sendmail and dig hangs on earthlink.net

[Kevin Darcy]

The response to an ANY query for earthlink.net exceeds 512 bytes if a full
Additional Section is included, so I suspect that your resolver is attempting
to retry the query using TCP and running into a different set of
firewall/router rules/filters for that protocol.


- Kevin

FrankRam at earthlink.net wrote:

> I'm having a problem that seems to be related to DNS.  Sendmail hangs
> when trying to resolve earthlink.net.
> $ cat .bashrc | sendmail -d xxxxxxxx at earthlink.net
> Version 8.9.3
>  Compiled with: LOG MATCHGECOS MIME7TO8 MIME8TO7 NAMED_BIND NETINET
>                 NETUNIX NEWDB NIS QUEUE SCANF SMTP USERDB
>         :
>         :
> --parseaddr(xxxxxx at earthlink.net)
> rewrite: ruleset   3   input: xxxxxx @ earthlink . net
> rewrite: ruleset  96   input: xxxxxx < @ earthlink . net >
> map_lookup(host, earthlink.net) => host_map_lookup(earthlink.net) =>
> ----- Hangs until <Ctrl>C ---------
>
> $ dig earthlink.net any
>
> ; <<>> DiG 8.2 <<>> earthlink.net any
> ;; res options: init recurs defnam dnsrch
> ----- Hangs until <Ctrl>C ---------
>
> But, nslookup:
> > set q=mx
> > earthlink.net
> Server:  dns1.texas.rr.com
> Address:  24.93.35.32
>
> Non-authoritative answer:
> earthlink.net   preference = 5, mail exchanger = mx00.earthlink.net
> earthlink.net   preference = 5, mail exchanger = mx01.earthlink.net
> earthlink.net   preference = 5, mail exchanger = mx02.earthlink.net
> earthlink.net   preference = 5, mail exchanger = mx03.earthlink.net
> earthlink.net   preference = 5, mail exchanger = mx04.earthlink.net
> earthlink.net   preference = 5, mail exchanger = mx05.earthlink.net
> earthlink.net   preference = 5, mail exchanger = mx06.earthlink.net
> earthlink.net   preference = 5, mail exchanger = mx07.earthlink.net
> earthlink.net   preference = 5, mail exchanger = mx08.earthlink.net
>
> Authoritative answers can be found from:
> mx00.earthlink.net      internet address = 207.217.120.28
> mx01.earthlink.net      internet address = 207.217.120.29
> mx04.earthlink.net      internet address = 207.217.120.100
> mx05.earthlink.net      internet address = 207.217.120.121
> mx06.earthlink.net      internet address = 207.217.120.130
> >
> ( But set q=any hangs)
>
> I've tried a number of other domains, and all others have succeded.
>
> Any ideas where I can look?
>
> Oh, here's my setup
> Internet<--->firewall/dns(caching)/sendmail<--->private lan
>
> Frank
> Frank M. Ramaekers Jr. Integrated Business Technologies Phone: 303-375-2471
> IT Systems Specialist  1190 S. Colorado Blvd., #301     Fax:   781-623-5830
> MCSE & MCP+Internet    Denver, Colorado  80246