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+++ Bijoy Paul [linux-india] <23/10/01 22:36 -0700>:
> I hv a server on RH 7.1 which serves http, ftp and
> sendmail service for intranet as well as internet
> users. Currently I hv configured may firewall to drop
> any SYN packets coming on any other port. But I hv
> seen so much requests coming on port 113 (AUTH PORT)
> and getting dropped. I hv heared Sendmail requires
> port 113 sometimes. SO is it necessroy to open port
> 113 for proper functionality. Is there any security
> risc in opening that port...
Port 113 = identd. No particular hassle leaving that port open.
In any case, all you need to do is to config sendmail to set identd timeout
to zero seconds ... set confTO_IDENT in sendmail.mc and rebuild the cf file.
define(`confTO_IDENT',0)
Or simply forget it and open up the identd port, no hassle.
-srs
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