Telnet is not working with iptables

[Ahmed Sharif]

Hello Siddiqui,

You are appending to the existing rules (option -A). There may be other rule
above your rule that is causing denial of the the specific port. Check the
rule list with iptables -nL command. You can also try inserting the rule
instead of appending (-I option). Another thing to try is, while trying to
do telnet on that specific port run iptables -nVL command at the destination
and observing the packet count increament you will understand what rule is
causing the problem.


Thanks and Regards,

Ahmed Sharif
Warid Telecom International Ltd
Bangladesh

On Tue, Sep 29, 2009 at 3:51 PM, Shariq Siddiqui
<shariq.siddiqui at yahoo.com>wrote:

>
> Hi All,
>
> i am facing a lil bit problem, hope anyone out there can help me...
>
>
> i want to open specific port using iptables i.e 3159
>
> Whenever i tried to telnet it generates the following error
>
>
> # telnet 172.16.4.100 3195
> Trying 172.16.4.100...
> telnet: connect to address 172.16.4.100: No route to host
> telnet: Unable to connect to remote host: No route to hostbut when I
> stopped iptables
>
>
> # service iptables stopIts working fine
>
> i added the ports in iptables i.e.
>
>
> #iptables -A INPUT -p tcp --dport 3195 -j ACCEPTfor safe side I also added
> telnet port
>
>
> #iptables -A INPUT -p tcp --dport 23 -j ACCEPT
> but result was same....
>
> In short telnet works without iptables but with iptables it generates the
> error mentioned above
>
>
>
> Best Regards,
>
> Shariq Siddiqui
> Advanced Operations Technology
> PO.Box : 25904 - Riyadh 11476
> Riyadh Saudi Arabia
> Tel : +966 1 291 0605 -
> Fax:+966 1 291 3328
>
>
>
>
>
>
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