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Diesel_Fuel n00b
Joined: 09 Oct 2005 Posts: 59
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Posted: Sat Nov 25, 2006 1:09 am Post subject: DNS Issues??? |
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Ok, I'm having a small problem with my site. I resolved my last issue about accessing the site internally via the domain by setting up an internal DNS server. That is all working fine. However, I have a friend who cannot access the site at all. Some others that have "tracerouted" my site all seem to end up with the same problem of DNS timing out. However, I find it odd that some can access it and some cannot access the site at all, though it appears all of them are having DNS issues.
Here is my request from Gentoo, notice it uses the internal DNS server:
Code: | dneufeld@localhost ~ $ /usr/sbin/traceroute thelst.com
traceroute to 192.168.0.2 (192.168.0.2), 30 hops max, 46 byte packets
1 192.168.0.2 (192.168.0.2) 0.131 ms 0.092 ms 0.087 ms
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Here is the request from my friend that cannot access the site AT ALL:
Code: | #
C:\Documents and Settings\Nick>tracert thelst.com
#
#
Tracing route to thelst.com [71.77.8.122]
#
over a maximum of 30 hops:
#
#
1 <1 ms <1 ms <1 ms 192.168.1.254
#
2 18 ms 17 ms 19 ms 68.208.230.1
#
3 22 ms 23 ms 22 ms 68.208.230.21
#
4 33 ms 33 ms 32 ms 205.152.46.65
#
5 24 ms 25 ms 24 ms 65.83.239.40
#
6 29 ms 27 ms 26 ms 65.83.238.19
#
7 32 ms 33 ms 33 ms axr00msy-1-0-0.bellsouth.net [65.83.236.35]
#
8 29 ms 31 ms 94 ms pxr00mia-0-0-0.bellsouth.net [65.83.236.16]
#
9 47 ms 44 ms 45 ms so-0-1-0-0.gar1.Miami1.Level3.net [65.57.174.5]
#
#
10 44 ms 67 ms 51 ms so-7-0-0.mp2.Miami1.Level3.net [4.68.112.45]
#
11 45 ms 48 ms 45 ms ae-0-0.bbr1.Atlanta1.Level3.net [64.159.1.45]
#
12 * 52 ms 49 ms ae-31-55.ebr1.Atlanta2.Level3.net [4.68.103.158]
#
#
13 * 49 ms 47 ms ae-4-4.car1.Charlotte1.Level3.net [4.69.132.161]
#
#
14 49 ms 50 ms 47 ms ae-4-4.car1.Charlotte1.Level3.net [4.69.132.161]
#
#
15 52 ms 57 ms 51 ms ROADRUNNER.car1.Charlotte1.Level3.net [4.71.124.
#
6]
#
16 61 ms 56 ms 54 ms pos12-0.rlghncrdc-rtr2.southeast.rr.com [24.93.6
#
4.106]
#
17 56 ms 56 ms 56 ms pos7-0.rlghnca-rtr2.nc.rr.com [24.25.0.10]
#
18 * 57 ms * gig0-2.rlghnca-ubr5.nc.rr.com [24.25.0.197]
#
19 * * * Request timed out.
#
20 * * * Request timed out.
#
21 * * * Request timed out.
#
22 * * * Request timed out.
#
23 * * * Request timed out.
#
24 * * * Request timed out.
