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Groups > comp.os.linux.networking > #1318
| From | ein <ein@no.spam> |
|---|---|
| Newsgroups | comp.os.linux.networking |
| Subject | Re: iptables NAT forwarding adding 75-100ms |
| Date | 2012-04-30 11:06 +0200 |
| Organization | ATMAN - ATM S.A. |
| Message-ID | <jnlkm8$7c3$1@node2.news.atman.pl> (permalink) |
| References | <slrnjprgv7.6dm.mike.lovell@usenet.home.b0h0.com> |
On 04/30/2012 12:42 AM, Mike Lovell wrote: > I have a strange occurrence of lag on my local networking. I have a > cable modem that plugs into a Debian server, then that Debian server is > plugged into a switch that all other machines in the house connect to. > > So something like: > > wan0 -> wan > eth0 -> lan > > The relevant forwarding/NAT rules are: > > > #iptables -A FORWARD -i wan0 -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT > #iptables -A FORWARD -i eth0 -o wan0 -j ACCEPT > > #iptables -t nat -A POSTROUTING -o wan0 -j MASQUERADE > > > So pretty standard boring NAT. How many FORWARD rules u have? Do above rules are in beginning of FORWARD chain? If no, please switch them as far of begin as u can. Is lag time changed? > Lag is occurring (between 75ms and 100ms) on all forwarding rules. Apart > from the lag they function fine (no connectivity issues). How do u check that? > Ping: LAN Machine -> Debian Router = ~0.7ms > Ping: Debian Router -> Google = ~20ms > Ping: LAN Machine -> Google = ~121ms !!! Wrong! Please 'ping' nearest machine after your router for example your ISP's gateway or ISP's DNS servers. Please have in mind that your ISP's router have more important things to do, than respond to ICMP echo request messages. > The Debian server has plenty of free RAM, the load is showing as low, > it's (at this time) entirely dedicated to routing - Why is it > introducing 100ms of lag into forwarded traffic??? What version of Debian is it? How much forward traffic u have? > I get great speed from LAN machines, just high latency. Do you have some QoS at this machine?
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iptables NAT forwarding adding 75-100ms Mike Lovell <mike.lovell@null.local> - 2012-04-29 17:42 -0500
Re: iptables NAT forwarding adding 75-100ms ein <ein@no.spam> - 2012-04-30 11:06 +0200
Re: iptables NAT forwarding adding 75-100ms ein <ein@no.spam> - 2012-04-30 11:08 +0200
Re: iptables NAT forwarding adding 75-100ms Mike Lovell <mike.lovell@null.local> - 2012-04-30 10:11 -0500
Re: iptables NAT forwarding adding 75-100ms Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-05-01 02:21 +0200
Re: iptables NAT forwarding adding 75-100ms Mike Lovell <mike.lovell@null.local> - 2012-04-30 19:46 -0500
Re: iptables NAT forwarding adding 75-100ms Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-05-01 03:01 +0200
Re: iptables NAT forwarding adding 75-100ms Mike Lovell <mike.lovell@null.local> - 2012-04-30 20:09 -0500
Re: iptables NAT forwarding adding 75-100ms Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-05-01 03:55 +0200
Re: iptables NAT forwarding adding 75-100ms Mike Lovell <mike.lovell@null.local> - 2012-04-30 21:07 -0500
Re: iptables NAT forwarding adding 75-100ms Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-05-01 10:46 +0200
Re: iptables NAT forwarding adding 75-100ms Ralph Spitzner <rasp@spitzner.org> - 2012-05-04 09:30 +0200
Re: iptables NAT forwarding adding 75-100ms Ian Zimmerman <itz@buug.org> - 2012-05-01 12:35 -0700
Re: iptables NAT forwarding adding 75-100ms Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-05-02 00:06 +0200
Re: iptables NAT forwarding adding 75-100ms ein <ein@no.spam> - 2012-05-02 07:43 +0200
Re: iptables NAT forwarding adding 75-100ms Ralph Spitzner <rasp@spitzner.org> - 2012-05-04 09:22 +0200
Re: iptables NAT forwarding adding 75-100ms Chris Davies <chris-usenet@roaima.co.uk> - 2012-04-30 10:34 +0100
Re: iptables NAT forwarding adding 75-100ms Richard Kettlewell <rjk@greenend.org.uk> - 2012-04-30 11:15 +0100
Re: iptables NAT forwarding adding 75-100ms Chris Davies <chris-usenet@roaima.co.uk> - 2012-04-30 23:59 +0100
Re: iptables NAT forwarding adding 75-100ms Rick Jones <rick.jones2@hp.com> - 2012-04-30 18:33 +0000
Re: iptables NAT forwarding adding 75-100ms ein <ein@no.spam> - 2012-05-02 07:51 +0200
Re: iptables NAT forwarding adding 75-100ms Rick Jones <rick.jones2@hp.com> - 2012-05-02 19:07 +0000
Re: iptables NAT forwarding adding 75-100ms Alastair Black <abqab.nemo@example.net> - 2012-04-30 06:40 -0600
Re: iptables NAT forwarding adding 75-100ms Mike Lovell <mike.lovell@null.local> - 2012-04-30 10:12 -0500
Re: iptables NAT forwarding adding 75-100ms Wolfram Gloger <wmglo@dent.med.uni-muenchen.de> - 2012-05-09 14:05 +0200
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