
[  5]  8.0- 9.0 sec   863 KBytes  7.07 Mbits/sec
[  4]  8.0- 9.0 sec   255 KBytes  2.09 Mbits/sec
[  4]  9.0-10.0 sec  63.6 KBytes   521 Kbits/sec
[  5]  9.0-10.0 sec   775 KBytes  6.35 Mbits/sec
[  5]  0.0-10.0 sec  12.7 MBytes  10.6 Mbits/sec
[  5] MSS size 1448 bytes (MTU 1500 bytes, ethernet)
[SUM]  0.0-10.0 sec  13.7 MBytes  11.5 Mbits/sec
[  4] 10.0-11.0 sec   318 KBytes  2.61 Mbits/sec
[  4]  0.0-11.6 sec  5.73 MBytes  4.16 Mbits/sec
[  4] MSS size 1448 bytes (MTU 1500 bytes, ethernet)


wget -O /dev/null http://proof.ovh.net/files/1Gio.dat
--2021-01-17 22:17:02--  http://proof.ovh.net/files/1Gio.dat
Resolving proof.ovh.net (proof.ovh.net)... 188.165.12.106, 2001:41d0:2:876a::1
Connecting to proof.ovh.net (proof.ovh.net)|188.165.12.106|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1073741824 (1.0G) [application/octet-stream]
Saving to: ‘/dev/null’

/dev/null                    100%[==============================================>]   1.00G   405KB/s    in 37m 22s

2021-01-17 22:54:27 (468 KB/s) - ‘/dev/null’ saved [1073741824/1073741824]

 

Nie potrafię namierzyć błędu.
Szukam osoby, która podejmie się zdiagnozowania i naprawienia problemu. Zupełnie nie wiem ile takie usługi kosztują, jestem gotów zapłacić 600 zł netto.

Po weryfikacji kwalifikacji, mam też inne zadania związane z administracją moich serwerów.

Proszę o kontakt na jakub@pakamera.com.pl