When using iChat with NAT routers and firewalls, certain ports must be open to allow video and audio conferencing behind a firewall. Some devices have these ports open by default, while others require configuration. Note: This article lists all ports used by iChat, not just those used by audio/visual content. A list of individual port functions can be found in "'Well known' TCP and UDP ports used by Apple software products".
edit: SOLVED - see below for solution
Hi there,
I've inherited a gob of Linux hosts and so am learning linux from the bottom of the deep end of the pool (gotta say I'm warming up to Linux though - it's not half bad)
Right now iptables is confusing me and I could use some pointers as to how... (0 Replies)
Upon replacing my linux router/server with a Solaris one I've noticed very poor network performance. The server itself has no issues connecting to the net, but clients using the server as a router are getting a lot of IP fragments as indicated from some packet sniffing I conducted.
Here was my... (3 Replies)
I've experienced this same issue with both the Endian Firewall Appliance and a Vyatta Firewall Appliance. Conversely, it works with a Draytek Firewall/Router.
I am trying to forward port 80 traffic to my internal web server which is located on the /24 subnet. I have an external static IP which... (0 Replies)
I set up remote printing on a clients Unix server to my Windows XP USB printer. My USB printer is connected directly to my PC (no print server and no network input on printer). With my Win XP PC connected to my cable modem (without the router), i can do
lp -dhp842c /etc/hosts and it prints. I... (7 Replies)
hi guys,
its been a while since my last visit here,
could not keep up the pace on this ever changing industry :)
i'd just doing my home research under vmware to make a solaris-based router-firewall using zones - doing a lot of reading about zones & review solaris zone functionality.
and... (4 Replies)
HI all,
I have setup IPTables firewall/Router and my home network, with address space 192.168.10.XXX
Form my private network hosts, i can ping the gateway ( 192.168.10.101 ) , but the reverse is not happening.
Can someone help me as of what i need to do, so that i can ping my private... (1 Reply)
NAT action in tc(8) Linux NAT action in tc(8)NAME
nat - stateless native address translation action
SYNOPSIS
tc ... action nat DIRECTION OLD NEW
DIRECTION := { ingress | egress }
OLD := IPV4_ADDR_SPEC
NEW := IPV4_ADDR_SPEC
IPV4_ADDR_SPEC := { default | any | all | in_addr[/{prefix|netmask}]
DESCRIPTION
The nat action allows to perform NAT without the overhead of conntrack, which is desirable if the number of flows or addresses to perform
NAT on is large. This action is best used in combination with the u32 filter to allow for efficient lookups of a large number of stateless
NAT rules in constant time.
OPTIONS
ingress
Translate destination addresses, i.e. perform DNAT.
egress Translate source addresses, i.e. perform SNAT.
OLD Specifies addresses which should be translated.
NEW Specifies addresses which OLD should be translated into.
NOTES
The accepted address format in OLD and NEW is quite flexible. It may either consist of one of the keywords default, any or all, represent-
ing the all-zero IP address or a combination of IP address and netmask or prefix length separated by a slash (/) sign. In any case, the
mask (or prefix length) value of OLD is used for NEW as well so that a one-to-one mapping of addresses is assured.
Address translation is done using a combination of binary operations. First, the original (source or destination) address is matched
against the value of OLD. If the original address fits, the new address is created by taking the leading bits from NEW (defined by the
netmask of OLD) and taking the remaining bits from the original address.
There is rudimental support for upper layer protocols, namely TCP, UDP and ICMP. While for the first two only checksum recalculation is
performed, the action also takes care of embedded IP headers in ICMP packets by translating the respective address therein, too.
SEE ALSO tc(8)iproute2 12 Jan 2015 NAT action in tc(8)