#
25 * * * |
Here is the traceroute from a friend that CAN access the site, but seems to have issues:
Code: | ken$ traceroute thelst.com
traceroute to thelst.com (71.77.8.122), 64 hops max, 40 byte packets
1 10.119.48.1 (10.119.48.1) 7.697 ms 5.866 ms 5.500 ms
2 653215hfc254 (65.32.15.254) 11.470 ms 9.246 ms 8.277 ms
3 pos6-0-oc-192.tampflerl-rtr4.tampabay.rr.com (65.32.8.137) 9.046 ms 9.906 ms 15.000 ms
4 so-8-1.car2.tampa1.level3.net (4.79.146.9) 9.477 ms 10.890 ms 11.528 ms
5 ae-1-55.mp1.tampa1.level3.net (4.68.104.129) 10.911 ms ae-1-53.mp1.tampa1.level3.net (4.68.104.65) 10.028 ms ae-1-55.mp1.tampa1.level3.net (4.68.104.129) 10.021 ms
6 ae-0-0.bbr1.atlanta1.level3.net (64.159.1.45) 33.983 ms as-0-0.bbr2.atlanta1.level3.net (64.159.3.250) <27.897 ms 27.024 ms
7 * * *
8 * ae-4-4.car1.charlotte1.level3.net (4.69.132.161) 31.170 ms *
9 roadrunner.car1.charlotte1.level3.net (4.71.124.2) 32.189 ms 32.587 ms ae-4-4.car1.charlotte1.level3.net (4.69.132.161) 35.026 ms
10 pos12-3.rlghncrdc-rtr2.southeast.rr.com (24.93.64.58) 37.044 ms roadrunner.car1.charlotte1.level3.net (4.71.124.6) 34.571 ms roadrunner.car1.charlotte1.level3.net (4.71.124.2) 32.553 ms
11 pos7-0.rlghnca-rtr2.nc.rr.com (24.25.0.10) 39.561 ms pos12-2.rlghncrdc-rtr2.southeast.rr.com (24.93.64.82) 40.224 ms pos7-0.rlghnca-rtr2.nc.rr.com (24.25.0.10) 38.044 ms
12 gig0-2.rlghnca-ubr5.nc.rr.com (24.25.0.197) 37.010 ms pos7-0.rlghnca-rtr2.nc.rr.com (24.25.0.10) 38.245 ms gig0-2.rlghnca-ubr5.nc.rr.com (24.25.0.197) 39.494 ms
13 gig0-2.rlghnca-ubr5.nc.rr.com (24.25.0.197) 38.985 ms 37.969 ms *
<lots of * * * till 64th hop> |
Lastly, here is another that can access the site but has issues too:
Code: | 1 113 ms 110 ms 109 ms 63.215.29.225
2 108 ms 109 ms 104 ms 63.212.220.2
3 108 ms 105 ms 109 ms 4.68.124.249
4 121 ms 119 ms 118 ms 64.159.0.166
5 132 ms 133 ms 120 ms 4.68.103.190
6 127 ms 128 ms * 4.69.132.161
7 126 ms 129 ms 124 ms 4.69.132.161
8 435 ms 344 ms 145 ms 24.93.64.82
9 134 ms 128 ms 130 ms 24.25.0.10
10 128 ms 128 ms 137 ms 24.25.0.197
11 128 ms * * 24.25.0.197
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out. |
So, any ideas on what's going on?
Thanks in advance,
DFO |
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moocha Watchman
Joined: 21 Oct 2003 Posts: 5722
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Posted: Sat Nov 25, 2006 1:21 pm Post subject: |
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This is not a DNS issue, it looks to be a routing and/or cabling issue. Clearly the problem is located either on the 24.25.0.197 router, at your end, or in the link in-between. I advise you contact RR technical support. _________________ Military Commissions Act of 2006: http://tinyurl.com/jrcto
"Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety."
-- attributed to Benjamin Franklin |
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svancouw n00b
Joined: 05 Feb 2006 Posts: 57 Location: California
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Posted: Sat Nov 25, 2006 11:58 pm Post subject: |
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I find it interesting that when you run a traceroute on your own system that it returns a private IP address. How do you have your system set up? Are you forwarding ports to the .2 address? If so, I would suggest that this might be the problem.
Having set up nameservers in the past (and again recently), you should think about either placing the server in the DMZ on your router, give it a public IP address, and remove all private IP addresses. This should remove any problems that you encounter. Since you have a DNS server, you obviously have at least one static IP address, so it should be inexpensive to purchase more from your ISP if you need to.
