iftop-users

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195 discussions

[PATCH] Fix minor ui annoyance when ligatures are suported.
by Ariel Popper 14 Jul '20

14 Jul '20

When `iftop` is run under a terminal/font combination that supports ligatures, the "<=" characters form a single, stacked "less than or equal to" glyph rather than an arrow pointing left. This patch replaces "<=" with "<-" along with some others in order to remain visually consistant. --- ui.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/ui.c b/ui.c index abaadd2..5878330 100644 --- a/ui.c +++ b/ui.c @@ -330,17 +330,17 @@ void ui_print() { switch(options.linedisplay) { case OPTION_LINEDISPLAY_TWO_LINE: - mvaddstr(y, x, " => "); - mvaddstr(y+1, x, " <= "); + mvaddstr(y, x, " -> "); + mvaddstr(y+1, x, " <- "); break; case OPTION_LINEDISPLAY_ONE_LINE_BOTH: mvaddstr(y, x, "<=> "); break; case OPTION_LINEDISPLAY_ONE_LINE_SENT: - mvaddstr(y, x, " => "); + mvaddstr(y, x, " -> "); break; case OPTION_LINEDISPLAY_ONE_LINE_RECV: - mvaddstr(y, x, " <= "); + mvaddstr(y, x, " <- "); break; } -- 2.27.0

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Does iftop use decimal (k=1000) or binary (k=1024) prefixes for bit/byte display?
by Jaime 29 Jun '20

29 Jun '20

Hi. Could someone please tell me whether iftop uses decimal (k=1000) or binary (k=1024) prefixes for bandwidth usage display in bits and bytes (not packets). I've had a quick dig in the source and I think that (according to the definition of, and calls to, readable_size in ui_common.c) it's 1024, but I'd be very grateful for a confirmation either way. (FWIW, I'm using iftop "2018-10-03-77901c8c-1" on Openwrt trunk) Many thanks, Jaime

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Re: [Iftop-users] Reset bars
by R.C. 11 Apr '20

11 Apr '20

I use iftop to monitor data traffic between cluster members that live in a cluster-dedicated lan. No other traffic there. When cluster load falls, it is no more possible to see the load repartition between members at a glance. Anyhow, I understand this is a bit specific use case for which iftop had not been designed for. Il 11/04/2020 19:14, Shawn Landden ha scritto: > I think the idea is that lines have specific hardware bandwidth limits, > and that not resetting is the correct behaviour, as rates far below the > limits are boring, but I can see if you have lan Vs internet on the same > line that would make more sense (you could even put them on different > lines by categorising by dest address) > > 15:29, 11 de abril de 2020, "R.C." <milanraf(a)hotmail.com>: > > Hi all > > I cannot find a way to reset bar graphs scale. This would be useful > when > average datarate falls down from a high rate period and bars disappear, > being too short. > > Thank you > > Raf > > _______________________________________________ > iftop-users mailing list > iftop-users(a)lists.beasts.org <mailto:iftop-users@lists.beasts.org> > http://lists.beasts.org/mailman/listinfo/iftop-users > > > > -- > Shawn Landden

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Reset bars
by R.C. 11 Apr '20

11 Apr '20

Hi all I cannot find a way to reset bar graphs scale. This would be useful when average datarate falls down from a high rate period and bars disappear, being too short. Thank you Raf

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latest iftop question
by Rich Painter 15 Jul '19

15 Jul '19

I'm running iftop on ubuntu 16 and it looks like it is running correctly... However,the display is not using graphic chars and I'm getting lines of "q" and some "v". my terminal type is xterm-256color and running from putty 0.71 any ideas on how to get the graphics? thanks oldunixguy

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Re: [Iftop-users] Iftop-pre4 and text options
by carbo＠inrete.it 13 Mar '19

13 Mar '19

Hello all, I have to sniff internet traffic (igress and egress) but regardless of the display options I can set, for example only entry or exit traffic, with the -t option I always get only one ouput with both directions. Example I want to capure incoming traffic. in the conf file I set line-display: one-line-received /usr/sbin/iftop-new -c /root/.iftopigress -L 300 I obtain all incoming traffic The same thing that I obtain launching iftop followed by double t and 3 options: 19.19.19.19:22267 <= 23.50.100.254:https 19.1kb 9.54kb 9.54kb 19.19.19.15:15831 <= 169.50.27.202:https 17.3kb 8.66kb 8.66kb 19.19.19.12:https <= 89.96.192.28:40576 0b 8.52kb 8.52kb When I add on the prompt command line -t option the text output is different: iftop-new -i eth0 -n -P -o 40s -L 300 -t -s 10 1 19.19.19.19:25653 => 146Kb 158Kb 158Kb 197KB 8.248.205.254:http <= 7.80Mb 8.40Mb 8.40Mb 10.5MB 2 19.19.19.19:https => 8.83Mb 2.01Mb 2.01Mb 2.51MB 93.57.248.155:58651 <= 132Kb 32.5Kb 32.5Kb 40.7KB The second problem is that the -s option for the timeout is only associated to the text mode only. I must work with ulimit -tm timeout or alarm parameter on perl script. I would like something included in the iftop program. The third problem is that if I do not use text mode (without t option) I obtain ncurses output that I can open with cat. Mey you suggest me a Linux tool to convert ncurses file to ascii ? Thank you guys. Regards Nellox

