Gentoo Archives: gentoo-user

From: Sergio Polini <sp_rm_it@×××××.it>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] OT: wlan0 is sssloooow [99% SOLVED]
Date: Tue, 28 Nov 2006 21:59:59
Message-Id: 200611282253.50735.sp_rm_it@yahoo.it
In Reply to: Re: [gentoo-user] OT: wlan0 is sssloooow by Richard Fish
1 Richard Fish:
2 > Ok, two things to try. First, remove the 192.168.2.1 nameserver
3 > from resolve.conf. That "nameserver" may be broken and unable to
4 > resolve names on the internet. This should help the "ping
5 > www.google.com" case.
6
7 Yes, I've already said that, but.... you are great! ;-)
8 I read your message this morning quickly, when I was going to work,
9 and didn'understand it.
10 Then I've spoken to a colleague of mine, a true network guru, a very
11 capable ethical hacker, and I've understood! (I suppose....)
12 My wireless router:
13 a) runs a (WAN) DHCP client to get its IP address and the IP addresses
14 of my provider's nameservers;
15 b) it get those IP addresses to send them to me when I run a DHCP
16 client; my wireless router runs a (LAN) DHCP server too, but it is
17 *not* a nameserver;
18 c) my DHCP client was configured as usual, i.e. "replace
19 my /etc/resolv.conf"; I've added
20
21 dhcpcd_toynet="-R -h sergio"
22 ^^
23
24 to /etc/conf.d/wireless and restarted /etc/init.d/net.wlan0.
25 Now... there is no line "nameserver 192.168.2.1" in
26 my /etc/resolv.conf and ping www.google.com is fast ;-)
27
28 BTW: This evening I've started running Windows at first. ipconfig /all
29 showed three nameservers, and 192.168.2.1 was the first one.
30 However, when I ran nslookup, the message was clear: 192.168.2.1 is
31 not a nameserver. Why the difference between fast (Windows) and slow
32 (my previous Gentoo box) Internet pings? Perhaps because the Windows
33 timeout is short: 2 seconds. I do not know how to eventually set such
34 a timeout in Linux....
35
36 > Second, does "ping -I wlan0 192.168.2.1" work better?
37
38 Nope. ping <-I wlan0 or -n> 192.168.2.1 is still blocked.
39 Well, it's just a nuisance, but I'll keep looking for a solution.
40 Any hints would be greately appreciated ;-)
41 That's not strange, because:
42
43 sergio ~ # nmap -sS -O -PI -PT 192.168.2.1
44
45 Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2006-11-28
46 22:21 CET
47 Interesting ports on 192.168.2.1:
48 Not shown: 1678 closed ports
49 PORT STATE SERVICE
50 80/tcp open http
51 4662/tcp filtered edonkey
52 MAC Address: 00:17:3F:0C:19:12 (Belkin)
53 Device type: broadband router
54 Running: Netgear embedded
55 OS details: Netgear Wireless router or Netgear FM114P/REPOTEC IP515H
56 Router & Print Server
57
58 Nmap finished: 1 IP address (1 host up) scanned in 4.834 seconds
59
60 i.e., port 7 (Echo) looks closed. Does Windows' ping (which works)
61 speak eDonkey? (very OT question ;-)
62
63 > Oh, one last thing....you don't have any firewall rules enabled,
64 > right? (iptables --list)
65
66 Right. I wish to configure my real (wire and wireless connection to my
67 ISP) and virtual (VMWare) networks, and then enable iptables.
68
69 Thanks a lot, as usual ;-)
70 Sergio
71
72 PS: I wish to thank Thomas Sjolshagen (private message) and Hans de
73 Hartog too. If one doesn't feel lonely when he tries to solve a
74 problem, well.... that helps a lot! My English is poor, but I hope
75 that you understand what I mean ;-)
76 --
77 gentoo-user@g.o mailing list

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Re: [gentoo-user] OT: wlan0 is sssloooow [100% SOLVED] Sergio Polini <sp_rm_it@×××××.it>