A DNS server uses at least three or four ports to properly maintain itself. If you must do port forwarding, make sure that you are redirecting all the necessary ports.
I'm not convinced that this is a cabling issue. The ones that are able to do a traceroute to your system, does it only sometimes work for them, or does it always work for some and never for others? |
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bunder Bodhisattva
Joined: 10 Apr 2004 Posts: 5947
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Posted: Sun Nov 26, 2006 2:39 am Post subject: |
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my tracert seems to point to level3...
Code: |
>tracert thelst.com
Tracing route to thelst.com [71.77.69.142]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms linuxrouter.internal.hamiltonshells.com [192.168.0.1]
2 6 ms 5 ms 5 ms 10.69.64.1
3 6 ms 6 ms 5 ms d226-5-225.home.cgocable.net [24.226.5.225]
4 9 ms 11 ms 7 ms cgowave-0-113.cgocable.net [24.226.0.113]
5 8 ms 7 ms 9 ms g0-9.na21.b011027-0.yyz01.atlas.cogentco.com [38.112.22.69]
6 185 ms 215 ms 204 ms v3493.mpd01.yyz01.atlas.cogentco.com [154.54.5.85]
7 8 ms 7 ms 7 ms g3-0-0-3491.core01.yyz01.atlas.cogentco.com [154.54.5.77]
8 22 ms 21 ms 21 ms p13-0.core02.ord01.atlas.cogentco.com [66.28.4.213]
9 25 ms 23 ms 22 ms te3-3.mpd01.ord01.atlas.cogentco.com [154.54.1.178]
10 23 ms 22 ms 23 ms v3498.mpd01.ord03.atlas.cogentco.com [154.54.5.2]
11 24 ms 22 ms 21 ms g9-0-0-3491.core01.ord03.atlas.cogentco.com [154.54.3.237]
12 21 ms 23 ms 31 ms so-3-0-0-0.e1.Chicago1.Level3.net [4.68.127.129]
13 * * * Request timed out.
14 * * 23 ms ae-1-100.ebr2.Chicago1.Level3.net [4.69.132.42]
15 * 44 ms 38 ms ae-2.ebr2.Washington1.Level3.net [4.69.132.70]
16 45 ms 50 ms 44 ms ae-6-6.car2.Raleigh1.Level3.net [4.69.132.177]
17 49 ms 43 ms 47 ms ae-11-11.car1.Raleigh1.Level3.net [4.69.132.173]
18 50 ms 54 ms 50 ms pos12-2.rlghncrdc-rtr1.southeast.rr.com [24.93.64.10]
19 50 ms 53 ms 51 ms pos12-0.rlghncrdc-rtr1.nc.rr.com [24.93.64.38]
20 56 ms 55 ms 50 ms pos7-0.rlghnca-rtr1.nc.rr.com [24.25.0.6]
21 53 ms 50 ms 52 ms pos6-0.rlghnca-rtr2.nc.rr.com [24.25.0.14]
22 62 ms 59 ms 57 ms cpe-071-077-069-142.nc.res.rr.com [71.77.69.142]
Trace complete.
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edit: page loads fine here too.
cheers _________________
Neddyseagoon wrote: | The problem with leaving is that you can only do it once and it reduces your influence. |
banned from #gentoo since sept 2017 |
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svancouw n00b
Joined: 05 Feb 2006 Posts: 57 Location: California
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Posted: Sun Nov 26, 2006 7:10 am Post subject: |
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I have noticed now that nearly every time a traceroute is performed, a different target IP address appears. This tells me that you are using a dynamic IP address and using something like dyndns.org to set up your website. Is this correct? This could be the reason that you could not easily set up your domain to allow internal access to you external website. My traceroute came up with 157, .142 and .122 for the same domain name just today.