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linear scale calibration problem
by Markus Koschany 03 Mar '19

03 Mar '19

Hello, I am hereby forwarding Debian bug: 922427 https://bugs.debian.org/922427 In a nutshell: The initial linear scale of the bandwidth is often much wider than the actual available network bandwidth, leading to bar graphs that are quite narrow. There are existing options like -L and -m that can mitigate the problem but still the initial scaling can assume much more bandwidth than is actually available. Maybe avoiding to resize the scale to more than 120% of the max bandwidth seen, would solve the problem. Regards, Markus Here is the complete bug report for your convenience: The way iftop calibrates its linear scale, it seems to often make the scale much wider than the actual available network bandwidth, leading to bar graphs that are quite narrow, often 1 character wide or 0 characters wide, for network connections that are pushing relatively a lot of traffic. This makes it not very useful to spotting at a glance what is eating bandwidth. I generally press L to switch to log scale, which avoids the problem, showing big wide bars. For example, I've started iftop when the network is nearly completely idle. It picked a scale 1KB-8KB, which is fine. Then I started a download, which ran at 300-615KB/s. This causes the scale to change to 2MB-12MB. Since my wifi connection happens to be limited to around 1MB/s, this guarantees bars will never be more than a few characters wide. Here's how that displays after downloading for several minutes: 2.38MB 4.77MB 7.15MB 9.54MB 11.9MB └───────────────┴───────────────┴────────────────┴───────────────┴──────────────── darkstar.kitenet.:51000 => kitenet.net:ssh 849KB 6.87KB 5.68KB 5.95KB ### <= 57.7MB 478KB 381KB 410KB ────────────────────────────────────────────────────────────────────────────────── TX: cum: 1.10MB peak: 9.33KB rates: 7.07KB 4.95KB 6.71KB RX: 72.0MB 648KB 466KB 325KB 457KB TOTAL: 73.1MB 657KB 473KB 330KB 463KB ("RX:" is highlighted and I've marked the top highlight using "###".)

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Looking to cancel your subscription?
by Team at TruBrain 15 Jun '18

15 Jun '18

Hi Iftop-users, TruBrain Brainiac Bot at your service! Sounds like you’re looking to cancel your subscription! You can do that easily by registering and signing into your account portal. Click “Cancel” on whichever subscription(s) you’d like to stop. Choose a reason why (and try out our bars or capsules if taste was an issue!) Then return to your account page to see the updated information. If you’re having issues, you can also fill out our cancellation form, and we can do it manually for you. If you’re looking for a refund for one of your purchases, please respond to this email with “Refund Request”, and a representative will get back to you ASAP to help you with your request. We hate to see you leave! Thank you for trying out TruBrain and being a valuable customer. Cheers, The TruBrain Team (Not what you were asking for?? Just reply “Not quite!” to this email and we’ll get you taken care of ASAP! I am just a bot after all!)

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Ticket Received - iftop-users Digest, Vol 5, Issue 3
by Team at TruBrain 14 Jun '18

14 Jun '18

Dear Iftop-users, Thank you for messaging us here at TruBrain! We would like to acknowledge that we have received your request and a ticket has been created. We try to be responsive and will get back to you as soon as we can! Thank you for your patience. Have a great day, TruBrain Support Team

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v4tunnels cannot be listened to
by Shawn Landden 14 Jun '18

14 Jun '18

such as those made with Hurricane Electric for ipv6 connectivity to reproduce: my /etc/network/interfaces iface he-ipv6 inet6 v4tunnel address 2001:470:c:238::2 netmask 64 #LA 0.5ms endpoint 66.220.18.42 local 198.46.198.198 ttl 255 gateway 2001:470:c:238::1 up ip addr add 2001:470:d:238::1 dev he-ipv6 iftop -i he-ipv6 (nothing shows) reported to debian here https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901283 it works with tcpdump/libpcap

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