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Date:      Sat, 20 May 2000 18:31:38 -0700
From:      "Khairuddin Abdul Ghani" <abdulgha@usc.edu>
To:        <freebsd-questions@FreeBSD.ORG>
Subject:   talkd error: [Error on write to talk daemon : Permission denied (13)]
Message-ID:  <003b01bfc2c4$4f094790$6f1f7d80@phoenix>

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Hi everyone!

There seems to be an error with my ntalkd recently. Whenever someone would
want to 'talk' to someone on localhost, he/she gets the message

    [No connection yet]
    [Error on write to talk daemon : Permission denied (13)]

and the talk program quits. I checked, and it seems that the following ipfw
rule was causing it:

    00200 deny ip from any to 127.0.0.0/8

which is weird since that rule is a default from within /etc/rc.firewall.
When I remove this rule, I would instead get the following:

    [No connection yet]
    [Checking for invitation on caller's machine]
    [Checking for invitation on caller's machine]
    .
    .

The thing is, talkd seemed to work fine before. But lately, many other weird
things have been happening. An increase in incoming traffic would sometimes
cause the box to shutdown most vital internet daemons, plus delete certain
lib files like mm (for apache) and tcl. Looks to me like the box has been
breached, but I've checked all the advisories and all seem to have been
taken care off. Anyhow, I'll paste some of the configuration that might be
causing these below, and hopefully there's someone out there who can help!
Thanks all. :)

Regards, Rudy.

ipfw rules:
00100 allow ip from any to any via lo0
00200 deny ip from any to 127.0.0.0/8
00500 pipe 1 udp from any to any
02000 allow tcp from any to 127.0.0.0/8 3306
02100 deny tcp from any to any 3306 <-- deny remote sql requests.
65000 allow ip from any to any
65535 allow ip from any to any

netstat -nr:
Internet:
Destination        Gateway            Flags      Netif Expire
default            216.65.57.1        UGSc       fxp0
xxx.25.134         link#1             UC         fxp0 =>
xxx.25.134.1       0:a0:c9:e8:c3:1f   UHLW       fxp0   1114
xxx.25.134.2       0:90:27:ad:45:5d   UHLS        lo0
xxx.25.134.3       0:90:27:ad:45:5d   UHLS       fxp0
.
.
yyy.65.57          link#1             UC         fxp0 =>
yyy.65.57.1        0:a0:c9:e8:c3:1f   UHLW       fxp0   1186
yyy.65.57.2        0:90:27:ad:45:5d   UHLW        lo0
yyy.65.57.3        0:90:27:ad:45:5d   UHLS       fxp0
.
.
yyy.65.57.255      ff:ff:ff:ff:ff:ff  UHLWb      fxp0





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