Since you are using a domain I can safely infer that you are using a Windows-based network. If I am interpreting this correctly, you would not be able to set up a static DNS record in your Domain DNS server, where you would point www to the IP address of your website. I work part-time at a credit union network admin, and that is what we do. The reason this happens is that when your domain has the same domain as the address of the website, the system tries to resolve www to itself and fails. When you put a www record in the Windows DNS server, it can simply forward the request directly to th web server.
I may be completely mis-interpreting this, and my apologies if I have, and doubly so if you already know this. Any additional information would be helpful.
My traceroute results:
C:\Documents and Settings\Sean>tracert the1st.com
Tracing route to the1st.com [66.28.84.157]
over a maximum of 30 hops:
1 2 ms 1 ms 1 ms 64-142-83-200.dsl.static.sonic.net [64.142.83.20
0]
2 11 ms 11 ms 10 ms 64-142-83-1.dsl.static.sonic.net [64.142.83.1]
3 13 ms 11 ms 11 ms 1.fe-1-1-0.gw4.200p-sf.sonic.net [64.142.32.8]
4 13 ms 12 ms 12 ms 0.ge-0-1-0.gw.sr.sonic.net [64.142.0.197]
5 12 ms 13 ms 13 ms 2.ge-2-1-0.gw2.sr.sonic.net [208.201.224.37]
6 16 ms 16 ms 17 ms 0.ge-1-0-0.gw2.equinix-sj.sonic.net [64.142.0.20
6]
7 17 ms 18 ms 17 ms GigabitEthernet1-0.GW1.SJC7.ALTER.NET [157.130.2
14.177]
8 16 ms 17 ms 18 ms POS1-0.XR2.SJC7.ALTER.NET [152.63.53.194]
9 88 ms 86 ms 88 ms 0.so-3-2-0.XL2.NYC1.ALTER.NET [152.63.16.5]
10 85 ms 86 ms 87 ms POS7-0.GW9.NYC1.ALTER.NET [152.63.9.1]
11 84 ms 84 ms 84 ms r2-pos2-3.in.nycmnyzr.cv.net [65.19.102.145]
12 85 ms 86 ms 85 ms 451be091.cst.lightpath.net [65.19.96.145]
13 85 ms 85 ms 85 ms r1-srp1-0.cr.whplny.cv.net [65.19.120.3]
14 85 ms 86 ms 85 ms r2-srp5-0.cst.whplny.cv.net [65.19.120.36]
15 85 ms 85 ms 85 ms r5-ge9-16.cst.whplny.cv.net [65.19.121.154]
16 88 ms 87 ms 88 ms 454a4a66.cst.lightpath.net [69.74.74.102]
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.
Trace complete.
nslookup results:
C:\Documents and Settings\Sean>nslookup the1st.com
Server: ns1.sonic.net
Address: 208.201.224.11
Non-authoritative answer:
Name: the1st.com
Address: 66.28.84.157 |
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bunder Bodhisattva
Joined: 10 Apr 2004 Posts: 5947
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Posted: Sun Nov 26, 2006 9:04 am Post subject: |
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svancouw wrote: | Since you are using a domain I can safely infer that you are using a Windows-based network. |
Since when does having a domain require you to use windows servers?
svancouw wrote: | Having set up nameservers in the past (and again recently), you should think about either placing the server in the DMZ on your router, give it a public IP address, and remove all private IP addresses. This should remove any problems that you encounter. Since you have a DNS server, you obviously have at least one static IP address, so it should be inexpensive to purchase more from your ISP if you need to. |
Nothing wrong with having a network behind a NAT firewall... just use a seperate zone for the internal addresses. Please don't add to the already problematic IP wastage. (yes i know ipv6 fixes that, but i don't see the need for it if we readdressed the internet heh)
svancouw wrote: | A DNS server uses at least three or four ports to properly maintain itself. If you must do port forwarding, make sure that you are redirecting all the necessary ports. |
Last time I checked, bind only required port 53 tcp+udp. Even if you count the protocols, that's only 2 ports.
