Groups > comp.os.linux.networking > #4704

Long delay when starting slrnpull

From	Charlie Gibbs <cgibbs@kltpzyxm.invalid>
Newsgroups	comp.os.linux.networking
Subject	Long delay when starting slrnpull
Date	2020-11-15 04:31 +0000
Organization	NewsGuy - Unlimited Usenet $23.95
Message-ID	<roqavg12kqs@news3.newsguy.com> (permalink)

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Every time I fire up slrnpull on my laptop when attached to my home
network, it sits for 20 to 30 seconds before checking the newsgroups
it's configured to download.  The actual checks and downloads run at
full speed.  This happens whether I'm using Wi-Fi or have an Ethernet
cable plugged in, and only happens on my home network; when I take the
laptop to the office it pulls news immediately.

I suspect that there might be some sort of DNS problem, but I'm
not sure.  Most other Internet functions work well, and speedtest.net
indicates 88Mbps for downloads and almost as fast for uploads.

Any idea where I should look?  Below is the first part of a tcpdump,
trimmed just after the point where everything woke up.

(Debian Buster, slrnpull version 1.0.3)

13:41:55.720186 IP cjglap2.59960 > _gateway.domain: 15913+ A? news.newsguy.com. (34)
13:41:55.720217 IP cjglap2.59960 > _gateway.domain: 42553+ AAAA? news.newsguy.com. (34)
13:41:56.161877 IP cjglap2.47905 > _gateway.domain: 8298+ PTR? 1.0.168.192.in-addr.arpa. (42)
13:42:00.724932 IP cjglap2.52392 > 75.153.171.122.domain: 15913+ A? news.newsguy.com. (34)
13:42:00.724964 IP cjglap2.52392 > 75.153.171.122.domain: 42553+ AAAA? news.newsguy.com. (34)
13:42:00.849895 ARP, Request who-has _gateway tell cjglap2, length 28
13:42:00.867532 IP 75.153.171.122.domain > cjglap2.52392: 15913 8/0/0 A 74.209.136.82, A 74.209.136.88, A 74.209.136.94, A 74.209.136.95, A 74.209.136.89, A 74.209.136.92, A 74.209.136.90, A 74.209.136.91 (162)
13:42:00.867569 IP 75.153.171.122.domain > cjglap2.52392: 42553 0/1/0 (85)
13:42:00.867582 ARP, Reply _gateway is-at 10:78:5b:c8:34:d0 (oui Unknown), length 46
13:42:00.868016 IP cjglap2.33958 > news.newsguy.com.nntp: Flags [S], seq 3627346142, win 64240, options [mss 1460,sackOK,TS val 959274309 ecr 0,nop,wscale 7], length 0
13:42:00.974107 IP news.newsguy.com.nntp > cjglap2.33958: Flags [S.], seq 1176698976, ack 3627346143, win 65535, options [mss 1460,nop,wscale 6,sackOK,TS val 2806053013 ecr 959274309], length 0
13:42:00.974160 IP cjglap2.33958 > news.newsguy.com.nntp: Flags [.], ack 1, win 502, options [nop,nop,TS val 959274415 ecr 2806053013], length 0
13:42:01.166389 IP cjglap2.41331 > 75.153.171.122.domain: 8298+ PTR? 1.0.168.192.in-addr.arpa. (42)
13:42:01.192641 IP 75.153.171.122.domain > cjglap2.41331: 8298 NXDomain* 0/1/0 (101)
13:42:01.208844 IP cjglap2.55728 > _gateway.domain: 16832+ PTR? 46.0.168.192.in-addr.arpa. (43)
13:42:01.234545 IP _gateway.domain > cjglap2.55728: 16832 NXDomain* 0/1/0 (102)
13:42:01.281870 IP cjglap2.60452 > _gateway.domain: 20526+ PTR? 122.171.153.75.in-addr.arpa. (45)
13:42:01.306107 IP _gateway.domain > cjglap2.60452: 20526 NXDomain 0/1/0 (105)
13:42:01.321593 IP cjglap2.37199 > _gateway.domain: 60411+ PTR? 82.136.209.74.in-addr.arpa. (44)
13:42:01.672966 IP _gateway.domain > cjglap2.37199: 60411 1/0/0 PTR news.newsguy.com. (74)
13:42:05.879967 ARP, Request who-has cjglap2 tell _gateway, length 46
13:42:05.879996 ARP, Reply cjglap2 is-at 18:3d:a2:a6:56:14 (oui Unknown), length 28
13:42:05.897566 IP _gateway.37186 > cjglap2.netbios-ns: UDP, length 50
13:42:05.897612 IP cjglap2 > _gateway: ICMP cjglap2 udp port netbios-ns unreachable, length 86
13:42:28.391109 IP news.newsguy.com.nntp > cjglap2.33958: Flags [P.], seq 1:44, ack 1, win 1040, options [nop,nop,TS val 2806080439 ecr 959274415], length 43
13:42:28.391155 IP cjglap2.33958 > news.newsguy.com.nntp: Flags [.], ack 44, win 502, options [nop,nop,TS val 959301832 ecr 2806080439], length 0
13:42:28.391243 IP cjglap2.33958 > news.newsguy.com.nntp: Flags [P.], seq 1:14, ack 44, win 502, options [nop,nop,TS val 959301832 ecr 2806080439], length 13
13:42:28.487940 IP news.newsguy.com.nntp > cjglap2.33958: Flags [P.], seq 44:81, ack 14, win 1040, options [nop,nop,TS val 2806080535 ecr 959301832], length 37
13:42:28.488168 IP cjglap2.33958 > news.newsguy.com.nntp: Flags [P.], seq 14:36, ack 81, win 502, options [nop,nop,TS val 959301929 ecr 2806080535], length 22

-- 
/~\  Charlie Gibbs                  |  "Some of you may die,
\ /  <cgibbs@kltpzyxm.invalid>      |  but it's sacrifice
 X   I'm really at ac.dekanfrus     |  I'm willing to make."
/ \  if you read it the right way.  |    -- Lord Farquaad (Shrek)

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Thread

Long delay when starting slrnpull Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-11-15 04:31 +0000
  Re: Long delay when starting slrnpull Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-11-15 08:00 +0000
    Re: Long delay when starting slrnpull Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-11-15 18:03 +0000
  Re: Long delay when starting slrnpull Richard Kettlewell <invalid@invalid.invalid> - 2020-11-15 11:49 +0000
    Re: Long delay when starting slrnpull Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-11-15 18:03 +0000
      Re: Long delay when starting slrnpull Richard Kettlewell <invalid@invalid.invalid> - 2020-11-16 17:27 +0000
        Re: Long delay when starting slrnpull Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-11-17 00:18 +0000

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