network connection problems

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I've been experiencing a weird network problem ever since installing the last
few days worth of Rawhide updates. Connecting to pretty much every known web
site works fine, with the exception of my own server at http://realify.com/.
Others can connect to realify.com with no problems, and I can ping realify.com
successfully. But HTTP, IMAP, etc.  connections all hang. I'm completely
stumped on this one.

In case this is helpful, I've attached the output of tcpdump
(reformatted for email) while trying to connect to http://realify.com/
from Firefox. Please let me know if you need any other information.

Even a suggestion of what program/library could be causing the problem
would be helpful so that I can file a bug for the right component (I'm
leaning towards glibc if no one suggests differently).

    # /usr/sbin/tcpdump -vv host realify.com
    tcpdump: listening on eth0, link-type EN10MB (Ethernet),
        capture size 96 bytes
    04:51:06.273466 IP
        (tos 0x0, ttl  64, id 9884, offset 0, flags [DF], proto 6, length: 60)
        192.168.2.62.36070 > elmer.realify.com.http:
        S [tcp sum ok] 3551010669:3551010669(0) win 5840
        <mss 1460,sackOK,timestamp 65550833 0,nop,wscale 7>
    04:51:06.368291 IP
        (tos 0x0, ttl  39, id 56706, offset 0, flags [DF], proto 6, length: 60)
        elmer.realify.com.http > 192.168.2.62.36070:
        S [tcp sum ok] 3538178458:3538178458(0) ack 3551010670 win 5792
        <mss 1460,sackOK,timestamp 29236351 65550833,nop,wscale 0>
    04:51:06.368367 IP
        (tos 0x0, ttl  64, id 9885, offset 0, flags [DF], proto 6, length: 52)
        192.168.2.62.36070 > elmer.realify.com.http:
        . [tcp sum ok] 1:1(0) ack 1 win 45
        <nop,nop,timestamp 65550928 29236351>
    04:51:06.368519 IP
        (tos 0x0, ttl  64, id 9886, offset 0, flags [DF], proto 6, length: 478)
        192.168.2.62.36070 > elmer.realify.com.http:
        P 1:427(426) ack 1 win 45
        <nop,nop,timestamp 65550928 29236351>
    04:51:06.467619 IP
        (tos 0x0, ttl  39, id 40030, offset 0, flags [DF], proto 6, length: 52)
        elmer.realify.com.http > 192.168.2.62.36070:
        . [tcp sum ok] 1:1(0) ack 427 win 6432
        <nop,nop,timestamp 29236361 65550928>

After that last packet, Firefox just sits there with the throbber
spinning and "Waiting for realify.com..." in the status bar. Looking at
the same sequence also in ethereal, it seems that Firefox sends the HTTP
GET request, receives a TCP ACK, but then never receives the actual HTTP
reply.

gary



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