Sorry if this seems like a flame, but I'm afraid I disagree with you.
BTW: I still think it's level3's fault...
Code: | >tracert thelst.com
Tracing route to thelst.com [71.77.8.122]
over a maximum of 30 hops:
[[hops removed for security purposes, i'm at work.]]
5 <1 ms <1 ms 1 ms bb1-core-HAM-AAA-G20-v98.fibrewired.ca [216.185.64.185]
6 6 ms 55 ms 3 ms g7-13.mpd01.yyz02.atlas.cogentco.com [38.112.1.49]
7 1 ms 1 ms 2 ms v3492.mpd01.yyz01.atlas.cogentco.com [154.54.5.81]
8 1 ms 1 ms 1 ms g2-0-0-3490.core01.yyz01.atlas.cogentco.com [154.54.5.73]
9 15 ms 15 ms 15 ms p13-0.core02.ord01.atlas.cogentco.com [66.28.4.213]
10 15 ms 15 ms 15 ms te4-3.mpd01.ord01.atlas.cogentco.com [154.54.3.254]
11 15 ms 15 ms 15 ms v3488.mpd01.ord03.atlas.cogentco.com [154.54.5.26]
12 15 ms 15 ms 15 ms g6-0-0-3492.core01.ord03.atlas.cogentco.com [154.54.3.241]
13 17 ms 17 ms 17 ms so-3-0-0-0.e1.Chicago1.Level3.net [4.68.127.129]
14 21 ms 24 ms * ae-31-55.ebr1.Chicago1.Level3.net [4.68.101.158]
15 25 ms * * ae-1-100.ebr2.Chicago1.Level3.net [4.69.132.42]
16 * 41 ms 41 ms ae-6-6.car2.Raleigh1.Level3.net [4.69.132.177]
17 41 ms 41 ms 41 ms ae-6-6.car2.Raleigh1.Level3.net [4.69.132.177]
18 41 ms 42 ms 42 ms ROADRUNNER.car1.Raleigh1.Level3.net [4.71.160.2]
19 42 ms 42 ms 42 ms pos12-2.rlghncrdc-rtr1.southeast.rr.com [24.93.64.10]
20 42 ms 42 ms 42 ms pos7-0.rlghnca-rtr1.nc.rr.com [24.25.0.6]
21 42 ms 43 ms 42 ms pos7-0.rlghnca-rtr1.nc.rr.com [24.25.0.6]
22 43 ms 43 ms 43 ms pos6-0.rlghnca-rtr2.nc.rr.com [24.25.0.14]
23 49 ms 49 ms 44 ms gig0-2.rlghnca-ubr5.nc.rr.com [24.25.0.197]
24 50 ms 54 ms 49 ms cpe-071-077-008-122.nc.res.rr.com [71.77.8.122]
Trace complete. |
_________________
Neddyseagoon wrote: | The problem with leaving is that you can only do it once and it reduces your influence. |
banned from #gentoo since sept 2017 |
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svancouw n00b
Joined: 05 Feb 2006 Posts: 57 Location: California
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Posted: Sun Nov 26, 2006 4:08 pm Post subject: |
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Not taken as a flame at all. I'm afraid I've worked too much with Windows and not enough with Linux, comparatively, so you are right to correct me. I'm not sure about running a domain off of a dynamic IP address, but that idea has some merit and everyone's free to express their opinions.
The reason I love this forum is that people can be honest and safely disagree. Ideas flow and problems are solved.
I suppose it could be level3's fault, but they never showed up in my traceroute at all (although the first timed out response could be them, there's no data to support that). Without having more information, I believe it is more likely to be a configuration issue.
I ran a whois lookup, and the1st.com appears to be hosted (or at least the authoritive DNS servers are there) by tidewater.net, and not dependant on level3. My traceroute is able to reach them without problems. |
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