Routing Issue. Help!

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Sylvus
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Routing Issue. Help!

Post by Sylvus »

Pretty sure that one of you works in networking, and I'm at my wits' end, so I figure it can't hurt to try here. Having a problem connecting to my Dreamhost server via my Comcast network. It's not a DNS issue, it resolves ok; I think it has to be routing, as a traceroute always times out after like 15 hops.

I know that the server is up. If I VPN into my work network, I can reach it just fine. If I shut off wifi on my iPhone, I can hit it just fine from the cellular network. It's got to be something specifically between Comcast's network and Dreamhost, right?

I've called Comcast numerous times now and their tech support is the worst in the world. In my most recent foray, they transferred me to the "elite" xfinity support, who told me that they'd be happy to have a technician help me out for $79, and he'd RDP into my machine or something. To which I told them to pound sand, since it's a problem on their fucking end and there's no way I'm paying money for that bullshit. If there were a better alternative to Comcast in my area, I'd switch in a heartbeat.

Is there anything I can do on my end?
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Animalor
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Re: Routing Issue. Help!

Post by Animalor »

If you look at your traceroute, do you have 2 ip addresses that constantly repeat? Can you post the trace by chance?
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Re: Routing Issue. Help!

Post by Sylvus »

Code: Select all

Tracing route to force.dreamhost.com [69.163.182.25]
over a maximum of 30 hops:


  5    18 ms    14 ms    11 ms  te-0-8-0-6-ar01.pontiac.mi.michigan.comcast.net
[68.87.191.150]
  6    30 ms    35 ms    23 ms  he-4-3-0-0-cr01.350ecermak.il.ibone.comcast.net
[68.86.90.109]
  7    18 ms    19 ms    19 ms  pos-1-6-0-0-pe01.350ecermak.il.ibone.comcast.net
 [68.86.87.130]
  8    17 ms    17 ms    18 ms  as6461.350ecermak.il.ibone.comcast.net [66.208.2
29.254]
  9    17 ms    23 ms    18 ms  xe-4-2-0.cr2.ord2.us.above.net [64.125.22.213]
 10    79 ms    83 ms    80 ms  xe-0-2-0.cr2.sjc2.us.above.net [64.125.26.141]
 11    89 ms    88 ms    90 ms  xe-1-2-0.cr2.lax112.us.above.net [64.125.31.234]

 12    89 ms   123 ms    88 ms  xe-0-1-0.mpr1.lax7.us.above.net [64.125.30.5]
 13    88 ms    90 ms    88 ms  64.124.196.90
 14   281 ms   229 ms     *     ip-208-113-190-1.dreamhost.com [208.113.190.1]
 15     *        *        *     Request timed out.
 16     *        *        *     Request timed out.
 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.
Another

Code: Select all

Tracing route to mattpollak.com [67.205.2.47]
over a maximum of 30 hops:

  5    10 ms    15 ms    19 ms  te-0-8-0-6-ar01.pontiac.mi.michigan.comcast.net [68.87.191.150]
  6    21 ms    23 ms    23 ms  he-4-3-0-0-cr01.350ecermak.il.ibone.comcast.net [68.86.90.109]
  7    18 ms    18 ms    23 ms  pos-1-1-0-0-pe01.350ecermak.il.ibone.comcast.net [68.86.86.38]
  8    20 ms    18 ms    18 ms  as6461.350ecermak.il.ibone.comcast.net [66.208.229.254]
  9    23 ms    18 ms    18 ms  xe-4-2-0.cr2.ord2.us.above.net [64.125.22.213]
 10   128 ms    79 ms   129 ms  xe-0-2-0.cr2.sjc2.us.above.net [64.125.26.141]
 11    90 ms   102 ms   111 ms  xe-1-2-0.cr2.lax112.us.above.net [64.125.31.234]
 12    89 ms   175 ms    89 ms  xe-0-1-0.mpr1.lax7.us.above.net [64.125.30.5]
 13    92 ms    89 ms    90 ms  64.124.196.90
 14   231 ms     *      161 ms  ip-208-113-190-1.dreamhost.com [208.113.190.1]
 15   142 ms   141 ms   237 ms  router-0.hq.newdream.net [66.33.201.1]
 16     *        *        *     Request timed out.
 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.
If i try a proxy, for example http://anonymouse.org/cgi-bin/anon-www. ... ollak.com/, it works just fine.
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Zaelath
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Re: Routing Issue. Help!

Post by Zaelath »

Traceroute doesn't really tell you what you think it does..

It uses UDP packets by default (on linux, and I think windows)

My UDP trace stopped at the same place the first time I tried, however now it's getting a little further (I think dreamhost had a hosed router)

Code: Select all

11  xe-0-1-0.mpr1.lax7.us.above.net (64.125.30.5)  220.449 ms  219.645 ms  220.437 ms
12   (64.124.196.90)  197.231 ms  195.971 ms  194.776 ms
13  ip-208-113-190-1.dreamhost.com (208.113.190.1)  195.469 ms  195.580 ms  199.145 ms
14  router-0.hq.newdream.net (66.33.201.1)  243.791 ms * router-0.hq.newdream.net (66.33.201.1)  270.403 ms
15  * * *
16  * * *
If you use a ICMP traceroute you can get all the way to the host:

Code: Select all

11  xe-0-1-0.mpr1.lax7.us.above.net (64.125.30.5)  229.536 ms  227.877 ms  226.546 ms
12   (64.124.196.90)  197.138 ms  197.862 ms  200.140 ms
13  ip-208-113-190-1.dreamhost.com (208.113.190.1)  246.824 ms * *
14  router-0.hq.newdream.net (66.33.201.1)  354.192 ms * *
15  force.dreamhost.com (69.163.182.25)  220.148 ms  198.200 ms  198.167 ms
I suspect your problem is solved now though.
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Zaelath
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Re: Routing Issue. Help!

Post by Zaelath »

BTW, unless you forged the first couple of hops, you divulged a lot of information about your personal connection on a forum that's indexed by google..

99% of the time you can drop the first 50% of the traceroute hops and it doesn't make a difference from a networking diagnosis perspective, and I'd go back and edit out at least lines 1 and 2 from your posts...

Oh, and if it's not solved, it's probably dreamhost firewalling your IP because they think you're a dirty hacker, or their router doesn't know how to find your IP/Comcast. Either way I'd hassle dreamhost first, it's more likely to be their problem since it occurs at the last hop.
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Re: Routing Issue. Help!

Post by Sylvus »

Thx info, I was seeing red after my call with comcast and didn't think to obfuscate the first few hops.

I'd originally opened tickets with Dreamhost when I first noticed this, and the guy was so helpful and (seemingly) knowledgeable that I assumed his blame of Comcast was correct. I'll re-open.
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Re: Routing Issue. Help!

Post by Animalor »

I tend to agree with Zelath I was able to see through right to your host without any issue through a completely path and it went through just fine.
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